CN101667956B - Method, device and system for PBB-TE path management - Google Patents

Abstract

The embodiment of the present invention discloses a method and system for controlling a PBB-TE connection, wherein the method includes the steps of: receiving a request for establishing a PBB-TE path connection, querying link state information in the Ethernet; establishing a PBB-TE path according to the The connection request and the link state information calculate and establish the routing information of the PBB-TE path connection; send the routing information to the edge network bridge in the Ethernet, and the routing information is used to instruct the edge network bridge to establish the PBB-TE path connection. TE path. Adopting the embodiment of the present invention only needs to send a routing information to the edge network bridge of ESP, just automatically establishes a PBB-TE path between the ingress and egress bridges of ESP, so that Ethernet can provide the service with QOS guarantee for the user, And can realize traffic engineering.

Description

Method, device and system for PBB-TE path management

technical field

The present invention relates to the communication field, in particular to a method, device and system for PBB-TE path management on the Ethernet.

Background technique

In the traditional Ethernet bridge interconnected network, the forwarding of user data packets is realized in a connectionless way, that is, spanning tree, and spanning tree is a pruned topology of a bridged network, so that the bridged network Some links are blocked, so that network topology resources cannot be effectively utilized, and traffic engineering services cannot be provided.

In addition, there is also a control system in the prior art, which is to expand the current traditional Ethernet Layer 2 control protocols such as LLDP, etc., and adopts a control method of centralized establishment and maintenance of network topology. The system server is used to receive the request for establishing a PBB-TE (Provider Backbone Network Bridging-Traffic Engineering) path, and query the link status information between the corresponding bridge and the adjacent bridge through the Link Management Entity (LME). Calculate a simple forwarding route, and then send a label registration use request to the LME on each bridge connected by the PBB-TE path through the configured signaling channel. After receiving the label registration use request sent by the CCE, each LME , configure the forwarding path information of its corresponding bridge, that is, directly configure the forwarding table entries of each bridge connected to the PBB-TE path through the LME; when the relevant LME receives the tag registration release request issued by the server, delete its corresponding Forwarding entries releases network resources connected to PBB-TE trails. When such a system establishes or releases a PBB-TE path connection, it needs to configure forwarding tables and network resources for each network bridge respectively, which increases the calculation burden of the system and the difficulty of managing multiple network bridges.

Contents of the invention

Embodiments of the present invention provide a method, device, and system for PBB-TE path management. The routes between bridges are calculated in a centralized manner. It is not necessary to configure forwarding tables and resources for each bridge in the switching path. The edge bridge of the Ethernet switching path (ESP) sends routing information, and the edge bridge establishes the PBB-TE path.

According to an aspect of the present invention, an embodiment provides a PBB-TE path management method, which includes:

Receive the request to establish a PBB-TE path connection, and query the link status information in the Ethernet;

calculating routing information for establishing a PBB-TE path connection according to the request for establishing a PBB-TE path connection and the link state information;

Send the routing information to the edge bridge in the Ethernet, where the routing information is used to instruct the edge bridge to establish a PBB-TE path.

According to another aspect of the present invention, the embodiment also provides a PBB-TE path management device, which includes:

A connection control module, configured to receive a request for establishing a PBB-TE path connection;

A routing control module, configured to calculate routing information for establishing a PBB-TE path connection according to a request for establishing a PBB-TE path connection and Ethernet link state information, and transmit the routing information to the connection control module;

Wherein, the connection control module is further configured to send the routing information to the edge bridge in the Ethernet, and the routing information is used to instruct the edge bridge to establish a PBB-TE path.

According to still another aspect of the present invention, the embodiment also provides a PBB-TE path management system, which includes:

The server is configured to receive a request for establishing a PBB-TE path connection, calculate routing information for establishing a PBB-TE path connection according to the request for establishing a PBB-TE path connection and link state information, and send the route information to the edge bridge in the Ethernet the routing information;

The edge bridge is configured to receive the routing information, and establish a PBB-TE path connection according to the routing information.

