CN106161258B - It is used for transmission the method, equipment and system of multicast protocol message - Google Patents

Abstract

This application provides the methods, equipment and system that are used for transmission multicast protocol message, can separate the transmission of multicast protocol message with the transmission of multicast data message, the forward efficiency for helping to improve multicast data message is low.In this method, first PE equipment is according to multicast protocol message, obtain the private network singlecast router of the first PE equipment to the 2nd PE equipment, the destination address of private network singlecast router of the first PE equipment to the 2nd PE equipment is private network IP address of the 2nd PE equipment in NG MVPN, and the private network IP address is identical as the public network IP address of the 2nd PE equipment；The first PE equipment sends the multicast protocol message to the 2nd PE equipment in the form of unicast according to the public network IP address of the 2nd PE equipment.

Description

Method, device and system for transmitting multicast protocol message

technical field

The invention relates to the technical field of communication, in particular to a method, device and system for transmitting multicast protocol messages.

Background technique

Multicast Virtual Private Network (MVPN) is a technology based on Border Gateway Protocol (BGP) and Multiprotocol Label Switching (MPLS). The technology to realize the transmission of multicast packets in VPN).

In the MVPN technology, a provider edge (provider edge, PE) device receives a multicast message sent by a private network user edge (customer edge, CE) device. The PE device encapsulates the multicast packet according to the packet format supported by the set public network tunnel, and obtains the encapsulated multicast packet. The PE sends the encapsulated multicast message to the receiver of the multicast message through the specified public network tunnel, so as to realize the transmission of the multicast message between private networks.

If the multicast packet is a multicast protocol packet, the PE device can encapsulate the multicast protocol packet according to the packet format supported by the set public network tunnel to obtain the encapsulated multicast protocol packet. If the multicast packet is a multicast data packet, the PE device can encapsulate the multicast data packet according to the packet format supported by the set public network tunnel to obtain the encapsulated multicast data packet. The PE device can send encapsulated multicast data packets and/or encapsulated multicast protocol packets through the public network tunnel. Since the encapsulated multicast data packet and the encapsulated multicast protocol packet transmitted in the public network tunnel have the same packet format, the device receiving the encapsulated multicast packet needs to The packet is identified to determine whether the received encapsulated multicast packet is an encapsulated multicast protocol packet or an encapsulated multicast data packet, which reduces the forwarding efficiency of the multicast data packet.

Contents of the invention

In view of this, the embodiments of the present invention provide a method, device and system for transmitting multicast protocol packets, which can separate the transmission of multicast protocol packets from the transmission of multicast data packets, which facilitates Improving the forwarding efficiency of multicast data packets is low.

The technical solutions provided by the embodiments of the present invention are as follows.

In the first aspect, a method for transmitting multicast protocol packets is provided, including:

The first PE device obtains the multicast protocol packet;

The first PE device obtains the identifier of the second PE device according to the next-generation multicast virtual private network (NextGeneration Multicast Virtual Private Network, NG MVPN) to which the multicast protocol message belongs, and the second PE device is deployed The PE device of the NG MVPN;

The first PE device queries the private network unicast route from the first PE device to the second PE device according to the private network unicast routing table and the identifier of the second PE device, and the first PE device The destination address of the private network unicast route to the second PE device is the private network Internet Protocol (Internet Protocol, IP) address of the second PE device in the NG MVPN, and the private network IP address is the same as the The public network IP address of the second PE device is the same;

The first PE device sends the multicast protocol message to the second PE device in a unicast form according to the public network IP address of the second PE device.

In the first possible implementation manner of the first aspect, it also includes:

The first PE device obtains the identifier of a third PE device according to the NG MVPN to which the multicast protocol message belongs, and the third PE device is the PE device on which the NG MVPN is deployed;

The first PE device queries the private network unicast route from the first PE device to the third PE device according to the private network unicast routing table and the identifier of the third PE device, and the first PE device The destination address of the private network unicast route from the PE device to the third PE device is the private network IP address of the third PE device in the NG MVPN, and the private network IP address is the same as that of the third PE device The public IP addresses are the same;

The first PE device sends the multicast protocol packet to the third PE device in a unicast form according to the public network IP address of the third PE device.

In combination with the above first aspect or the first possible implementation manner of the first aspect, a second possible implementation manner of the first aspect is also provided, where the acquisition of the multicast protocol packet by the first PE device includes:

The first PE device receives a first self-report message (Boot Strap Message, BSM) sent by the first CE device;

The first PE device performs a reverse path forwarding (Reverse Path Forwarding, RPF) check to check whether the unicast route from the first PE device to the CE device generating the first BSM is optimal, and the first BSM generated by the first CE device or the second CE device;

If the unicast route from the first PE device to the CE device generating the first BSM is optimal, the first PE device uses the first BSM as the multicast protocol packet.

In combination with the first aspect, the first possible implementation of the first aspect, or the second possible implementation of the first aspect, a third possible implementation of the first aspect is also provided, the first PE The multicast protocol packets obtained by the device include:

The first PE device receives the second BSM sent by the third CE device, the second BSM is a BSM generated by the fourth PE device, the second BSM includes the private network IP address of the fourth PE device, and the The fourth PE device is a PE device deployed with the NGMVPN and connected to the third CE device;

The first PE device performs an RPF check according to the private network IP address of the fourth PE device, and checks whether the unicast route from the first PE device to the fourth PE device via the third CE device is optimal ;

If the unicast route from the first PE device to the fourth PE device via the third CE device is optimal, the first PE device uses the second BSM as the multicast protocol packet.

In the second aspect, a method for transmitting multicast protocol packets is provided, including:

The second PE device receives the multicast protocol packet sent by the first PE device in unicast form, and the second PE device is configured with the NG MVPN to which the multicast protocol packet belongs;

The second PE device performs processing according to the type of the multicast protocol packet.

In a first possible implementation manner of the second aspect, the multicast protocol message is a BSM, and the processing performed by the second PE device according to the type of the multicast protocol message includes:

The second PE device obtains the private network IP address of the device generating the BSM from the BSM;

The second PE device uses the private network IP address of the device generating the BSM to perform an RPF check to check whether the unicast route from the second PE device to the device generating the BSM via the first PE device is optimal ;

If the unicast route from the second PE device to the device generating the BSM via the first PE device is optimal, the second PE device broadcasts the BSM to the CE device connected to the second PE device. BSM.

In a third aspect, a first PE device is provided, including:

The first obtaining unit is used to obtain the multicast protocol message;

The second obtaining unit is configured to obtain the identifier of a second PE device according to the NG MVPN to which the multicast protocol message belongs, and the second PE device is the PE device on which the NG MVPN is deployed;

The first query unit is configured to query the private network unicast route from the first PE device to the second PE device according to the private network unicast routing table and the identifier of the second PE device, and the first PE device The destination address of the private network unicast route from the device to the second PE device is the private network IP address of the second PE device in the NG MVPN, and the private network IP address is the same as the public network address of the second PE device. The network IP addresses are the same;

The first sending unit is configured to send the multicast protocol message to the second PE device in unicast form according to the public network IP address of the second PE device.

