JP3620582B2 - Network management system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a network management system that performs management control for guaranteeing network quality such as traffic priority and bandwidth control, and more particularly to a network management system that centrally manages network operation policies for management control. .
[0002]
[Prior art]
Despite recent advances in communication technology and information processing technology, the explosion of the Internet has led to an increase in traffic congestion in local area networks (LAN) and wide area networks (WAN). Yes. On the other hand, traffic of important business applications in a company and traffic of applications that communicate voice information such as VoIP (Voice over IP) transferred as IP data must be processed as soon as possible regardless of network congestion. An inconvenient situation occurs that affects the sales of the company or the sound is interrupted. That is, in such a network environment, it is necessary to securely perform information communication by preferentially securing a bandwidth for specific traffic. Therefore, there is a network management system that performs network traffic control using QoS (Quality of Service) technology that performs prioritization and bandwidth guarantee for each flow and application.
[0003]
FIG. 14 shows an outline of the configuration of such a conventional network management system. This network management system includes first to fifth nodes 11 as network devices that constitute a network 10.₁~ 11₅And a policy server 12 that manages a QoS policy that defines a network operation policy for guaranteeing QoS such as priority and bandwidth control of various traffic flowing in or out at each node in the network 10.
[0004]
In this network management system, the QoS policy set by the network administrator is centrally managed by the policy server 12. The policy server 12 sets a policy as a QoS parameter for a node to be reflected among various QoS policies managed in an integrated manner. Each node in the network 10 in which the QoS parameter based on the policy is set performs traffic control according to the set policy, such as identification of traffic actually input / output to / from the own node, flow control, flow monitoring or shaping, Perform QoS function.
[0005]
Such a policy server 12 is executed by software. For example, in the policy server 12, a policy created by a network administrator in a graphical user interface (Graphical User Interface: hereinafter abbreviated as GUI) environment is connected to a specified node or a plurality of nodes. Thus, the QoS policy is set.
[0006]
Examples of software having such a policy server function include “PolicyXpert” manufactured by Japan HP, “PolicyManager” manufactured by Cisco Systems, Inc., and “Optitivity Policy Services” manufactured by Nortel Networks. .
[0007]
[Problems to be solved by the invention]
However, the conventional policy server 12 is connected to each node 11.₁~ 11₅However, there is a problem that it is impossible to determine how the set QoS policy actually functions on the network 10.
[0008]
For example, the first node 11₁When the QoS policy of “guaranteed bandwidth of 10 Mbit per second (hereinafter abbreviated as bps)” is set for the traffic policy from the node A to the node B, the conventional policy server 12 Node 11₁Although this QoS policy can be set, the policy server 12 cannot recognize whether or not a bandwidth of 10 Mbps is actually secured. Therefore, the QoS policy setter side cannot guarantee whether 10 Mbps traffic can flow. In addition, when the bandwidth of 10 Mbps is secured but the traffic does not actually exceed 10 Mbps, the policy server 12 cannot recognize how much bandwidth is actually used. It is impossible to determine whether or not effective use is possible or whether an unnecessary policy is set. Furthermore, although the bandwidth of 10 Mbps is secured, in fact, when traffic of 30 Mbps is always flowing in, the policy server 12 cannot recognize whether or not the control is always performed to reduce the traffic to 10 Mbps. Furthermore, it is impossible to determine whether or not it is necessary to reserve a lot of bandwidth for the traffic.
[0009]
On the other hand, it is conceivable to allow the network administrator to monitor the bandwidth of each link by time or flow by using another software or the like that performs bandwidth monitoring, and to recognize the actual traffic situation. However, in this case, it becomes impossible to determine which policy restricts or guarantees the traffic status of each link.
[0010]
Furthermore, the policy server 12 includes each node 11₁~ 11₅Although the created QoS policy can be set for each node, there is a problem that it is not possible to confirm whether or not the QoS policy is actually set for each node.
[0011]
For example, when a QoS policy different from the policy managed by the policy server 12 is set for the node, or when the QoS policy set by the policy server 12 is deleted from the node by other setting means, the management is performed. Inconsistency occurs between the existing policy server 12 and each node that sets the QoS policy and executes the QoS function. Therefore, when the policy server 12 calculates and manages the total reserved bandwidth, the bandwidth managed by the policy server 12 can be newly reserved. In some cases, bandwidth reservation is impossible. Such inconsistency is a problem that can be recognized for the first time when it is confirmed whether or not the actually set policy described above is functioning normally.
[0012]
SUMMARY OF THE INVENTION An object of the present invention is to provide a network management system that can monitor a policy operation status in each node according to a set QoS policy and guarantees the policy operation itself.
[0013]
[Means for Solving the Problems]
In the first aspect of the invention, (a) a parameter that defines a network operation policy for guaranteeing communication qualityCommunication quality parameter storage means for storing the information in association with each uniquely added identifier,Parameters stored in this communication quality parameter storage meansTogether with the server identification information given uniquely beforehand.Parameter setting means to be set in each node in a predetermined network, and operation information by parameters from the node where the parameters are set by this parameter setting meansAnd the server identification information set together with the identifier for identifying this parameter and the parameter.Acquisition means to acquire for each parameter, and acquired by this acquisition meansOperation information storage means for storing operation information for each parameter identified by the identifier, identifier and server identification information, and parameters stored in the communication quality parameter storage means and server identification information set by the parameter setting means. A setting status discrimination means for discriminating a parameter setting status based on whether or not the identifier and server identification information stored in the operation information storage means match, and each node based on the parameter operation information(B) a management table for storing the parameters set by the parameter setting means, and a management table for storing the parameters set by the parameter setting means for storing the policy operation status confirmation for each parameter. TheIdentified by identifierTraffic control means that monitors traffic specified by parameters and controls traffic based on the monitoring results, and operation information by this traffic control means for each parameterAlong with the identifier and server identification information stored in the management tableA network management system is provided with a plurality of nodes provided with operation information notification means for notifying the policy server.