By adopting a method, device and system for PBB-TE path management provided by the embodiments of the present invention, the network topology can be established and maintained in a centralized manner, and the routes between bridges connecting endpoints can be calculated in a centralized manner, without having to perform forwarding tables and resources for each bridge respectively. and other configurations, but only need to send a routing message to the edge bridge of the Ethernet switch path (ESP), and the edge bridge will establish the PBB-TE path, so that the traffic engineering can be realized conveniently and simply in the Ethernet.

Description of drawings

FIG. 1 is a flow chart of a PBB-TE path management method provided by Embodiment 1 of the present invention;

Fig. 2 is the first embodiment flowchart of step 103 in Fig. 1 method;

Fig. 3 is a first embodiment network topology diagram of step 103 in the method of Fig. 1;

Fig. 4 is the second embodiment flowchart of step 103 in Fig. 1 method;

Fig. 5 is a schematic diagram of the network topology of the second embodiment of step 103 in the method of Fig. 1;

6 is a flow chart of sending the routing information to the edge bridge in the Ethernet in the method provided by Embodiment 2 of the present invention, and instructing the edge bridge to establish a PBB-TE path;

7 is a schematic diagram of a network topology in which the routing information is sent to the edge bridge in the Ethernet in the method provided by Embodiment 2 of the present invention, and instructs the edge bridge to establish a PBB-TE path;

8 is a flow chart of sending the routing information to the edge bridge in the Ethernet in the method provided by Embodiment 3 of the present invention, and instructing the edge bridge to establish a PBB-TE path;

FIG. 9 is a schematic structural diagram of a PBB-TE path management device provided in Embodiment 4 of the present invention;

FIG. 10 is a schematic structural diagram of a PBB-TE path management system provided in Embodiment 5 of the present invention;

FIG. 11 is a schematic diagram of the network topology of the PBB-TE path management system provided by Embodiment 5 of the present invention.

Detailed ways

In order to make the present invention easier to understand, the present invention will be further described below in conjunction with the drawings, but the embodiments in the drawings do not constitute any limitation to the present invention.

As shown in Figure 1, a method for PBB-TE path management provided by Embodiment 1 of the present invention includes the following steps:

Step 101: Receive a request for establishing a PBB-TE path connection, and query link state information in the Ethernet.

When there is a data flow that needs to establish a PBB-TE path forwarding on the Ethernet, the server receives the request for establishing a PBB-TE path connection sent by the Ethernet management system or the upper layer application layer of the Ethernet, and uses the Ethernet layer 2 control protocol, such as LLDP (Link Layer Discovery Protocol, Link Layer Discovery Protocol) queries the link state information between multiple bridges in the Ethernet.

Step 102. Calculate routing information for establishing a PBB-TE path connection according to the request for establishing a PBB-TE path connection and the link state information.

The server calculates routing information for establishing a PBB-TE path connection according to the request for establishing a PBB-TE path connection and the link state information, and the routing information includes information brought in from the source ingress bridge of the forwarding path to the destination egress bridge Explicit routing information for /out ports, and MSRP (Resource Registration Protocol) messages to establish the required Ethernet switching paths.

The granularity of the explicit routing information is divided into two situations, one is specific to the outgoing port information of each bridge, such as {node1: porta; node2: portb; node3: portb; node4: porta; node5}; another The second type is only specific to the address information of each bridge, such as {node1; node2; node3; node4; node5}.

Step 103: Send the routing information to the edge bridge in the Ethernet, where the routing information is used to instruct the edge bridge to establish a PBB-TE path.

Step 104, when the forwarding data stream needs to be terminated, when the server receives the release PBB-TE path connection request, it sends a release PBB-TE path connection request to any bridge on the PBB-TE path in the Ethernet, and centrally controls multiple A bridge disconnects the PBB-TE trail connection.