In the first possible implementation manner of the third aspect, it also includes:

A third obtaining unit, configured to obtain an identifier of a third PE device according to the NG MVPN to which the multicast protocol message belongs, where the third PE device is the PE device on which the NG MVPN is deployed;

The second query unit is configured to query the private network unicast route from the first PE device to the third PE device according to the private network unicast routing table and the identifier of the third PE device, the first PE device The destination address of the private network unicast route from a PE device to the third PE device is the private network IP address of the third PE device in the NG MVPN, and the private network IP address and the third PE device The public IP addresses of the two are the same;

The second sending unit is configured to send the multicast protocol packet to the third PE device in unicast form according to the public network IP address of the third PE device.

In combination with the above third aspect or the first possible implementation of the third aspect, a second possible implementation of the third aspect is also provided,

The first obtaining unit is specifically configured to receive the first BSM sent by the first user edge CE device;

The first obtaining unit is specifically configured to perform an RPF check to check whether the unicast route from the first PE device to the CE device generating the first BSM is optimal, and the first BSM is provided by the first CE device or generated by the second CE device;

If the unicast route from the first PE device to the CE device generating the first BSM is optimal, the first acquiring unit uses the first BSM as the multicast protocol message.

In combination with the above third aspect, the first possible implementation manner of the third aspect, or the second possible implementation manner of the third aspect, a third possible implementation manner of the third aspect is also provided,

The first obtaining unit is specifically configured to receive a second BSM sent by the third CE device, the second BSM is a BSM generated by the fourth PE device, and the second BSM includes the private network IP of the fourth PE device address, the fourth PE device is the PE deployed with the NG MVPN and connected to the third CE device;

The first obtaining unit is specifically configured to perform an RPF check according to the private network IP address of the fourth PE device, and check a unicast route from the first PE device to the fourth PE device via the third CE device Is it optimal;

If the unicast route from the first PE device to the fourth PE device via the third CE device is optimal, the first obtaining unit is specifically configured to use the second BSM as the multicast protocol message.

In a fourth aspect, a second PE device is provided, including:

A receiving unit, configured to receive a multicast protocol message sent by the first PE device in unicast form, and the second PE device deploys the NG MVPN to which the multicast protocol message belongs;

A processing unit, configured to perform processing according to the type of the multicast protocol packet.

In a first possible implementation of the fourth aspect, the multicast protocol message is a BSM,

The processing unit is specifically configured to obtain the private network IP address of the device generating the BSM from the BSM;

The processing unit is specifically configured to use the private network IP address of the device generating the BSM to perform an RPF check, and check whether the unicast route from the second PE device to the device generating the BSM via the first PE device is the best excellent;

If the unicast route from the second PE device to the device generating the BSM via the first PE device is optimal, the processing unit broadcasts the BSM to CE devices connected to the second PE device.

The fifth aspect provides a system for transmitting multicast protocol packets, including: the third aspect or the first PE device provided by any possible implementation of the third aspect, and the fourth aspect or the first PE device A second PE device provided in any possible implementation manner of the four aspects.

It can be seen from the above technical solutions that the embodiments of the present invention have the following beneficial effects:

Embodiments of the present invention provide a method, device and system for transmitting multicast protocol messages. The first PE device obtains the multicast protocol message, and obtains the second PE device's NG MVPN according to the NG MVPN to which the multicast protocol message belongs. logo. The first PE device queries and obtains a private network unicast route from the first PE device to the second PE device according to the private network unicast routing table and the identifier of the second PE device, and the first PE device The destination address of the private network unicast route from the device to the second PE device is the private network IP address of the second PE device in the NG MVPN, and the private network IP address is the same as the public network address of the second PE device. The network IP addresses are the same; the first PE device sends the multicast protocol packet to the second PE device in a unicast form according to the public network IP address of the second PE device. The method, device, and system provided by the embodiments of the present invention can realize the separate transmission of multicast protocol messages in the public network, and the multicast data messages are still transmitted through the tunnel in the public network, and the The transmission and transmission of multicast data packets are separated, and the network equipment that receives the multicast packets does not need to parse the received multicast packets to distinguish between multicast data packets and multicast protocol packets, which improves the efficiency of multicast data packets. forwarding efficiency.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

FIG. 1 is a flowchart of a method for transmitting a multicast protocol message provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of a first scenario for obtaining a multicast protocol message provided by an embodiment of the present invention;

FIG. 3 is a schematic diagram of a second scenario for obtaining a multicast protocol packet provided by an embodiment of the present invention;

FIG. 4 is a schematic diagram of a third scenario for obtaining a multicast protocol packet provided by an embodiment of the present invention;

FIG. 5 is a schematic diagram of an NG MVPN networking structure provided by an embodiment of the present invention;

FIG. 6 is a flow chart of another method for transmitting multicast protocol packets provided by an embodiment of the present invention;

FIG. 7 is a schematic diagram of an application scenario network structure provided by an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a first PE device provided by an embodiment of the present invention;

FIG. 9 is a schematic structural diagram of a second PE device provided by an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a system for transmitting multicast protocol packets provided by an embodiment of the present invention;

FIG. 11 is a schematic diagram of a hardware structure of a first PE device provided by an embodiment of the present invention;

FIG. 12 is a schematic diagram of a hardware structure of a second PE device provided by an embodiment of the present invention;

FIG. 13 is a schematic diagram of a hardware structure of a system for transmitting multicast protocol packets provided by an embodiment of the present invention.

Detailed ways

Embodiments of the present invention provide methods, devices, and systems for transmitting multicast protocol messages. In order to make the purpose, technical solutions, and advantages of the embodiments of the present invention clearer, the following will describe the present invention in conjunction with the drawings in the embodiments of the present invention The technical solutions in the embodiments of the invention are clearly described.

Generally, during the transmission of multicast packets through the VPN, network devices process the received multicast protocol packets and multicast data packets differently. Since the encapsulated multicast data packet and the encapsulated multicast protocol packet transmitted in the specified public network tunnel have the same packet format, a network device receives a multicast packet transmitted by a public network tunnel Finally, it is necessary to analyze whether the multicast packet is a multicast data packet or a multicast protocol packet, and then perform different processing on the multicast packet according to the type of the received multicast packet. In the usual method for transmitting multicast packets, the network device needs to analyze each received multicast packet, and after the analysis obtains that the multicast packets are multicast data packets, forward the group broadcast data packets, reducing the forwarding efficiency of multicast data packets.

FIG. 1 is a flowchart of a method for transmitting multicast protocol packets provided by an embodiment of the present invention. The embodiment corresponding to FIG. 1 illustrates the method provided by the embodiment of the present invention from the side of the first PE. The method provided by the embodiment of the present invention will be described in detail below with reference to FIG. 1 .