[0016]
IeClaim 1In the described invention, in the network management system composed of a policy server and a plurality of nodes constituting a predetermined network, the parameters defining the network operation policy for guaranteeing the communication quality set in each node by the policy server are respectively The communication quality parameter storage means is set in association with the identifier assigned for identification, and the parameter stored therein is set in each node together with server identification information for identifying the policy server. In each node, the set parameters are stored in the management table, and the traffic designated by the parameters stored in the management table is monitored by the traffic control means and the traffic is controlled. Further, each node causes the policy information server to notify the policy server of the identifier and server identification information set at the same time as the parameters, in addition to the operation information by the traffic control means, for each set parameter. In the policy server, these are acquired by the acquisition means, and the operation information for each parameter identified by the acquired identifier, the identifier, and the server identification information are stored in the operation information storage means. Based on the parameter operation information acquired by the analysis processing means, predetermined analysis processing is performed for each parameter for policy operation status confirmation in each node, and the setting status determination means stores the communication quality parameter storage means. The parameter setting status is determined based on whether the stored parameter and the server identification information set by the parameter setting means match the identifier and server identification information stored in the operation information storage means.
[0017]
Claim 2In the described invention,Claim 1In the described network management system, the analysis processing means performs a predetermined analysis processing at each first time interval, and the operation information notification means performs notification at every second time interval shorter than the first time interval. It is characterized by being.
[0018]
IeClaim 2In the described invention, operation information and the like are periodically notified from each node at a first time interval, and the server periodically performs analysis processing at a second time interval having a longer period. .
[0019]
Claim 3In the described invention, claim 1 is provided.Or claim 2In the network management system described, the operation information for each parameter notified by the operation information notification means is provided with a flag that is set when a bandwidth violation specified by the parameter occurs, and the analysis processing means It is characterized by generating an alarm when set.
[0020]
IeClaim 3In the described invention, the node in which the parameter is set is provided with a flag that is set when a bandwidth violation occurs as a violation of the parameter by the traffic control means. generate.
[0021]
Claim 4In the described invention,Claim 3In the described network management system, the analysis processing means generates alarm information classified into analysis result levels in order of flag check, frequency of bandwidth violation, and traffic data in operation information for each parameter. Yes.
[0022]
IeClaim 4In the described invention, in the analysis processing in the server, for each parameter, the flag provided in the acquired operation information is checked, the frequency of bandwidth violation, the traffic data in the operation information is analyzed in order, and the result is classified into levels. Generated as alarm information.
[0023]
Claim 5In the described invention,Claim 4In the network management system described above, the analysis processing means is further characterized in that it graphs the used bandwidth status based on the operation information.
[0024]
IeClaim 5In the described invention, in the analysis process, based on the operation information acquired, the use band situation is graphed, thereby making it easy to visually recognize management by the network administrator.
[0025]
Claim 6In the described invention,Claim 1In the network management system described above, the parameter setting status for the node is determined based on whether or not operation information corresponding to all parameters stored in the communication quality parameter storage means has been acquired. .
[0026]
IeClaim 6In the described invention, when the operation information corresponding to all parameters stored in the communication quality parameter storage means is acquired, the parameter setting for the node is normally performed, and when all the information is not acquired, the parameter setting for the node is performed. It is judged that there was an abnormality.
[0027]
Claim 7In the described invention,Claim 4In the network management system described above, the communication quality parameter storage means corresponds to the parameter and the identifier, an alarm notification level for determining whether or not to issue an alarm occurrence for each parameter in advance, and an alarmnotificationNotification destination information indicating a notification destination when the level is exceeded is stored, and when alarm information is generated, alarm notification is performed based on the alarm notification level and notification destination information stored in the communication quality parameter storage means An alarm notification control means is provided.
[0028]
IeClaim 7In the described invention, the communication quality parameter storage means further stores the alarm notification level and the notification destination information in association with the parameters.
[0029]
Claim 8In the described invention,Claim 1 or claim 2In the network management system described above, the policy server stores link information as connection information between nodes in advance, and the node notifies the policy server of bandwidth information for each link corresponding to the link information. Is displayed.
[0030]
IeClaim 8In the described invention, in the analysis process, the bandwidth usage status of the link is displayed from the link information between the nodes.
[0031]
Claim 9In the described invention,Claim 8In the described network management system, the policy server and the node perform analysis processing and notification at the same time interval.
[0032]
IeClaim 9In the described invention, the notification of operation information for each parameter from the node and the analysis processing timing in the policy server are set at the same interval.
[0033]
DETAILED DESCRIPTION OF THE INVENTION
[0034]
【Example】
Hereinafter, the present invention will be described in detail with reference to examples.
[0035]
First embodiment
[0036]
FIG. 1 shows an outline of the configuration of a network management system according to the first embodiment of the present invention. The network management system according to the first embodiment includes first to fifth nodes 21 as network devices constituting the network 20.₁~ 21₅A policy server 22 for managing a QoS policy in which a network operation policy for guaranteeing QoS such as priority and bandwidth control of various traffic flowing in or out of each node in the network 20 is defined; An administrator terminal 23 for setting the QoS policy for the policy server 22 and monitoring the application result is provided.
[0037]
In such a network management system, the QoS policy created by the network administrator at the administrator terminal 23 is centrally managed by the policy server 22. The policy server 22 similarly includes first to fifth nodes 21 constituting the network 20 designated by the network administrator.₁~ 21₅For all of the above, a QoS policy to be managed is set. The administrator terminal 23 can monitor the application result of each policy for each policy, and can confirm how the policy set in each node functions on the network 20.