For example, when the source ingress bridge first receives the request for releasing the PBB-TE path connection, it generates an initiator MAD_Leave announcement message and transmits it to the destination egress bridge along the route, notifying each bridge along the way to release the PBB-TE path; when the destination egress bridge first receives the release PBB-TE path connection request, it generates a receiver MAD_Leave announcement message and transmits it to the source ingress bridge along the route, notifying each bridge along the way to release the PBB-TE TE path.

As shown in Figure 2 and Figure 3, step 103 in the method of the first embodiment above can be implemented in different manners, as a first implementation manner, when the source-entry bridge in the Ethernet receives the routing information, its The processing flow is as follows:

Step 201. The source-entry bridge receives the routing information, generates a first connection announcement signaling message, and sends the first connection announcement signaling message to the downstream network along the route (in the direction of the solid arrow in the figure). bridge teleportation.

Specifically, when the source ingress bridge 1, that is, the edge ingress bridge, receives the routing information, it generates the first connection announcement signaling message according to the explicit routing information contained in the routing information, that is, the initiator announcement MAD_Join message, the initiator declares that the MAD_Join message is a MSRP (Resource Registration Protocol) message, including data flow ID, applicant ID, direction identifier, announcement type, TSpec, cumulative delay, data frame parameters, data frame priority, rank, and can also contain failure information. The data stream ID is composed of a MAC address associated with the initiator bridge plus an integer, where the integer is used to identify different streams sent by the same initiator bridge; the applicant ID is used to match different streams of the same port. The MSRP announcement message sent out at any time, the applicant ID is composed of the MAC address of the bridge sending the announcement and an integer, the integer is used to distinguish different applicants on the same MAC address, and the applicant ID is required to be unique on the same LAN. The data flow ID requires the same bridge network to be unique; the direction identifier is used to identify whether the announcement is an initiator bridge announcement or a receiver bridge announcement; the TSpec is a transmission specification parameter describing a flow, including bandwidth and frame rate; The data frame parameters are used by the bridge to generate Reserved Address Registration Entries (Reserved Address Registration Entries), which are composed of destination addresses and vlan identifiers; Rank is used to indicate the importance of the flow.

The explicit routing is for a connection, and the explicit routing gives the information of the hops passed by the connection and the conditions satisfied by the hops passed by the connection, for example, the explicit routing gives the information of all the hops passed by the connection. When the explicit route is specific to the egress port of each bridge, the source ingress bridge 1 sends the initiator announcement MAD_Join message to the downstream intermediate bridge from the egress port specified by the explicit route.

Step 202, when the downstream intermediate bridge receives the first connection announcement signaling message, record the relevant data flow information, and add its own receiving port and MAC address information to the first connection announcement signaling message, and then Continue forwarding to the downstream bridge along the route until reaching the destination egress bridge.

The downstream intermediate bridge (2, 3, 4) generates an entry in its registrar announcement database (Registrar Declaration List) after receiving the MAD_Join message announced by the initiator, and records relevant information, such as the data flow ID, Applicant ID, Direction ID, Announcement Type, TSpec, Accumulated Delay, Data Frame Parameters, Data Frame Priority, Rank, etc. In addition, the port receiving the initiator announcement MAD_Join message and the MAC address of its own bridge are added to the initiator announcement MAD_Join message, and then forwarded to the next bridge in the explicit route until the destination egress bridge.

Step 203: When the destination egress bridge receives the sequentially modified first connection announcement signaling message, record the MAC address and sending port of the relevant upstream bridge, and generate a second connection announcement signaling message, Return to the upstream network bridge according to the original route (in the direction of the dotted arrow in the figure).

When the destination egress bridge 5 receives the MAD_Join message announced by the initiator, it generates the second connection announcement signaling message, that is, the receiver announces the MSRP message, which includes the data flow ID, the applicant ID, the direction identifier, the announcement type, TSpec and Cumulative delay and other information. The destination egress bridge 5 sends the recipient announcement MSRP message to the upstream bridge through the original path from the port that has received the same data flow ID.

Step 204, the intermediate bridges (2, 3, 4) that have received the second connection announcement signaling message perform resource reservation according to the announcement signaling message, and add the resource reservation result to the second connection announcement signaling message, and then continue to return to the upstream bridge according to the original route until the source ingress bridge.