101: The first PE device obtains the multicast protocol packet.

For example, if the multicast protocol packet is a multicast protocol packet generated by the first PE device, the first PE device obtains the multicast protocol packet generated by itself. The multicast protocol message can be a hello multicast protocol message, or a protocol independent multicast (Protocol Independent Multicast, PIM) join (join) or PIM pruning (prune) message, or a self-report message (Boot Strap Message, BSM), or other protocol messages broadcast to the protocol-independent multicast PIM router.

For example, the multicast protocol message may also be a multicast protocol message generated by a device other than the first PE device, and there are at least two possible implementations as follows:

In a first possible implementation manner, the acquisition of the multicast protocol packet by the first PE device includes: the first PE device receives the first BSM sent by the first CE device; the first PE device performs reverse path forwarding (reverse pathforwarding, RPF) check, check whether the unicast route from the first PE device to the CE device generating the first BSM is optimal, and the first BSM is provided by the first CE device or the second CE device Generate; if the unicast route from the first PE device to the CE device generating the first BSM is optimal, the first PE device uses the first BSM as the multicast protocol packet.

For example, the first possible implementation manner includes two implementation scenarios. In the first implementation scenario, as shown in FIG. 2 , the first BSM message is generated by the first CE device 201, and the first CE device 201 is directly connected to the first PE device 202, then the first The BSM carries the private network IP address of the first CE device 201 , and the first CE device 201 sends the generated first BSM message to the first PE device 202 . When the first PE device 202 receives the first BSM message sent by the first CE device 201, it performs an RPF check to check the unicast route from the first PE device 202 to the first CE device 201 that generated the first BSM Is it optimal. When the unicast route from the first PE device 202 to the first CE device 201 generating the first BSM is optimal, the first PE device 202 uses the first BSM as the multicast protocol report arts.

For example, when the unicast route from the first PE device 202 to the first CE device 201 generating the first BSM is not optimal, the first PE device 202 discards the first BSM.

For example, in the second implementation scenario included in the first possible implementation, as shown in FIG. 3 , the first BSM message is generated by the second CE device 301, and the first BSM carries the The private network IP address of the second CE device 301, the second CE device 301 sends the generated first BSM to the first CE device 201, and the first CE device 201 then sends the received first BSM to the The first PE device 202 directly connected to the first CE device 201. Wherein, the second CE device 301 may be a CE device directly connected to the first CE device 201, or may be a CE device indirectly connected to the first CE device 201 through at least one CE device. When the first PE device 202 receives the first BSM message sent by the first CE device 201, it performs an RPF check to check the unicast route from the first PE device 202 to the second CE device 301 that generated the first BSM Is it optimal. When the unicast route from the first PE device 202 to the second CE device 301 generating the first BSM is optimal, the first PE device 202 uses the first BSM as the multicast protocol report arts.

For example, when the unicast route from the first PE device 202 to the second CE device 301 generating the first BSM is not optimal, the first PE device 202 discards the first BSM.

In a second possible implementation manner, the acquisition of the multicast protocol packet by the first PE device includes: the first PE device receives a second BSM sent by the third CE device, and the second BSM is generated by the fourth PE device BSM, the second BSM includes the private network IP address of the fourth PE device, the fourth PE device is the PE device deployed with the NG MVPN and connected to the third CE device; A PE device performs an RPF check according to the private network IP address of the fourth PE device, and checks whether the unicast route from the first PE device to the fourth PE device via the third CE device is optimal; if the If the unicast route from the first PE device to the fourth PE device via the third CE device is optimal, the first PE device uses the second BSM as the multicast protocol packet. Wherein, the third CE device may be the same as the first CE device, or may be different from the first CE device.

As shown in FIG. 4 , the second BSM is generated by the fourth PE device 401 , and the second BSM carries the private network IP address of the fourth PE device 401 . The NG MVPN to which the second BSM belongs is configured on the fourth PE device 401 , and sends the second BSM to the third CE device 402 . The third CE device 402 then sends the second BSM to the first PE device 403 . The first PE device 403 is also configured with the NG MVPN to which the second BSM belongs, and at least two PE devices configured with the same NG MVPN are defined as neighbor PE devices under the NG MVPN. Then the first PE device 403 and the fourth PE device 401 are neighbor PE devices.

For example, after the first PE device 403 receives the second BSM, it obtains the private network IP address of the fourth PE device 401 carried in the second BSM, performs an RPF check, and checks the first PE device 403 Whether the unicast route from the third CE device 402 to the fourth PE device 401 is optimal. When the unicast route from the first PE device 403 to the fourth PE device 401 via the third CE device 402 is optimal, the first PE device 403 uses the second BSM as the group broadcast protocol packets.

For example, when the unicast route from the first PE device 403 to the fourth PE device 401 via the third CE device 402 is not optimal, the first PE device 403 will discard the second BSM.

102: The first PE device obtains an identifier of a second PE device according to the NG MVPN to which the multicast protocol packet belongs, and the second PE device is the PE device on which the NG MVPN is deployed.

For example, after each PE device on the provider's backbone network is configured with an NG MVPN, it will issue the MVPN auto-discovery (Auto -Discovery, AD) routing information, the MVPN AD routing information carries the NG MVPN tunnel information configured on the PE device that issues the MVPN AD routing information.

For example, if other PE devices in the provider's backbone network receive the MVPN AD routing information advertised by a PE device, other PE devices in the provider's backbone network can know that the PE device is configured with the NG MVPN. Multiple NG MVPNs can be configured on a PE. A PE device can know other PE devices configured with the same NG MVPN as the PE device in the provider's backbone network according to the received AD routing information released by other PE devices. PEs configured with the same NG MVPN on the provider backbone network are neighbor PEs. In each PE device in the provider backbone network, a corresponding relationship between the NG MVPN and the PE device's neighbor PE devices under the NG MVPN may be established.

For example, as shown in Figure 5, the PE1, PE2, PE3, and PE4 devices included in the provider's backbone network are all configured with the same NG MVPN. The PE5 and PE6 devices included in the provider's backbone network are not deployed with the NG MVPN. In the provider backbone network, PE1, PE2, PE3, and PE4 are neighbors of the NG MVPN, but PE5 is not a neighbor of PE1, PE2, PE3, or PE4 in the NG MVPN. Neither PE nor PE6 is a neighbor PE of PE1, PE2, PE3 or PE4 in the NG MVPN.

For example, PE1, PE2, PE3, and PE4 can respectively publish AD routing information to all PE devices in the provider's backbone network through the BGP protocol. The AD routing information carries NG MVPN tunnel information, and the NGMVPN Indicates the NG MVPN to which the PE that advertises AD routing information belongs to. Taking the PE1 device as an example, the PE1 device publishes the AD routing information carrying the tunnel information of the NG MVPN to all PE devices in the provider's backbone network through the BGP protocol. After PE2, PE3, and PE4 receive the AD routing information, since PE2, PE3, and PE4 are also configured with the NG MVPN, PE2, PE3, and PE4 respectively use PE1 as the The neighbor PE device of the NG MVPN. By analogy, PE1, PE2, PE3, and PE4 are neighbor PEs of the NG MVPN. However, if the NG MVPN is not configured on the PE5 and PE6 devices, they cannot serve as neighbor PE devices of the NG MVPN of the PE1, PE2, PE3 or PE4 devices.