[0038]
The main part of the network management system in the first embodiment will be described below. However, the first to fifth nodes 21₁~ 21₅Are assumed to have the same configuration, and here, the first node 21₁Only will be described.
[0039]
The administrator terminal 23 has a GUI application 24, and displays a creation screen for creating QoS policy data on a display means (not shown), a policy operation state in each node of the network 20, an analysis result or an alarm display. Do. Further, the GUI application 24 receives input information for setting a QoS policy by the network administrator. Here, it is assumed that the GUI application 24 is executed on the administrator terminal 23 and its execution screen is displayed on a display means (not shown) of the administrator terminal 23, but the GUI application is executed on the policy server 22 and the execution screen is managed. It may be displayed on a display means (not shown) of the person terminal 23.
[0040]
The policy server 22 is a policy storage database that stores QoS policies such as priority control and bandwidth control in the network 20 created by the network administrator via the administrator terminal 23 and information related to nodes that reflect this QoS policy. And a policy management unit 26 that collects policy operation information from each node together with access control to the policy storage DB 25 and setting of a QoS policy to each node of the network 20. I have. Further, the policy server 22 is assigned a policy server KEY 27 unique in the network 20 that can be uniquely specified in the network 20 in advance. Such a policy server KEY27 includes, for example, an IP (Internet Protocol) address and a host name.
[0041]
The policy management unit 26 generates a policy data generation unit 28 that generates QoS policy data from the input information input by the network administrator in accordance with the display screen of the display means by the GUI application 24 of the administrator terminal 23, and the policy storage DB 25. A DB control unit 29 for writing and reading various information, a QoS parameter setting unit 30 for setting a QoS policy as a QoS parameter in a node in the network 20, and policy operation information in each node in the network 20. And a band report processing unit 31 for collecting and analyzing the data.
[0042]
The band report processing unit 31 includes an alarm analysis unit 32 that performs alarm analysis for each policy from the collected policy operation information, and a band analysis unit 33 that performs band analysis for each policy and generates an analysis result such as creation of a graph. have.
[0043]
In such a policy management unit 26, the QoS policy data generated by the policy data generation unit 28 is stored in the policy storage DB by the DB control unit 29 and registered as a QoS parameter. This QoS parameter is read by the DB control unit 29 and set to a designated node in the network 20 by the QoS parameter setting unit 30. At that time, the QoS parameter setting unit 30 translates the language into a setting language depending on the type of the network device that is the node constituting the network 20 and sets the setting for each node. When QoS parameters are set for each node, the policy operation information is collected, the band report processing unit 31 performs band analysis and alarm analysis for each policy, and the result is displayed on a display unit (not shown) of the administrator terminal 23. Is displayed.
[0044]
The policy storage DB 25 includes policy information 34 in which the QoS policy generated by the policy data generation unit 28 is associated with a management number called a unique policy identifier (ID) in the network 20, network The node information 35 relating to each node constituting the node 20 and the use band information 36 which is policy operation information collected for the applied QoS policy are stored. The node information 35 includes node setting information for connecting to each node, and node application information indicating to which node the QoS policy stored in the policy information 34 is applied.
[0045]
FIG. 2 shows an example of policy information 34 stored in the policy storage DB 25. This policy information 34 is assigned a policy ID 40 for each QoS policy, and is composed of a condition 42 and an action 43 as well as a general QoS policy together with a policy name 41. The policy ID 40 is a management number assigned to uniquely identify the QoS policy in the network 20 as described above. The policy name 40 is a name given by the network administrator who monitors the creation of the QoS policy and its operation information to identify each policy. The condition 42 and the action 43 mean that the action specified by the action 43 is executed when the condition specified by the condition 42 is satisfied as the QoS policy.
[0046]
For example, the QoS policy uniquely identified in the network 20 as the policy ID “000001” and specified as “Policy 1” by the network administrator is that the “flow from the node A to the B” is “the peak rate is 1 Mbps or less”. It is defined that the bandwidth control is executed as follows.
[0047]
FIG. 3 shows an example of node setting information 45 constituting the node information 35. The node setting information 45 is setting information of each node to which the QoS policy is applied from the policy server 22 and includes information for connecting from the policy server 22 to each node. The node setting information 45 is associated with a node ID 46 for identifying each node constituting the network 20 in the DB, a node name 47, a node description 48 for allowing the network administrator to identify the node, An IP address 49 uniquely assigned to the node in the network 20, a password 50 for connecting to the node, and node interface information 51 are stored. Here, the interface information 51 is line information in each node necessary for setting the QoS parameter.
[0048]
Therefore, the QoS policy stored in the policy information 34 is identified as “000001” in the DB as the node ID 46, “node 1” as the node name 47 in the network, and “first node” by the network administrator. Policy server 22 refers to this node setting information and applies the password “password1” to the network device whose IP address 49 is identified by “123.123.111.1”. Means to connect and apply the QoS policy.
[0049]
FIG. 4 shows an example of node application information 55 constituting the node information 35. In the network management system according to the first embodiment, the nodes to which the QoS policy is applied are grouped, and the policy is applied to each group. For this reason, the node application information 55 defines which node belongs among the nodes whose setting information is stored in the node setting information 45 for each group, and is stored in the policy information 34 for each group to which these nodes belong. Which policy to apply is specified. In other words, for each node group defined by the node group name 56, the policy is applied in the policy stored in the policy node 34 and the affiliated node 57 that lists the nodes to which the network 20 belongs. An application policy 58 in which policies are listed is stored.
[0050]
For example, the node group specified by the first node group name is the first to third nodes 21 constituting the network 20.₁~ 21₃Means that “Policy 1”, “Policy 2”, and “Policy 3” specified in the policy information 34 are applied to this node group.