Step 205: After the source ingress bridge 1 receives the sequentially modified second connection announcement signaling message, it judges whether the entire network resources are reserved successfully according to the resource reservation results of each downstream bridge, and if so, then A PBB-TE path is established to transmit related data streams.

As shown in FIG. 4 and FIG. 5 , it is the second implementation manner of step 103 in the method of the first embodiment above. When the destination egress bridge in the Ethernet receives the routing information, its processing flow is as follows:

Step 301, the destination egress bridge 5 receives the routing information, generates a first connection announcement signaling message, and transmits it to the upstream bridge along the route;

Step 302, when the upstream intermediate bridge (2, 3, 4) receives the first connection announcement signaling message, record the relevant data flow information, and add its own receiving port and MAC address information to the first connection Announce the signaling message, and then continue forwarding to the upstream bridge until the source ingress bridge;

Step 303: When the source ingress bridge 1 receives the sequentially modified first connection announcement signaling message, record the MAC address and sending port of the relevant upstream bridge, and generate a second connection announcement signaling message , return to the downstream bridge according to the original route;

Step 304, the intermediate bridges (2, 3, 4) that have received the second connection announcement signaling message perform resource reservation according to the announcement signaling message, and add the resource reservation result to the second connection announcement In the signaling message, then continue to return to the downstream bridge according to the original route, until the destination egress bridge 5;

Step 305, after the destination egress bridge 5 receives the sequentially modified second connection announcement signaling message, judge whether the entire network resource is reserved successfully according to the resource reservation results of each upstream bridge, and if so, then A PBB-TE path is established to transmit related data streams.

Compared with the first implementation mode, the second implementation mode of step 103 in the first method of the above-mentioned embodiment, the generated first connection announcement signaling message and the second connection announcement signaling message are the same, and both use the reserved The multicast address of MSRP is used as the destination MAC address of the announcement signaling message, the difference is that the edge bridges that first receive the routing information are different, and the directions for transmitting the first or second connection announcement signaling messages are different. Same. The first connection announcement signaling message and the second connection announcement signaling message in this embodiment are just examples, and may also contain different content in other embodiments, or instead of the initiator declaring the MAD_Join message and the receiver declaring the MSRP message, As long as it can be used to establish a path according to the routing message.

By adopting the PBB-TE path management method provided by Embodiment 1 of the present invention, the network topology can be established and maintained in a centralized manner, and the routes between bridges connecting endpoints can be calculated in a centralized manner. It is not necessary to configure forwarding tables, resources, etc. for each bridge separately, and It only needs to send a routing information on the edge bridge of the Ethernet switching path (ESP), and use signaling to automatically establish a forwarding path between the bridges connecting the endpoints for the data flow, so that the data flow in the Ethernet is manageable. Enable Ethernet to provide users with quality of service (QoS, Quality of Service) guarantees, and enable traffic engineering to be implemented conveniently and simply in Ethernet.

As shown in FIG. 6 and FIG. 7 , the PBB-TE path management method provided by Embodiment 2 of the present invention is different from the method in Embodiment 1 above only in step 103 . In the method of Embodiment 2, when the granularity of the explicit routing information is specific to the MAC address of each network bridge, when each network bridge forwards the first connection announcement signaling message, it passes through its own other than the receiving port The port sends the first connection announcement signaling message to the adjacent bridge, and after receiving the first connection announcement signaling message, all adjacent bridges compare whether their own MAC addresses are the same as the explicit route in the message, and if they are the same, further process , otherwise discard. The specific steps of establishing the PBB-TE path according to the routing information of the edge network bridge described in the second embodiment are as follows:

Step 401. When the source ingress bridge 1 receives the routing information, it generates a first connection announcement signaling message, and sends the first connection announcement signaling message to an adjacent bridge through its own port except the receiving port.