For example, the PE1 device establishes the corresponding relationship between the NG MVPN and the PE2 device, the PE3 device, and the PE4 device. The corresponding relationship between the NG MVPN and the PE1, PE3, and PE4 devices is established in the PE2 device. The corresponding relationship between the NG MVPN and the PE1, PE2, and PE4 devices is established in the PE3 device. The corresponding relationship between the NGMVPN and the PE1 device, the PE2 device, and the PE4 device is established in the PE4 device.

For example, after receiving the multicast protocol packet, the first PE device obtains an identifier of a second PE device configured with the NG MVPN according to the NG MVPN to which the multicast protocol packet belongs, that is, The first PE device obtains a neighbor PE device of the first PE device under the NG MVPN. The identifier of the second PE device may be the serial number of the second PE device, the IP address of the second PE device, the name of the second PE device, and other information that can uniquely identify the second PE device, No more examples are given here.

103: The first PE device queries the private network unicast route from the first PE device to the second PE device according to the private network unicast routing table and the identifier of the second PE device, and the first PE device The destination address of the private network unicast route from the PE device to the second PE device is the private network IP address of the second PE device in the NG MVPN, and the private network IP address is the same as the private network IP address of the second PE device The public IP addresses are the same.

For example, after a PE device of the provider's backbone network is configured with an NG MVPN, the PE device can be configured with an interface corresponding to the NG MVPN. The interface corresponding to the NG MVPN may be configured with a private network IP address. The private network IP address is the same as the public network IP address of the PE device. The PE device publishes VPN V4 routing information to PE devices in the entire provider backbone network through BGP, and the VPN V4 routing information carries the private network IP address of the PE device in the NG MVPN. In the provider backbone network, after receiving the VPN V4 routing information released by the PE device, the neighbor PE device of the PE device under the NG MVPN obtains the VPN V4 routing information according to the private network IP address carried in the VPN V4 routing information. Private network unicast route from a neighbor PE to this PE. Wherein, the public network IP address of the PE device can be used to identify the PE device in the public network.

For example, a network device in a private network cannot obtain the public network IP address of the PE device. In order to send the multicast protocol packet to the PE device, the private network IP address of the PE device is set to be the same as the public network IP address of the PE device. In this way, the neighbor PE device of the PE device in the NG MVPN can learn the public network IP address of the PE device according to the VPN V4 routing information from the PE device.

As shown in Figure 5, specify an interface on the PE1 device to bind to the NG MVPN, configure a private network IP address for the interface bound to the NG MVPN, and the private network IP address is the same as the public network IP of the PE1 device The address is the same. The PE1 device sends VPN V4 routing information to the neighbor PE device configured with the NG MVPN through the BGP protocol, and the VPN V4 routing information carries the private network IP address of the PE1 device. After receiving the VPN V4 routing information, the PE2 device, the PE3 device and the PE4 device respectively obtain the private network IP address of the PE1 device. PE2 obtains the private network unicast route from PE2 to PE1 according to the private network IP address of PE1. PE3 and PE4 can also obtain corresponding private network unicast routes according to the method adopted by PE2. Similarly, PE1, PE2, PE3, or PE4 can obtain private network unicast routes to other neighboring devices, which will not be repeated here.

For example, the PE1 device may establish a private network unicast routing table after learning that the neighbor PE devices configured with the NG MVPN include the PE2 device, the PE3 device, and the PE4 device. The private network unicast routing table on the PE1 device includes: the private network unicast route from the PE1 device to the PE2 device, the private network unicast route from the PE1 device to the PE3 device, and the private network unicast route from the PE1 device to the PE4 device. After learning that the neighbor PE devices configured with the NG MVPN are PE1, PE3 and PE4, the PE2 device can establish a private network unicast routing table, and the private network unicast routing table on the PE2 device includes PE2 device to PE1 device The private network unicast route of the device, the private network unicast route from PE2 to PE3, and the private network unicast route from PE2 to PE4. The PE3 device can establish a private network unicast routing table after learning that the neighbor PE devices configured with the NG MVPN are the PE1 device, the PE2 device, and the PE4 device. The private network unicast routing table on the PE3 device includes: the private network unicast route from the PE3 device to the PE1 device, the private network unicast route from the PE3 device to the PE2 device, and the private network unicast route from PE3 to the PE4 device. The PE4 device can establish a private network unicast routing table after learning that all neighboring PE devices configured with the NG MVPN are the PE1 device, the PE2 device, and the PE3 device. The private network unicast routing table on PE4 includes: private network unicast routes from PE4 to PE1, private network unicast routes from PE4 to PE2, and private network unicast routes from PE4 to PE3.

104: The first PE device sends the multicast protocol packet to the second PE device in a unicast form according to the public network IP address of the second PE device.

For example, the first PE device may query the private network unicast route from the first PE device to the second PE device according to the identifier of the second PE device. The private network unicast route identified by the first PE to the second PE device includes the private network IP address of the second PE device and the identifier of the second PE device. The first PE device may acquire the private network IP address of the second PE device from the private network unicast route. The private network IP address of the second PE device is the same as the public network IP address of the second PE device. The first PE device uses the public network IP address of the second PE device to send the multicast protocol packet to the second PE device in unicast form.

Optionally, after step 101, the method provided by this embodiment of the present invention further includes: the first PE device obtains an identifier of a third PE device according to the NG MVPN to which the multicast protocol packet belongs, and the third PE device It is the PE device where the NGMVPN is deployed; the first PE device queries the connection between the first PE device and the third PE device according to the private network unicast routing table and the identifier of the third PE device Private network unicast routing, the destination address of the private network unicast route from the first PE device to the third PE device is the private network IP address of the third PE device in the NG MVPN, and the private network The IP address is the same as the public network IP address of the third PE device; the first PE device sends the Multicast protocol packets.

For example, the first PE device can also send the multicast protocol message to all PE devices configured with the NG MVPN in the provider's backbone network in unicast according to the above method, and details will not be repeated here. .

In the method provided by the embodiment of the present invention, the first PE device can send a multicast protocol message to the second PE device in a unicast manner, and the multicast data message can still be transmitted through the tunnel in the public network, realizing The separation of the transmission of the multicast protocol message and the transmission of the multicast data message helps to improve the forwarding efficiency of the multicast data message.

FIG. 6 is a flow chart of another method for transmitting multicast protocol packets provided by an embodiment of the present invention. The embodiment corresponding to FIG. 6 illustrates the method provided by the embodiment of the present invention from the side of the second PE device. The method for transmitting a multicast protocol packet provided by the embodiment of the present invention will be described below with reference to FIG. 6 .