[0051]
FIG. 5 shows an example of the used bandwidth information 36 stored in the policy storage DB 25. This use band information 36 corresponds to a policy ID 60 uniquely assigned to each policy, a time zone 63 including a start time 61 and an end time 62 at which the operation information is monitored, a violation flag 64, an inflow Traffic 65 and outflow traffic 66 are stored. The violation flag 64 is a flag indicating whether or not bandwidth control has been performed at least once in violation of the QoS policy set for the node. When the violation flag 64 is “0”, it indicates that the bandwidth control was not performed because the set QoS policy was not violated. When the violation flag 64 was “1”, the set QoS policy was violated and at least one bandwidth was set. Indicates that control has taken place. As the inflow traffic 65, for example, the average inflow traffic rate “Rate” in the time zone 63 and the peak value “P Rate” of the inflow traffic are stored. Similarly, as the outflow traffic 66, for example, the average outflow traffic rate “Rate” in the time zone 63 and the peak value “P Rate” of the outflow traffic are stored.
[0052]
In such a policy server 22, QoS policy data is generated in the policy data generation unit 28 of the policy management unit 26 as input information for creating the QoS policy input via the GUI application 24 of the administrator terminal 23. The The DB control unit 29 registers the QoS information in the policy information 34 of the policy storage DB 25 as a QoS parameter. The policy management unit 26 sets the QoS parameter registered in the policy information 34 specified by the node application information of the node information 35 with reference to the node setting information of the node information 35 for each node. At that time, the QoS parameter setting unit 30 translates the language into a setting language depending on the type of the network device that is the node constituting the network 20 and sets the setting for each node. When QoS parameters are set for each node, the policy operation information is accumulated in the used band information 36 of the policy storage DB 25 for each policy, and the band report processing unit 31 performs band analysis and alarm analysis for each policy. The result is displayed on a display means (not shown) of the administrator terminal 23 and can be monitored by the administrator terminal 23.
[0053]
Next, returning to FIG. 1, the first node 21₁Will be described.
[0054]
First node 21₁Is configured to execute the QoS policy set by the policy server 22. Such a first node 21₁QoS parameter management unit 70 that manages the QoS parameters set by the policy server 22₁QoS parameter management unit 70₁The first node 21 according to the QoS parameters managed by₁Traffic control unit 71 for controlling traffic flowing into or out of the traffic₁And.
[0055]
QoS parameter management unit 70₁The QoS parameter management table 72 for managing the QoS parameters set by the QoS parameter setting unit 30 of the policy server 22.₁And the QoS parameter management table 72₁The traffic control unit 71 according to the QoS parameters managed by₁QoS report management table 73 for storing bandwidth information for each policy whose traffic is controlled by₁QoS report management table 73₁Report scheduler 74 for transmitting the bandwidth information stored in the policy server 22 to the policy server 22₁And have.
[0056]
FIG. 6 shows a QoS parameter management table 72.₁This shows an example of the table information managed by. QoS parameter management table 72₁Is a QoS parameter 75 set by the parameter setting unit 30 of the policy server 22.₁Each policy ID 76 uniquely assigned to the QoS policy₁And policy server KEY77 of policy server 22₁And are stored. QoS parameter 75₁"Flow" 78 indicating a flow as a policy condition₁And action 79₁It consists of.
[0057]
For example, the QoS parameter indicating that the QoS policy identified by the policy ID “000001” indicates that “the bandwidth is controlled so that the peak rate is 1 Mbps or less for the flow from the node A to the B” sets this QoS parameter. Policy server KEY77 that identifies the policy server₁Are managed in association with each other.
[0058]
FIG. 7 shows a QoS report management table 73.₁This shows an example of the table information managed by. QoS report management table 73₁Then, policy ID 80₁Policy server KEY81 for specifying the policy server for which the QoS policy is set for each₁And a time zone 82 including the start time and end time at which the operation information is monitored₁And violation flag 83₁And inflow traffic 84₁And outflow traffic 85₁Are managed.
[0059]
For example, for the QoS policy identified by the policy ID “000001”, the policy server KEY “PS01” for specifying the policy server 22, the violation flag, the average inflow traffic rate “Rate” in the time zone, and the inflow traffic The peak value “P Rate”, the average outflow traffic rate “Rate”, and the peak value “P Rate” of outflow traffic are managed.
[0060]
In this way, the QoS parameter management unit 70₁The QoS parameter management table 72 sets the QoS parameters set by the policy server 22.₁And the traffic control unit 71 for each policy.₁Operation report by QoS report management table 73₁Manage with. And report scheduler 74₁QoS report management table 73₁Information stored in the policy server is notified to the policy server.
[0061]
Returning to FIG. 1, the description will be continued. Traffic control unit 71₁The first node 21 in the network 20₁A flow identification unit 90 for identifying flow information including a transmission source, a transmission destination, protocol information, and the like of traffic flowing into or out of the network₁And the flow identification unit 90₁Bandwidth monitoring unit 91 that monitors traffic bandwidth based on the identification result₁QoS parameter management unit 70₁The bandwidth monitoring unit 91 according to the QoS parameters managed by₁Bandwidth control unit 92 that controls the flow rate of traffic from the monitoring result of₁And have.
[0062]
Such a traffic control unit 71₁Performs traffic monitoring or flow rate control in accordance with the QoS parameters set by the policy server 22 and sends the monitoring results and bandwidth control results to the QoS parameter management unit 70.₁Send to.
[0063]
That is, the first node 21₁The QoS parameter management unit 70 converts the QoS parameters set by the policy server 22 into₁The policy server KEY that identifies the setting source policy server is managed. Further, according to the set QoS parameter, the traffic control unit 71₁The QoS monitoring table 73 shows the results of bandwidth monitoring and control for each policy.₁QoS parameter management unit 70₁Report Scheduler 74₁To the policy server 22 of the policy setting source.