Step 402, the intermediate bridge (2, 3, 4) that has received the first connection announcement signaling message compares its own MAC address with the explicit route in the first connection announcement signaling message, and if they are the same , then record the relevant information, and add its own receiving port and MAC address information to the first connection announcement signaling message, and then continue to forward to the adjacent bridge through its own other ports except the receiving port; if not the same , then the first connection announcement signaling message is discarded; for example, the bridges 8 and 6 in the figure discard the first connection announcement signaling message and no longer forward it.

Step 403, when the destination egress bridge 5 receives the sequentially modified first connection announcement signaling message, record the relevant upstream bridge MAC address and sending port, and generate a second connection announcement signaling message, through The receiving port sends the second connection announcement signaling message to the upstream network bridge.

Step 404: The intermediate bridges (2, 3, 4) that have received the second connection announcement signaling message perform resource reservation according to the announcement signaling message, and add the resource reservation result to the second connection announcement In the signaling message, continue to return the modified second connection announcement signaling message to the upstream network bridge according to the original route until the source entry bridge 1 .

Step 405: After the source ingress bridge 1 receives the sequentially modified second connection announcement signaling message, it judges whether the entire network resources are reserved successfully according to the resource reservation results of each downstream bridge, and if so, then A PBB-TE path is established to transmit related data streams.

As an implementation manner, when the destination egress bridge first receives the routing information issued by the server, the destination egress bridge generates the first connection announcement signaling message, and communicates to the adjacent The bridge sends the first connection announcement signaling message. The intermediate bridge that receives the first connection announcement signaling message compares and judges its own MAC address with the explicit route in the first connection announcement signaling message, and if they are the same, records the relevant information, and at the same time records the information received by itself. Port and MAC address information are added to the first connection announcement signaling message, and then continue to forward to the adjacent bridge through other ports except the receiving port, until the source entry bridge; if not the same, then discard all The first connection announcement signaling message. When the source ingress bridge receives the first connection announcement signaling message, it generates a second connection announcement signaling message and sends it to the destination egress bridge, and finally the destination egress bridge judges whether the entire network resource is reserved success.

Using the PBB-TE path management method provided in Embodiment 2 of the present invention, the upstream network bridge may not consider the direction of forwarding the first connection announcement signaling message, but judge the first connection through the network bridge received downstream Announce whether the signaling message is forwarded by itself, flexibly use signaling to automatically establish a forwarding path between the bridges connecting the endpoints for the data flow, so that the data flow in the Ethernet can be managed, and the Ethernet can provide users with quality of service (QoS, Quality of Service) guarantee, so that traffic engineering can be realized conveniently and simply in Ethernet.

As shown in Figure 8, the PBB-TE path management method provided by Embodiment 3 of the present invention is only different in step 103 compared with the methods of Embodiment 1 and Embodiment 2 above. In the method of Embodiment 3, The source ingress bridge uses the unicast MAC address of the next-hop bridge in the explicit route as the destination address of the first connection announcement signaling message, and sends it to the adjacent bridge through its own ports except the receiving port. The first connection announcement signaling message. The specific steps of establishing the PBB-TE path by the edge network bridge according to the routing information in the third embodiment are as follows:

Step 501, when the source-entrance bridge receives the routing message, the generated first connection announcement signaling message adopts the unicast MAC address of the next-hop bridge in the explicit routing as the destination MAC address of its own frame , and send the first connection announcement signaling message to the adjacent bridge through its own port other than the receiving port.

Step 502: The intermediate bridge that has received the first connection announcement signaling message compares its own MAC address with the destination MAC address of the first connection announcement signaling message frame, and if they are the same, record the relevant data flow information , while adding its own receiving port and MAC address information to the first connection announcement signaling message, and then continue to forward to the adjacent bridge through its own other ports except the receiving port; if not the same, discard the A first connection announcement signaling message.

Step 503, when the destination egress bridge receives the sequentially modified first connection announcement signaling message, record the MAC address and sending port of the relevant upstream bridge, and generate a second connection announcement signaling message, by receiving The port sends the second connection announcement signaling message to the upstream network bridge.