601: The second PE device receives a multicast protocol packet sent in unicast by the first PE device, and the second PE device is configured with the NG MVPN to which the multicast protocol packet belongs.

For example, the second PE device is a neighbor PE device of the first PE device in the NG MVPN. The second PE device may be connected to the same CE as the first PE device, or may be connected to the first PE device through a provider (provider, P) device in the backbone network.

602: The second PE device performs processing according to the type of the multicast protocol packet.

For example, the multicast protocol packet is not encapsulated into a packet format supported by the specified public network tunnel. The multicast protocol message adopts the original message format of the multicast protocol message, that is, the multicast protocol message is sent from the first PE device to the second PE device in unicast form. In this way, after receiving the multicast protocol packet, the second PE device can directly identify that the received packet is a multicast protocol packet. The second PE device receives the multicast protocol message sent in the form of unicast, and can also receive the multicast data message sent in the form of a public network tunnel, that is, the second PE device can directly forward the message sent in the form of a public network tunnel Multicast data packets sent in the same way, which improves the forwarding efficiency of multicast data packets.

In a specific embodiment, the multicast protocol packet is a BSM, and the processing performed by the second PE device according to the type of the multicast protocol packet includes: the second PE device obtains from the BSM The private network IP address of the device that generates the BSM; the second PE device uses the private network IP address of the device that generates the BSM to perform an RPF check, and checks that the second PE device passes through the first PE device to the generated Whether the unicast route of the BSM device is optimal; if the unicast route from the second PE device to the device generating the BSM is optimal via the first PE device, then the second PE device sends The CE device connected to the second PE device broadcasts the BSM.

For example, if the unicast route from the second PE device to the device generating the BSM via the first PE device is not optimal, the second PE device discards the BSM.

In the method provided by the embodiment of the present invention, the second PE device can receive the multicast protocol message sent by the first PE device in a unicast manner, and the multicast data message can still be transmitted through the tunnel in the public network. The second PE device can obtain multicast protocol packets and multicast data packets according to different transmission methods, realizing the separation of multicast protocol packet transmission and multicast data packet transmission, which helps to improve the multicast data Packet forwarding efficiency.

The following describes with an example in conjunction with a specific application scenario, which is applied to a candidate bootstrapping router (Candidate-BootStrap Router, C-BSR) sending a BSM to a candidate rendezvous point (Candidate-Rendezvous Point, C-RP). As shown in FIG. 7, the C-BSR is directly connected to PE1 and PE2 respectively. PE1, PE2, PE3, and PE4 are neighbors configured with the same NG MVPN. PE3 is directly connected to a C-RP1 device, and PE4 is directly connected to a C-RP2 device.

The C-BSR generates a BSM, and broadcasts the BSM to all PIM interfaces bound to the MVPN to which the BSM belongs. The BSM carries the private network IP address of the C-BSR.

The PE1 device receives the BSM sent by the C-BSR, and performs an RPF check according to the private network IP address of the C-BSR carried in the BSM, and checks the single link between the PE1 device and the C-BSR. Whether the broadcast route is optimal. If the unicast route from the PE1 device to the C-BSR is optimal, the PE1 device uses the BSM as a multicast protocol message. If the unicast route from the PE1 device to the C-BSR is not optimal, the PE1 device discards the BSM. In this implementation scenario, since the PE1 device is directly connected to the C-BSR, the unicast route from the PE1 device to the C-BSR is optimal, and the PE1 device sends the BSM As a multicast protocol packet. The optimal unicast route may be that the path corresponding to the unicast route is the shortest, or may be other determination conditions, which will not be described one by one here.

The PE1 device determines the MVPN to which the BSM belongs according to the interface receiving the BSM. If the NG MVPN corresponding to the MVPN is configured on the PE1 device, the PE1 device queries to obtain the neighbor PE device configured with the NG MVPN, for example, the neighbor PE devices of the PE1 device are PE2 and PE3 devices and PE4 equipment.

The PE1 device may obtain a private network unicast route from the PE1 device to its neighbor PE device according to the private network unicast routing table and the identifier of the neighbor PE device of the PE1 device. For example: the destination address of the private network unicast route from the PE1 device to the PE2 device is the private network IP address of the PE2 device, and the private network IP address of the PE2 device and the public network IP address of the PE2 device same. The destination address of the private network unicast route from the PE1 device to the PE3 device is the private network IP address of the PE3 device, and the private network IP address of the PE3 device is the same as the public network IP address of the PE3 device. The destination address of the private network unicast route from the PE1 device to the PE4 device is the private network IP address of the PE4 device, and the private network IP address of the PE4 device is the same as the public network IP address of the PE4 device.

The PE1 device sends the BSM packet to the PE2 device in unicast form according to the public network IP address of the PE2 device. Similarly, the PE1 device sends the BSM message to the PE3 device in unicast form according to the public network IP address of the PE3 device. The PE1 device sends the BSM packet to the PE4 device in unicast form according to the public network IP address of the PE4 device.

Similarly, the PE2 device may send the BSM to the PE1 device, the PE3 device, and the PE4 device in unicast form.

The PE1 device may also receive the BSM sent by the PE2 device in unicast form, and the BSM of the PE2 is generated by the C-BSR. Since the PE1 is directly connected to the C-BSR, the unicast route from the PE1 to the C-BSR via the PE2 is not optimal, and the PE1 discards the BSM received from the PE2 .

Similarly, the PE2 device receives the BSM sent by the PE1 device in unicast form, and the unicast route from the PE2 device to the C-BSR via the PE1 is not optimal, and the PE2 discards the The BSM received by PE1.

PE3 receives the BSM sent by PE1 in unicast mode, and PE3 checks whether the unicast route from PE1 to the C-BSR is optimal. If the unicast route from PE3 to C-BSR via PE1 is optimal, PE3 broadcasts the BSM received from PE1 to C-RP1 connected to it. The PE3 device can also receive the BSM sent by the PE2 device in unicast form, and the PE3 device checks whether the unicast route to the C-BSR via the PE2 device is optimal. If the unicast route from the PE3 device to the C-BSR via the PE2 device is not optimal, the PE3 device discards the BSM received from the PE2 device.

Similarly, PE4 receives the BSM sent by PE1 in unicast form, and the unicast route from PE4 to the C-BSR via PE1 is not optimal, and PE4 discards the BSM received from PE1. The PE4 device receives the BSM sent by the PE2 device in unicast form, the unicast route from the PE4 device to the C-BSR via the PE2 device is optimal, and the PE4 device broadcasts the BSM received from the PE2 device to the connected C-RP2 .

According to the above BSM transmission process, C-RP1 and C-RP2 receive BSMs sent by multiple C-BSRs, and elect a BSR from multiple C-BSRs. Then each C-RP sends C-RP information to the elected BSR in the form of unicast, and the BSR obtains RP set information based on the received C-RP information. The BSR broadcasts the RP set information to all devices in the MVPN private network through the BSM, so as to realize the purpose of dynamic learning of RPs in the MVPN private network.