[0064]
The policy server 22 and the first to fifth nodes 21 having such a configuration.₁~ 21₅Each has a central processing unit (CPU) (not shown) so that the above-described control can be executed according to a program stored in a predetermined storage device such as a read-only memory (ROM). It has become.
[0065]
Next, the operation of the network management system in the first embodiment having the above-described configuration will be described.
[0066]
FIG. 8 shows a flow of a series of operations from policy creation to report accumulation for monitoring the operation status in the network management system in the first embodiment. First, when the network administrator activates the GUI application 24 at the administrator terminal 23 to generate the QoS policy, the GUI application 24 of the administrator terminal 23 receives input information from the network administrator on the display screen. (Step S100). The administrator terminal 23 transmits the input information 101 received here to the policy server 22.
[0067]
The policy server 22 generates policy data from the input information from the administrator terminal 23 by the policy data generation unit 28. The generated policy data is given a new policy ID corresponding to the new policy data by the DB control unit 29 and stored as policy information 34 in the policy storage DB 25 as shown in FIG. 2 (step S102).
[0068]
When the created policy is registered in the policy storage DB 25, the QoS parameter setting unit 30 similarly refers to the node information 35 designated in advance and sets the QoS policy to the node to be reflected. At that time, the QoS parameter setting unit 30 searches the node application information shown in FIG. 4 as to which node group each policy is applied to, and in accordance with the node setting information shown in FIG. The QoS parameter 104, the policy ID, and the policy server KEY of the policy server 22 converted to the setting language corresponding to the type of the node to be connected and reflected are transmitted to the node (step S103). Hereinafter, the policy server 22 is the first node 21.₁Will be described assuming that QoS parameters are set.
[0069]
The first node 21 that has received the policy ID, the policy server KEY of the policy server 22 and the QoS parameter 104 from the policy server 22₁QoS parameter management unit 70₁Accordingly, as shown in FIG. 6, the QoS parameter management table 72₁Register with. Further, the QoS parameter management unit 70₁The traffic control unit 71₁Flow identification unit 90₁Then, the identification of the flow set as the QoS parameter is started (step S105).
[0070]
Traffic control unit 71₁Flow identification unit 90₁Identifies the flow with reference to the header information of the data flowing in as traffic. As a result of the identification, the QoS parameter management table 73₁When the traffic matching the flow specified by the policy managed by the network is identified, the bandwidth monitoring unit 91₁Is instructed to start monitoring the bandwidth of the traffic (step S106).
[0071]
Bandwidth monitoring unit 91₁The flow identification unit 90₁QoS parameter management table 72₁When traffic matching the flow specified by the policy managed in is identified, monitoring information such as “average rate”, “peak rate”, etc., which is the bandwidth monitoring data of the traffic of the specified flow is collected QoS parameter management unit 70₁(Step S107).
[0072]
QoS parameter management unit 70₁The traffic control unit 71₁Bandwidth monitoring unit 91₁When the bandwidth monitoring data transmitted by the client is received, the QOS report management table 73 is obtained as inflow traffic data for each policy ID as shown in FIG.₁(Step S108).
[0073]
QoS parameter management unit 70₁The bandwidth monitoring unit 91₁The policy that acquired the bandwidth monitoring data from the QoS parameter management table 73 shown in FIG.₁To determine whether it is a “bandwidth control policy” (step S109). That is, it is determined whether or not the “action” of the policy that acquired the bandwidth monitoring data specifies that bandwidth control is to be performed. QoS parameter management unit 70₁When it is determined that the policy for obtaining the bandwidth monitoring data is the “bandwidth control policy” (step S109: Y), the traffic control unit 71₁Bandwidth control unit 92₁The bandwidth control is instructed so as to be the bandwidth set as the policy. Further, inflow traffic from the bandwidth monitoring data acquired in step S107 is converted into the QoS parameter management table 72.₁It is determined whether or not the band specified by the policy managed in (1) is violated (step S110).
[0074]
QoS parameter management unit 70₁When it is determined that the acquired inflow traffic violates the bandwidth specified by the policy (step S110: Y), the QoS report management table 73₁The corresponding violation flag is set (step S111), and the bandwidth control unit 92 is set so that the designated bandwidth is obtained.₁Is instructed to perform bandwidth control (step S112). For example, the QoS parameter management table 72₁When the “average rate” is designated as “behavior” according to the policy managed in (1), the bandwidth control unit 92 controls the traffic inflow so that the “average rate” is less than or equal to the designated value.₁To instruct. Thus, the bandwidth control unit 92₁Executes the instructed bandwidth control and starts bandwidth monitoring.
[0075]
In step S109, the QoS parameter management unit 70₁However, when it is determined that the policy that acquired the bandwidth monitoring data in step S107 is not the “bandwidth control policy” (step S109: N), or inflow traffic acquired in step S107 in step S110 is set to the bandwidth specified in the policy. When it is determined that there is no violation (step S110: N), or when bandwidth control is instructed in step S112, the bandwidth monitoring unit 91₁Is the first node 21₁The traffic flowing out from the network is monitored, monitoring information such as “average rate” and “peak rate”, which is bandwidth monitoring data of the traffic, is collected, and the QoS parameter management unit 70₁(Step S113).
[0076]
QoS parameter management unit 70₁The traffic control unit 71₁Bandwidth monitoring unit 91₁When the bandwidth monitoring data transmitted by the client is received, the QoS report management table 73 is stored as outflow traffic data for each policy ID as shown in FIG.₁(Step S114).
[0077]
QoS parameter management unit 70₁Report Scheduler 74₁Is a predetermined time interval T₁QoS report management table 73 for each₁The monitoring data for each policy registered in (1) is transmitted to the policy server 22. That is, the report scheduler 74₁Last time QoS report management table 73₁The time interval T after the monitoring data for each policy registered in step S1 is transmitted to the policy server 22.₁Is monitored, and when it is not detected (step S115: N), the QoS parameter management unit 70₁Returns to step S106 and repeats a series of operations of “flow identification”, “inflow traffic bandwidth monitoring”, “bandwidth control”, and “outflow traffic monitoring”.