Step 504: The intermediate bridge that receives the second connection announcement signaling message performs resource reservation according to the announcement signaling message, and adds the resource reservation result to the second connection announcement signaling message, and then continues Returning the modified second connection announcement signaling message to the upstream bridge according to the original route until the source ingress bridge.

Step 505: After the source ingress bridge receives the sequentially modified second connection announcement signaling message, it judges whether the entire network resource is reserved successfully according to the resource reservation results of each upstream bridge, and if so, establishes A PBB-TE path is set up to transmit related data streams.

The PBB-TE path management method provided by Embodiment 3 of the present invention is to use the next-hop bridge MAC in the explicit route as the destination address of the first connection announcement signaling message, that is, when the granularity of the explicit route information is only specific When reaching each network bridge, the unicast address may be used as the destination address of the first connection announcement signaling message. By comparing whether the MAC address of the bridge receiving the first connection announcement signaling message is the same as the destination address of the frame, unicast frames with unknown destination addresses are filtered out, thus avoiding the flooding phenomenon of forwarding the first connection announcement signaling message , this feature can be used to block unicast announcement frames.

As shown in Figure 9, Embodiment 4 of the present invention also provides a PBB-TE path management device, including:

The connection control module 601 is configured to receive a request for establishing a PBB-TE path connection; it is also configured to receive a request for releasing a PBB-TE path connection, and send a request for releasing a PBB-TE path connection to any bridge on the path in the Ethernet , to centrally control multiple network bridges to disconnect the PBB-TE path connection.

The route control module 602 is used to calculate and establish the routing information of the PBB-TE path connection according to the establishment of the PBB-TE path connection request and the Ethernet link state information, and transmit the routing information to the connection control module;

Wherein, the connection control module 601 is further configured to send the routing information to the edge bridge in the Ethernet, and instruct the edge bridge to establish a PBB-TE path.

The above-mentioned connection control module 601 may be a connection control entity CCE, and the routing control module 602 may be a routing control entity RCE. Both the routing control entity RCE and the connection control entity CCE are centralized control entities and can be set in the same server.

Embodiment 4 of the present invention also provides a PBB-TE path management device. By using the modules for centralized establishment and maintenance of network topology and centralized calculation of routing, it is not necessary to configure forwarding tables and resources for each bridge separately. The edge bridge of the Ethernet switching path (ESP) sends a routing information, and uses signaling to automatically establish a forwarding path between the bridges connecting the end points for the data flow, so that the data flow in the Ethernet is manageable.

As shown in Figure 10, Embodiment 5 of the present invention also provides a PBB-TE path management system, including:

The server 701 is configured to receive a request for establishing a PBB-TE path connection, calculate routing information for establishing a PBB-TE path connection according to the request for establishing a PBB-TE path connection and link state information, and send the routing information to the edge bridge in the Ethernet The routing information; the server 701 also sends a request to release the PBB-TE path connection to any bridge on the PBB-TE path in the Ethernet, and controls the bridge to release the PBB-TE path;

The edge bridge 702 is configured to receive the routing information, and establish a PBB-TE path connection according to the routing information.

Wherein the edge network bridge 702 also includes a corresponding link management module 7021, which is used to manage each corresponding edge network bridge, and obtain link information between the network bridges in the Ethernet through the Ethernet Layer 2 control protocol, According to the obtained link information, it establishes and maintains the Ethernet network topology in a centralized manner. As an implementation manner, the link management module is a link management entity LME, which is a distributed control entity that directly controls a single network bridge, and can be embedded in a corresponding network bridge device, or set separately from the corresponding network bridge device.

As shown in FIG. 11 , a signaling channel is configured between the server and the edge bridge for exchanging and transmitting information between them. The signaling channel is provided through a specific virtual local area network (VLAN).

Using the PBB-TE path management system provided in Embodiment 5, since the PBB-TE path connection is established in a Layer 2 network environment without spanning tree by using explicit routing, and this connection has a corresponding resource reservation function, it is unnecessary The data control of the spanning tree is removed, so by sending the routing information to the edge bridge, it will be more flexible and simple to control the establishment of the PBB-TE path connection. Two bridge nodes can be established between the two bridge nodes in the network. or multiple connections to realize traffic engineering; and the operating cost of network equipment is greatly reduced.