The above scenario examples are just to better illustrate the implementation of a method for transmitting multicast protocol packets provided by the embodiments of the present invention, and are not limited to the specific application scenarios described in the above scenario examples, and can also be applied to other Application scenarios.

FIG. 8 is a schematic structural diagram of a first PE device provided by an embodiment of the present invention. The first PE device may adopt the method provided in the embodiment corresponding to FIG. 1 . The first PE device includes: a first acquiring unit 801 , a second acquiring unit 802 , a first querying unit 803 and a first sending unit 804 .

The first acquiring unit 801 is configured to acquire multicast protocol packets.

The second obtaining unit 802 is configured to obtain an identifier of a second PE device according to the NG MVPN to which the multicast protocol packet belongs, and the second PE device is the PE device on which the NG MVPN is deployed.

The first query unit 803 is configured to query the private network unicast route from the first PE device to the second PE device according to the private network unicast routing table and the identifier of the second PE device. The destination address of the private network unicast route from a PE device to the second PE device is the private network IP address of the second PE device in the NG MVPN, and the private network IP address and the second PE device The public IP addresses of the two are the same.

The first sending unit 804 is configured to send the multicast protocol packet to the second PE device in a unicast form according to the public network IP address of the second PE device.

In an embodiment, the first PE device further includes: a third acquiring unit, a second querying unit, and a second sending unit.

The third obtaining unit is configured to obtain an identifier of a third PE device according to the NG MVPN to which the multicast protocol packet belongs, and the third PE device is the PE device on which the NG MVPN is deployed.

The second query unit is configured to query the private network unicast route from the first PE device to the third PE device according to the private network unicast routing table and the identifier of the third PE device, the The destination address of the private network unicast route from the first PE device to the third PE device is the private network IP address of the third PE device in the NG MVPN, and the private network IP address is the same as that of the third PE device The public IP addresses of the devices are the same.

The second sending unit is configured to send the multicast protocol packet to the third PE device in a unicast form according to the public network IP address of the third PE device.

In another embodiment, the first acquiring unit 801 is specifically configured to receive the first BSM sent by the first user edge CE device; the first acquiring unit 801 is specifically configured to perform an RPF check, check the first PE Whether the unicast route from the device to the CE device that generates the first BSM is optimal, and the first BSM is generated by the first CE device or the second CE device; if the first PE device generates the first BSM If the unicast route of the CE device of a BSM is optimal, the first acquiring unit 801 is specifically configured to use the first BSM as the multicast protocol packet.

In another embodiment, the first obtaining unit 801 is specifically configured to receive the second BSM sent by the third CE device, the second BSM is a BSM generated by the fourth PE device, and the second BSM includes the The private network IP address of the fourth PE device, the fourth PE device is the PE device deployed with the NG MVPN and connected to the third CE device; the first obtaining unit 801 is specifically configured to The private network IP address of the four PE devices performs an RPF check to check whether the unicast route from the first PE device to the fourth PE device via the third CE device is optimal; if the first PE device passes through the If the unicast route from the third CE device to the fourth PE device is optimal, the first obtaining unit 801 is specifically configured to use the second BSM as the multicast protocol packet.

In the first PE device provided by the embodiment of the present invention, the first PE device can send a multicast protocol message to the second PE device in a unicast manner, and the multicast data message can still be transmitted through the tunnel in the public network , realizes the separation of the transmission of the multicast protocol message and the transmission of the multicast data message, and helps to improve the forwarding efficiency of the multicast data message.

FIG. 9 is a schematic structural diagram of a second PE device provided by an embodiment of the present invention. The second PE device provided in this embodiment of the present invention may execute the method provided in the embodiment corresponding to FIG. 6 . The second PE device includes: a receiving unit 901 and a processing unit 902 .

The receiving unit 901 is configured to receive the multicast protocol packet sent by the first PE device in unicast form, and the second PE device deploys the NG MVPN to which the multicast protocol packet belongs.

The processing unit 902 is configured to perform processing according to the type of the multicast protocol packet.

In one embodiment, the processing unit 802 is specifically configured to obtain the private network IP address of the device generating the BSM from the BSM; the processing unit 802 is specifically configured to use the private network IP address of the device generating the BSM The IP address performs an RPF check to check whether the unicast route from the second PE device to the device generating the BSM via the first PE device is optimal; the processing unit 802 is specifically configured to if the second PE device The unicast route from the first PE device to the device generating the BSM is optimal, and broadcast the BSM to CE devices connected to the second PE device.

In the second PE device provided by the embodiment of the present invention, the second PE device can receive the multicast protocol message sent by the first PE device in a unicast manner, and the multicast data message can still be transmitted through the tunnel in the public network . The second PE device can obtain multicast protocol packets and multicast data packets according to different transmission methods, realizing the separation of multicast protocol packet transmission and multicast data packet transmission, which helps to improve the multicast data Packet forwarding efficiency.

Figure 10 is a schematic structural diagram of a system for transmitting multicast protocol packets provided by an embodiment of the present invention, the system includes: the first PE device 1001 shown in Figure 8, and at least one second PE device 1001 shown in Figure 9 PE device 1002. The specific structure will not be repeated here.

FIG. 11 is a schematic diagram of a hardware structure of a first PE device provided by an embodiment of the present invention. The first PE device provided in this embodiment of the present invention may execute the method provided in the embodiment corresponding to FIG. 1 . The first PE device includes: a memory 1101, a transmitter 1102, and a processor 1103 respectively connected to the memory 1101 and the receiver 1102. The memory 1101 is used to store a set of program instructions.

The processor 1103 is used to call the program instructions stored in the memory 1101 to perform the following operations:

The device obtains the multicast protocol packet;

Obtaining an identifier of a second PE device according to the NG MVPN to which the multicast protocol message belongs, where the second PE device is the PE device on which the NG MVPN is deployed;

According to the private network unicast routing table and the identifier of the second PE device, query the private network unicast route from the first PE device to the second PE device, and from the first PE device to the second PE device The destination address of the private network unicast route of the device is the private network IP address of the second PE device in the NG MVPN, and the private network IP address is the same as the public network IP address of the second PE device;

According to the public network IP address of the second PE device, the sender 1102 sends the multicast protocol message to the second PE device in a unicast form.

In one embodiment, the processor 1103 is further configured to call the program instructions stored in the memory 1101 to perform the following operations:

Obtain an identifier of a third PE device according to the NG MVPN to which the multicast protocol message belongs, where the third PE device is the PE device on which the NG MVPN is deployed;

According to the private network unicast routing table and the identifier of the third PE device, query the private network unicast route from the first PE device to the third PE device, and from the first PE device to the third PE device The destination address of the private network unicast route of the three PE devices is the private network IP address of the third PE device in the NG MVPN, and the private network IP address is the same as the public network IP address of the third PE device;

According to the public network IP address of the third PE device, the sender 1102 sends the multicast protocol packet to the third PE device in a unicast form.