[0078]
In step S115, the report scheduler 74₁By the previous QoS report management table 73₁The time interval T after the monitoring data for each policy registered in step S1 is transmitted to the policy server 22.₁Is detected (step S115: Y), the report scheduler 74₁Is the QoS report management table 73 shown in FIG.₁The bandwidth monitoring data 116 for each policy registered in the policy is transmitted to the policy server 22. The bandwidth monitoring data 116 is transmitted for each policy, and indicates the bandwidth monitoring data including the policy ID, the policy server KEY, the monitoring time zone, the violation flag, the inflow traffic, and the outflow traffic, and the bandwidth monitoring data in which node. Node identification information for identification is also transmitted at the same time.
[0079]
If the bandwidth monitoring data is at the peak rate, the time interval T₁The peak value during is stored, and for the average rate, the time interval T₁The average value between is stored. Time interval T₁If the bandwidth specified by the policy is violated even once during this period and bandwidth control is performed, the “violation flag” is set.
[0080]
Furthermore, in step S115, the time interval T₁Is detected, and the report scheduler 74₁When the bandwidth monitoring data for each policy is transmitted by the QoS parameter management unit 70₁QoS report management table 73₁Is cleared (step S117), and the process returns to step S106 again. Therefore, the time interval T₁For each policy, the latest bandwidth monitoring data indicating the bandwidth usage status in the policy unit is the QoS report management table 73.₁Will be saved.
[0081]
In this way, the first node 21₁Report Scheduler 74₁The time interval T specified in advance by₁The policy server 22 that has received the bandwidth monitoring data 116 transmitted every time is stored in the used bandwidth information 36 of the policy storage DB 25 by the bandwidth report processing unit 31 via the DB control unit 29 as shown in FIG. (Step S118).
[0082]
The bandwidth report processing unit 31 in the policy management unit 26 of the policy server 22 performs a predetermined time interval T₂Each time, bandwidth monitoring data for each policy is acquired from the used bandwidth information 36 of the policy storage DB 25 via the DB control unit 29, and a predetermined analysis process is performed.
[0083]
This time interval T₂Is a time interval T specified by each node constituting the network 20.₁A larger value is sufficient. That is, the bandwidth monitoring data analysis processing interval in the policy server 22 is set to be equal to or longer than the bandwidth monitoring data transmission interval from the node. For example, the report interval T by the report scheduler of the node₁Every 10 minutes, and the bandwidth monitoring data analysis interval T by the policy server 22₂By setting every one day, it is possible to obtain an analysis result of the bandwidth monitoring data in policy units every 10 minutes once a day.
[0084]
The policy management unit 26 of the policy server 22 performs the time interval T after the previous bandwidth report processing unit 31 performs the bandwidth monitoring data analysis processing.₂Is detected (step S119: N), and when this is detected (step S119: Y), the DB control unit 29 acquires the bandwidth monitoring data stored in the used bandwidth information 36. Then, the band analysis unit 33 and the alarm analysis unit 32 of the band report processing unit 31 perform predetermined analysis processing (step S120), and the process returns to step S119 again to monitor the next analysis processing timing. This analysis result is accumulated and saved in the policy storage DB 25.
[0085]
Thus, the bandwidth monitoring data indicating how the policy generated by the network administrator at the administrator terminal 23 functions in the network 20 is analyzed for each generated policy. The analyzed bandwidth monitoring data can be referred to as appropriate at the administrator terminal 23, so that the network administrator can accurately grasp the operation status of the applied policy.
[0086]
FIG. 9 shows a flow of a series of operations for confirming policy operation information from the administrator terminal 23. When the network administrator activates the GUI application 24 in order to monitor the operation information of the QoS policy already created and applied to each node constituting the network 20 at the administrator terminal 23, a report reference instruction is issued for each policy. (Step S130). The GUI application 24 of the administrator terminal 23 transmits an operation information display request 131 for each policy to the policy server 22.
[0087]
The policy server 22 that has received the display request 131 receives the alarm information for each policy analyzed by the alarm analysis unit 32 from the analysis result that has already been analyzed by the bandwidth report processing unit 31 and accumulated and stored in the policy storage DB 25, and the bandwidth The bandwidth analysis information for each policy analyzed by the analysis unit 33 is searched (step S132), and is transmitted as an analysis result 133 to the administrator terminal 23.
[0088]
When the administrator terminal 23 receives the analysis result 133 from the policy server 22, the administrator terminal 23 displays the analysis result 133 on a display unit (not shown), and informs the network administrator of a time interval T that is policy operation information.₂The alarm information and the band analysis information analyzed for each policy are shown for each policy (step S134).
[0089]
Next, the bandwidth monitoring data analysis processing performed by the bandwidth report processing unit 31 of the policy server 22 will be described in detail.
[0090]
FIG. 10 shows the bandwidth report processing unit 31.soIt shows the outline of the processing contents to be performed. The bandwidth report processing unit 31 uses the time interval T₂For each policy, the bandwidth monitoring data stored and saved in the policy storage DB is acquired for each policy (step S140). Then, the bandwidth report processing unit 31 determines whether this policy is a “bandwidth control policy” (step S141). When it is determined that the policy of the acquired bandwidth monitoring data is the “bandwidth control policy” (step S141: Y), the alarm analysis unit 32 performs alarm analysis.
[0091]
That is, first, an alarm level variable indicating an alarm level is set to “0”, and a time interval T as shown in FIG.₁Every time, the analysis of the bandwidth monitoring data transmitted by the report scheduler and accumulated in the used bandwidth information 36 of the policy storage DB 25 is started (step S142).