The above description is only a preferred embodiment of the present invention, and of course the scope of rights of the present invention cannot be limited by this. It should be pointed out that for those of ordinary skill in the art, they can also Several improvements and changes are made, and these improvements and changes are also regarded as the protection scope of the present invention.

Claims (10)

1. A method for operator backbone network bridging-traffic engineering PBB-TE path management, characterized in that, comprising: The server receives the request for establishing a PBB-TE path connection sent by the Ethernet management system or the upper application layer of the Ethernet, and queries the link status information in the Ethernet; The server calculates routing information for establishing a PBB-TE path connection according to the request for establishing a PBB-TE path connection and the link state information; The server sends the routing information to the edge bridge in the Ethernet, where the routing information is used to instruct the edge bridge to establish a PBB-TE path. 2. The method for PBB-TE path management according to claim 1, wherein the routing information is sent to the edge network bridge in the Ethernet, and the routing information is used to instruct the edge network bridge to establish After the steps of the PBB-TE path also include: Sending a PBB-TE path connection release request to any bridge on the PBB-TE path in the Ethernet, where the release PBB-TE path connection request is used to instruct the network bridge to release the PBB-TE path. 3. The method for PBB-TE path management according to claim 1 or 2, characterized in that, the routing information includes explicit routing information from the ingress bridge of the forwarding path to the ingress/egress port of the egress bridge , the explicit routing information includes the address information of each network bridge, or includes the egress port information of each network bridge. 4. The method for PBB-TE path management according to claim 1, wherein the routing information is sent to the edge network bridge in the Ethernet, and the routing information is used to instruct the edge network bridge to establish The PBB-TE path specifically includes: The ingress bridge receives the routing information, generates a first connection announcement signaling message, and transmits it to the downstream bridge along the route; When the downstream intermediate bridge receives the first connection announcement signaling message, it records the relevant data flow information, and simultaneously adds its own receiving port and MAC address information to the first connection announcement signaling message, and then continues to the downstream The bridge forwards until the egress bridge; When the egress bridge receives the sequentially modified first connection announcement signaling message, generate a second connection announcement signaling message and return it to the upstream bridge according to the original route; The intermediate bridge that receives the second connection announcement signaling message performs resource reservation according to the announcement signaling message, and adds the resource reservation result to the second connection announcement signaling message, and then continues to follow the original route back to the upstream bridge, up to the ingress bridge; After the ingress bridge receives the sequentially modified second connection announcement signaling message, it is judged whether each downstream bridge resource is reserved successfully, and if so, a PBB-TE path is established; or The egress bridge receives the routing information, generates a first connection announcement signaling message, and transmits it to the upstream bridge along the route; When the upstream intermediate bridge receives the first connection announcement signaling message, it records the relevant data flow information, and simultaneously adds its own receiving port and MAC address information to the first connection announcement signaling message, and then continues upstream The bridge forwards until the ingress bridge; When the ingress bridge receives the sequentially modified first connection announcement signaling message, it generates a second connection announcement signaling message, and returns it to the downstream bridge according to the original route; The intermediate bridge that receives the second connection announcement signaling message performs resource reservation according to the announcement signaling message, and adds the resource reservation result to the second connection announcement signaling message, and then continues to follow the original route back to downstream bridges up to the egress bridge; After the egress bridge receives the sequentially modified second connection announcement signaling messages, it judges whether the resources of each upstream bridge are successfully reserved, and if so, establishes a PBB-TE path. 5. The method for PBB-TE path management according to claim 1, wherein the routing information is sent to the edge bridge in the Ethernet, and the routing information is used to instruct the edge bridge to establish The PBB-TE path specifically includes: When the ingress bridge receives the routing information, it generates a first connection announcement signaling message, and sends the first connection announcement signaling message to an adjacent bridge through its own port other than the receiving port; The intermediate bridge that receives the first connection announcement signaling message compares its own MAC address with the explicit route in the first connection announcement