In another embodiment, the processor 1103 is used to call the program instructions stored in the memory 1101 to execute and obtain the multicast protocol message including:

receiving the first BSM sent by the first user edge CE device;

Executing an RPF check to check whether the unicast route from the first PE device to the CE device that generates the first BSM is optimal, the first BSM is generated by the first CE device or the second CE device;

If the unicast route from the first PE device to the CE device generating the first BSM is optimal, use the first BSM as the multicast protocol packet.

In another embodiment, the processor 1103 is used to call the program instructions stored in the memory 1101 to execute and obtain the multicast protocol message including:

receiving a second BSM sent by the third CE device, the second BSM is a BSM generated by a fourth PE device, the second BSM includes the private network IP address of the fourth PE device, and the fourth PE device is A PE device on which the NG MVPN is deployed and connected to the third CE device;

performing an RPF check according to the private network IP address of the fourth PE device, and checking whether the unicast route from the first PE device to the fourth PE device via the third CE device is optimal;

If the unicast route from the first PE device to the fourth PE device via the third CE device is optimal, use the second BSM as the multicast protocol packet.

In the first PE device provided by the embodiment of the present invention, the processor can send a multicast protocol message to the second PE device in a unicast manner, and the multicast data message can still be transmitted through the tunnel in the public network, realizing The transmission of the multicast protocol message and the transmission of the multicast data message are separated, which helps to improve the forwarding efficiency of the multicast data message.

FIG. 12 is a schematic diagram of a hardware structure of a second PE device provided by an embodiment of the present invention. The second PE device provided in the embodiment of the present invention may adopt the method provided in the embodiment corresponding to FIG. 6 . The second PE device includes: a receiver 1201, a memory 1202, and a processor 1203 respectively connected to the receiver 1201 and the memory 1202. The memory 1202 is used to store a set of program instructions.

The receiver 1201 is configured to receive the multicast protocol packet sent by the first PE device in unicast form, and the second PE device is configured with the NG MVPN to which the multicast protocol packet belongs.

The processor 1203 is configured to call the program instructions stored in the memory 1202 to perform the following operations: perform processing according to the type of the multicast protocol packet.

In one embodiment, the processor 1203 is used to call the program instructions stored in the memory 1202 to perform processing according to the type of the multicast protocol message including:

Obtain the private IP address of the device that generates the BSM from the BSM;

Using the private network IP address of the device generating the BSM to perform an RPF check to check whether the unicast route from the second PE device to the device generating the BSM via the first PE device is optimal;

If the unicast route from the second PE device to the device generating the BSM via the first PE device is optimal, broadcast the BSM to CE devices connected to the second PE device.

In the second PE device provided by the embodiment of the present invention, the processor can receive the multicast protocol message sent by the first PE device in a unicast manner, and the multicast data message can still be transmitted through the tunnel in the public network. The second PE device can obtain multicast protocol packets and multicast data packets according to different transmission methods, realizing the separation of multicast protocol packet transmission and multicast data packet transmission, which helps to improve the multicast data Packet forwarding efficiency.

Fig. 13 is a schematic diagram of the hardware structure of a system for transmitting multicast protocol packets provided by an embodiment of the present invention. The system includes: the first PE device 1301 shown in Fig. 11 , and at least one second PE device 1302.

The aforementioned processor may be a microprocessor or the processor may be any conventional processor. The steps of the methods disclosed in the embodiments of the present invention may be directly implemented by a hardware processor, or implemented by a combination of hardware and software modules in the processor. When implemented in software, codes for realizing the functions described above can be stored in a computer-readable medium. Computer-readable media includes computer storage media. A storage media may be any available media that can be accessed by a computer. Take this as an example but not limited to: the computer readable medium can be random access memory (full name in English is random access memory, English abbreviation is RAM), read-only memory (full name in English is read-only memory, English abbreviation is ROM), Electrically Erasable Programmable Read-Only Memory (English full name is electrically erasableprogrammable read-only memory, English abbreviation is EEPROM), read-only CD (English full name is compactdisc read-only memory, English abbreviation is CD-ROM) or other optical disc storage, Disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store program code in the form of instructions or data structures and can be accessed by a computer. The computer-readable medium may be a compact disc (compact disc in English, abbreviated as CD in English), laser disc, digital video disc (digital video disc in English, abbreviated as DVD in English), floppy disk or Blu-ray disc.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them; although the present invention and the beneficial effects brought by the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art Those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the present invention Scope of Claims.

Claims (13)

1. a kind of method for being used for transmission multicast protocol message, which is characterized in that the described method includes:

First Provider Edge PE equipment obtains multicast protocol message；

The first PE equipment next-generation multicasting virtual private network NG MVPN according to belonging to the multicast protocol message is obtained The mark of 2nd PE equipment, the 2nd PE equipment are to deploy the PE equipment of the NG MVPN；

The first PE equipment inquires the first PE equipment according to the mark of private network unicast routing table and the 2nd PE equipment To the private network singlecast router of the 2nd PE equipment, the private network singlecast router of the first PE equipment to the 2nd PE equipment Destination address be the 2nd PE equipment the NG MVPN private network internet protocol address, the private network IP address with The public network IP address of the 2nd PE equipment is identical；

The first PE equipment is according to the public network IP address of the 2nd PE equipment, to the 2nd PE equipment in the form of unicast Send the multicast protocol message.

2. the method according to claim 1, wherein the method also includes:

First PE equipment NG MVPN according to belonging to the multicast protocol message obtains the mark of the 3rd PE equipment, described 3rd PE equipment is to deploy the PE equipment of the NG MVPN；

The first PE equipment inquires the first PE according to the mark of the private network unicast routing table and the 3rd PE equipment Private network singlecast router of the equipment to the 3rd PE equipment, the first PE equipment to the private network unicast road of the 3rd PE equipment By destination address be private network IP address of the 3rd PE equipment in the NG MVPN, the private network IP address and described the The public network IP address of three PE equipment is identical；

The first PE equipment is according to the public network IP address of the 3rd PE equipment, to the 3rd PE equipment in the form of unicast Send the multicast protocol message.

3. method according to claim 1 or 2, which is characterized in that the first PE equipment obtains multicast protocol message packet It includes:

The first PE equipment receives the first Bootstrap message BSM that the first customer edge CE equipment is sent；

The first PE equipment executes reverse path and forwards rpf check, checks the first PE equipment to generation the first BSM CE equipment singlecast router it is whether optimal, the first BSM is generated by the first CE equipment or the 2nd CE equipment；

If the singlecast router of the first PE equipment to the CE equipment for generating the first BSM is optimal, the first PE equipment Using the first BSM as the multicast protocol message.