[0092]
First, by checking whether or not the violation flag of the acquired bandwidth monitoring data is set, the occurrence of bandwidth violation is checked (step S143). When the violation flag of the bandwidth monitoring data is set, it is determined that “at least one bandwidth violation has occurred”, and the alarm level is set to “1”. When the violation flag is not set, the alarm level remains “0”.
[0093]
Next, the frequency violation frequency check is performed by determining whether or not the number of times that the inflow traffic of the bandwidth monitoring data exceeds the traffic set as the bandwidth parameter of the QoS policy is equal to or greater than a predetermined ratio. Is performed (step S144). When the specified ratio is exceeded, it is determined as “warning” and the alarm level is set to “2”. When the specified percentage is not exceeded, the alarm level remains unchanged.
[0094]
Next, it is determined whether or not the outflow traffic of the bandwidth monitoring data exceeds the traffic set as the bandwidth parameter of the QoS policy, or whether or not the outflow traffic is “0”. Is checked (step S145). When the outflow traffic exceeds the set traffic or is “0”, it is determined that “policy operation is abnormal” and the alarm level is set to “3”. When the outflow traffic does not exceed the set traffic and the outflow traffic is not “0”, the alarm level remains unchanged.
[0095]
As a result of the alarm analysis performed in steps S142 to S145 in this way, an alarm is generated when the alarm level is “1” or higher, and alarm information is generated and stored in the policy storage DB 25 (step S146).
[0096]
FIG. 11 shows an example of the configuration of alarm information stored in the policy storage DB 25. As described above, the alarm information 160 includes, for each policy ID 161, the node ID 162 that is the node identification information indicating the node where the alarm has occurred, the time zone 163 including the monitoring start time and the monitoring end time, and the alarm content 164. Are stored in association with each other. The alarm content 164 includes the alarm level 165 determined in steps S142 to S145, the message content 166 notified to the administrator terminal 23 in response to the generated alarm, and the detailed content 167 for specifying the cause of the alarm. It consists of.
[0097]
Returning to FIG. When it is determined that the policy of the bandwidth monitoring data acquired in step S141 is not the “bandwidth control policy” (step S141: N), or in step S141, it is determined that the policy is “bandwidth control policy” and alarm analysis is performed ( In step S146), the bandwidth analyzer 33 graphs the bandwidth usage status from the bandwidth monitoring data accumulated in the bandwidth usage information 36 (step S147).
[0098]
FIG. 12 shows an example of a band usage status graph graphed by the band analysis unit 33. The bandwidth analyzer 33 generates a bandwidth usage status graph 170 from the bandwidth usage information 36 of the policy storage DB 25 for each policy, with the horizontal axis indicating time and the vertical axis indicating the bandwidth used (bps). This graph shows, for example, the bandwidth usage status of the policy name “Policy1” set in “first node” with respect to 500 kbps set by the QoS parameter as the requested bandwidth from 8:00 to 21:00. The time passage of inflow traffic and outflow traffic of the first node from 7:00 to 23:00 is shown.
[0099]
As described above, when the band usage graph 170 is generated in step S147, it is converted into image data as band analysis information and stored in the policy storage DB 25 (step S148).
[0100]
The bandwidth report processing unit 31 can select whether or not to delete the bandwidth monitoring data stored and stored in the used bandwidth information 36 that is the analysis target after the alarm analysis and the bandwidth analysis are performed as described above. It has become. For example, the administrator terminal 23 has instructed to delete in advance, or the time interval T₁When it is set to be deleted at the time of each report (step S149Y), the bandwidth monitoring data accumulated and stored in the used bandwidth information 36 as the analysis target is deleted (step S150). On the other hand, when it is set not to be deleted (step S149: N), the series of processing ends as it is (end).
[0101]
Here, the accumulated data such as graph images that continue to be accumulated and stored may be set in advance with an accumulation upper limit value corresponding to the number of files, file size, etc., and when exceeded, the oldest one may be deleted in order. .
[0102]
Further, the GUI application 24 displays the policy list by changing the display method such as “color coding” and “flashing” for each alarm level, for example, normal warnings and important warnings. You may make it easy to grasp | ascertain a state. Further, for details of the alarm, when the GUI application 24 is displaying a policy, for example, an “alarm reference” button may be pressed to display an alarm list screen. Furthermore, the bandwidth analysis graph can be referred to by, for example, pressing a “band analysis graph reference” button when the GUI application 24 is displaying a policy, and selecting a list of bandwidth analysis graphs by node or by date. May be displayed, and a viewer application that displays a graph of a node or date selected from the above may be started.
[0103]
In the network management system in the first embodiment performing such a series of operations, the policy setting status is confirmed as follows.
[0104]
That is, the node sets the time interval T in step S115.₁Report scheduler 74 every time₁The bandwidth monitoring data for each policy transmitted by the method includes bandwidth monitoring data related to a policy for which no traffic has occurred. Therefore, in all the QoS parameters set in the node, the policy ID, the policy server KEY, and the bandwidth monitoring data when there is traffic are transmitted to the policy server.
[0105]
Since the policy server receives the bandwidth monitoring data for all the set QoS parameters, the policy setting in each node is checked by checking the policy ID with the policy server KEY in the bandwidth analysis processing performed in step S120. The situation can be easily confirmed.
[0106]
For example, when bandwidth monitoring data is not received from a set node for all QoS policies managed by the policy server, there is a possibility that the policy that should be originally set may not be set for that node. Judgment can be made. In this case, a new alarm level is assigned to this policy and stored as alarm information.