signaling message, and if they are the same, records the relevant data flow information, and simultaneously The own receiving port and MAC address information are added to the first connection announcement signaling message, and then continue to be forwarded to the adjacent bridge through other ports except the receiving port; if they are not the same, the first connection is discarded announcing signaling messages; When the egress bridge receives the sequentially modified first connection announcement signaling message, it generates a second connection announcement signaling message, and returns the second connection announcement signaling message to the upstream intermediate network according to the original route bridge; The intermediate bridge that receives the second connection announcement signaling message performs resource reservation according to the announcement signaling message, and adds the resource reservation result to the second connection announcement signaling message, and then sends the modified The second connection announcement signaling message continues to return to the upstream bridge according to the original route until the ingress bridge; After the ingress bridge receives the sequentially modified second connection announcement signaling message, it is judged whether each downstream bridge resource is reserved successfully, and if so, a PBB-TE path is established; or When the egress bridge receives the routing information, it generates a first connection announcement signaling message, and sends the first connection announcement signaling message to an adjacent bridge through its own port other than the receiving port; The intermediate bridge that receives the first connection announcement signaling message compares its own MAC address with the explicit route in the first connection announcement signaling message, and if they are the same, records the relevant data flow information, and simultaneously The own receiving port and MAC address information are added to the first connection announcement signaling message, and then continue to be forwarded to the adjacent bridge through other ports except the receiving port; if they are not the same, the first connection is discarded announcing signaling messages; When the ingress bridge receives the sequentially modified first connection announcement signaling message, it generates a second connection announcement signaling message, and returns the second connection announcement signaling message to the downstream intermediate network according to the original route bridge; The intermediate bridge that receives the second connection announcement signaling message performs resource reservation according to the announcement signaling message, and adds the resource reservation result to the second connection announcement signaling message, and then sends the modified The second connection announcement signaling message continues to return to the downstream bridge according to the original route until the egress bridge; After receiving the sequentially modified second connection announcement signaling messages, the egress bridge judges whether resources of each upstream bridge are reserved successfully, and if so, establishes a PBB-TE path. 6. The method for PBB-TE path management according to claim 5, characterized in that, When the ingress bridge or the egress bridge receives the routing information, the generated first connection announcement signaling message uses the unicast MAC address of the next-hop bridge in the explicit route as the destination MAC address of its own frame . 7. An operator backbone network bridging-traffic engineering PBB-TE path management device, characterized in that it includes; A connection control module, configured to receive a PBB-TE path connection establishment request transmitted by an Ethernet management system or an Ethernet upper application layer; A routing control module, configured to calculate routing information for establishing a PBB-TE path connection according to a request for establishing a PBB-TE path connection and Ethernet link state information, and transmit the routing information to the connection control module; Wherein, the connection control module is further configured to send the routing information to the edge bridge in the Ethernet, and the routing information is used to instruct the edge bridge to establish a PBB-TE path. 8. The PBB-TE path management device according to claim 7, characterized in that, The connection control module is further configured to send a request to release the PBB-TE path connection to any bridge on the PBB-TE path in the Ethernet, and control the bridge to release the PBB-TE path. 9. A system for operator backbone network bridging-traffic engineering PBB-TE path management, characterized in that it includes: The server is configured to receive a request for establishing a PBB-TE path connection sent by an Ethernet management system or an upper layer application layer of the Ethernet, and calculate and establish a PBB-TE path connection according to the request for establishing a PBB-TE path connection and link state information. routing information, and send the routing information to the edge bridge in the Ethernet; The edge bridge is configured to receive the routing information, and establish a PBB-TE path connection according to the routing information. 10. The system for PBB-TE path management according to claim 9, characterized in that, The server also sends a request to release the PBB-TE path connection to any bridge on the PBB-TE path in the Ethernet, and controls the bridge to release the PBB-TE path.

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