4. method according to claim 1 or 2, which is characterized in that the first PE equipment obtains multicast protocol message packet It includes:

The first PE equipment receives the 2nd BSM that the 3rd CE equipment is sent, and the 2nd BSM is that the 4th PE equipment generates BSM, the 2nd BSM include the private network IP address of the 4th PE equipment, and the 4th PE equipment is to deploy the NG MVPN and the PE equipment being connected with the 3rd CE equipment；

The first PE equipment executes rpf check according to the private network IP address of the 4th PE equipment, checks that the first PE is set It is standby whether optimal via the singlecast router of the 3rd CE equipment to the 4th PE equipment；

If the first PE equipment is optimal via the singlecast router of the 3rd CE equipment to the 4th PE equipment, described One PE equipment is using the 2nd BSM as the multicast protocol message.

5. a kind of method for being used for transmission multicast protocol message, which is characterized in that the described method includes:

Public network IP address of the second Provider Edge PE equipment based on the 2nd PE equipment receives the first PE equipment with unicast shape The multicast protocol message that formula is sent, next-generation multicast virtual belonging to the 2nd PE device configuration multicast protocol message Private network NG MVPN；Wherein, the private network internet protocol of the public network IP address and the 2nd PE equipment in the NG MVPN View IP address is identical, and the private network IP address is the mesh of private network singlecast router of the first PE equipment to the 2nd PE equipment Address, the private network singlecast router is by the first PE equipment according to the mark of private network unicast routing table and the 2nd PE equipment Know inquiry to obtain；

The 2nd PE equipment executes processing according to the type of the multicast protocol message.

6. according to the method described in claim 5, it is characterized in that, the multicast protocol message is Bootstrap message BSM, described the Two PE equipment are handled according to the type execution of the multicast protocol message

The 2nd PE equipment obtains the private network internet protocol address for generating the equipment of the BSM from the BSM；

The private network IP address that the 2nd PE equipment utilization generates the equipment of the BSM executes reverse path forwarding rpf check, inspection Whether the singlecast router for looking into the 2nd PE equipment via the first PE equipment to the equipment for generating the BSM is optimal；

If the 2nd PE equipment is optimal via the singlecast router of the first PE equipment to the equipment for generating the BSM, institute The 2nd PE equipment is stated to BSM described in the CE device broadcasts being connected with the 2nd PE equipment.

7. a kind of first Provider Edge PE equipment, which is characterized in that the first PE equipment includes:

First acquisition unit, for obtaining multicast protocol message；

Second acquisition unit is obtained for the next-generation multicasting virtual private network NG MVPN according to belonging to the multicast protocol message The mark of the 2nd PE equipment is obtained, the 2nd PE equipment is to deploy the PE equipment of the NG MVPN；

First query unit inquires the first PE for the mark according to private network unicast routing table and the 2nd PE equipment Private network singlecast router of the equipment to the 2nd PE equipment, the first PE equipment to the private network unicast road of the 2nd PE equipment By destination address be private network internet protocol address of the 2nd PE equipment in the NG MVPN, the private network IP Location is identical as the public network IP address of the 2nd PE equipment；

First transmission unit, for the public network IP address according to the 2nd PE equipment, to the 2nd PE in the form of unicast Equipment sends the multicast protocol message.

8. the first PE equipment according to claim 7, which is characterized in that the first PE equipment further include:

Third acquiring unit obtains the mark of the 3rd PE equipment for the NG MVPN according to belonging to the multicast protocol message, The 3rd PE equipment is to deploy the PE equipment of the NG MVPN；

Second query unit inquires described for the mark according to the private network unicast routing table and the 3rd PE equipment Private network singlecast router of the one PE equipment to the 3rd PE equipment, the private network list of the first PE equipment to the 3rd PE equipment The destination address for broadcasting routing is private network IP address of the 3rd PE equipment in the NG MVPN, the private network IP address and institute The public network IP address for stating the 3rd PE equipment is identical；

Second transmission unit, for the public network IP address according to the 3rd PE equipment, to the 3rd PE in the form of unicast Equipment sends the multicast protocol message.

9. the first PE equipment according to claim 7 or 8, which is characterized in that

The first acquisition unit is specifically used for receiving the first Bootstrap message BSM that the first customer edge CE equipment is sent；

The first acquisition unit is specifically used for executing reverse path forwarding rpf check, checks the first PE equipment to generation Whether the singlecast router of the CE equipment of the first BSM is optimal, and the first BSM is set by the first CE equipment or the 2nd CE It is standby to generate；

If the singlecast router of the first PE equipment to the CE equipment for generating the first BSM is optimal, described first obtains list Member is using the first BSM as the multicast protocol message.

10. the first PE equipment according to claim 7 or 8, which is characterized in that

The first acquisition unit is specifically used for receiving the 2nd BSM that the 3rd CE equipment is sent, and the 2nd BSM is that the 4th PE is set The standby BSM generated, the 2nd BSM includes the private network IP address of the 4th PE equipment, and the 4th PE equipment is to deploy The NG MVPN and the PE being connected with the 3rd CE equipment；

The first acquisition unit is specifically used for executing rpf check according to the private network IP address of the 4th PE equipment, checks institute Whether the singlecast router for stating the first PE equipment via the 3rd CE equipment to the 4th PE equipment is optimal；

If the first PE equipment is optimal via the singlecast router of the 3rd CE equipment to the 4th PE equipment, described One acquiring unit is specifically used for using the 2nd BSM as the multicast protocol message.

11. a kind of second Provider Edge PE equipment, which is characterized in that the 2nd PE equipment includes:

Receiving unit is sent for receiving public network IP address of the first PE equipment based on the 2nd PE equipment with unicast fashion Multicast protocol message, next-generation multicasting virtual private network belonging to the 2nd PE deployed with devices multicast protocol message NG MVPN；Wherein, the private network Internet protocol IP of the public network IP address and the 2nd PE equipment in the NG MVPN Location is identical, and the private network IP address is the destination of private network singlecast router of the first PE equipment to the 2nd PE equipment Location, the private network singlecast router are looked by the first PE equipment according to the mark of private network unicast routing table and the 2nd PE equipment Inquiry obtains；

Processing unit, for executing processing according to the type of the multicast protocol message.

12. the 2nd PE equipment according to claim 11, which is characterized in that the multicast protocol message is Bootstrap message BSM,

The processing unit is specifically used for the private network Internet protocol IP for the equipment for generating the BSM is obtained from the BSM Location；

The processing unit is specifically used for executing reverse path forwarding RPF using the private network IP address for the equipment for generating the BSM Check, check the 2nd PE equipment via the equipment of the first PE equipment to the generation BSM singlecast router whether most It is excellent；

If the 2nd PE equipment is optimal via the singlecast router of the first PE equipment to the equipment for generating the BSM, institute Processing unit is stated to BSM described in the CE device broadcasts being connected with the 2nd PE equipment.

13. a kind of system for being used for transmission multicast protocol message, which is characterized in that the system comprises:

First PE equipment described in preceding claims 7-10 any one and preceding claims 11-12 any one institute The 2nd PE equipment stated.