[0107]
If the policy IDs included in the received bandwidth monitoring data match, but the policy servers KEY are different, it can be determined that the policy is invalid. In this case, it may be set by another policy server or manually set by a network administrator or the like, and it may be excluded from the monitoring target, and a new alarm level is added to provide alarm information. Accumulate as. Furthermore, the reception of the bandwidth monitoring data from each node in the policy server can be used to detect the network failure of the node by determining that the operation check of the node is normal.
[0108]
As described above, in the network management system in the first embodiment, the first to fifth nodes 21 in the network 20 set by the network administrator via the administrator terminal 23 are used.₁~ 21₅The policy server 22 assigns a unique policy ID to the policy information 34 and centrally manages the QoS policy for each node together with the policy server KEY assigned in advance to the policy server 22 with reference to the node information 35. To set. Each node identifies a flow specified by the QoS policy set in the QoS parameter management table by the policy server 22 and collects bandwidth monitoring information in the QoS report management table for each policy ID. Then, a fixed time T₁Every time, the bandwidth monitoring data including the policy ID and the policy server KEY is transmitted and stored in the used bandwidth information 36 by the policy server 22. In the policy server 22, the bandwidth report processing unit 31 performs a predetermined time T.₂Each time, band analysis and alarm analysis are performed on the band monitoring data from each node. As a result, the bandwidth information for each policy in the node can be analyzed, and the operation status and the setting status for each policy set by the policy server 22 can be easily confirmed.
[0109]
Second embodiment
[0110]
In the network management system in the first embodiment, the alarm notification is generated by the alarm analysis unit of the policy server so as to notify the network administrator of the alarm. However, the present invention is not limited to this. In the network management system according to the second embodiment, the policy server is provided with an alarm notification control unit that changes the notification method according to the type of alarm information, and the person responsible for policy management is optimally adapted to the degree of urgency of the generated alarm. Alarm countermeasures can be implemented.
[0111]
Such a network management system in the second embodiment is essentially the same as the configuration of the network management system in the first embodiment shown in FIG. However, the alarm notification control described above is provided for the alarm analysis unit of the band report processing unit. Further, policy information having the following alarm notification setting information is stored instead of the policy information 34 of the policy storage DB 25 shown in FIG.
[0112]
FIG. 13 shows an example of policy information stored in the policy storage DB of the policy server in the second embodiment. In the policy information 180 in the second embodiment, a policy ID 181 is assigned to each QoS policy, and the policy name 182 and the policy 183, the condition 183, the action 184, and the occurrence of an alarm are managed in the same manner as a general QoS policy. Alarm notification setting information 185 for notifying the person in charge. The alarm notification setting information 185 includes a notification level 186, a notification destination type 187, and notification destination information 188. The notification level 186 indicates a threshold value for determining whether to perform alarm notification. The notification destination type 187 is information for specifying the type of notification destination, such as whether to notify the notification destination by e-mail or by telephone. The notification destination information 188 is information indicating the notification destination according to the type of the notification destination specified by the notification destination type 187. Here, when the notification destination type 187 is “0”, the notification destination information indicates a mobile phone number, and when it is “1”, the notification destination information indicates an e-mail address.
[0113]
When the alarm analysis unit detects the occurrence of an alarm, the alarm notification control unit added in the second embodiment first searches the policy information shown in FIG. 13 and the detected alarm level is the notification level 186. When the notification level is higher than the notification level, the policy ID of the policy in which the alarm has occurred is used as a search key, and the notification destination type and notification destination information of the administrator of the policy are acquired. Therefore, for example, when the notification destination type is “1”, policy information, alarm occurrence node information, alarm occurrence for the email address “policy_owner@abc.def.ne.jp” specified in the notification destination information Send time, alarm details, etc.
[0114]
As described above, in the network management system according to the second embodiment, the policy information in which the administrator and the notification destination are associated with the QoS policy centrally managed in the policy server is managed, and the alarm analysis result in the alarm analysis unit is displayed. Accordingly, an alarm notification control unit for notifying the notification destination specified by the policy information is provided. As a result, the person in charge of policy management can implement optimal alarm countermeasures according to the urgency of the alarm that has occurred.
[0115]
Third embodiment
[0116]
In the network management system in the third embodiment, link information between nodes is added to the node information stored in the policy storage DB of the policy server, and the bandwidth information for each policy is added to the QoS report management table of each node. In addition, the bandwidth information of all inflow and outflow traffic at each node is accumulated and stored. Each node transmits bandwidth information of the entire traffic together with bandwidth monitoring data for each policy.
[0117]
For example, “link 1” is connection information between nodes that defines “connection between IF1 of node 1 and IF2 of node 2”. It is assumed that such link information is stored in the policy server, and the association that the interface “IF1” is “link 1” is set in the node 1 in advance. Then, when the policy server sets the QoS policy set via the administrator terminal to the node set by the node information, in each node, in addition to the bandwidth information for each policy, Bandwidth information of outflow traffic is accumulated. Then, “information indicating which link is associated with traffic” is transmitted together with the bandwidth information, such as information indicating that “10 Mbps traffic has flowed out from link 1” to the policy server. In the policy server, the bandwidth report processing unit receives a specified time interval T from each node in the network 20.₁All used bandwidth data transmitted every time and bandwidth monitoring data for each policy are acquired. The policy server can perform various band analyzes for each link by using link information between newly added nodes.
[0118]
For example, the bandwidth of a link and a certain time interval T₁A bandwidth analysis report such as a graph that displays the progress of the bandwidth usage rate of the link can be created from each bandwidth usage. Also, the bandwidth analysis processing time interval T in the policy server₂The transmission time interval T of the bandwidth monitoring data of each node₁By deleting the steps S148 and S149 in FIG. 10 and making the graphed image only display, the predetermined time interval T₁The bandwidth monitoring monitor function updated every time can be realized, and the traffic monitoring independent of the policy can be easily performed.
[0119]
Furthermore, for example, when an alarm frequently occurs in a certain policy, a policy in which a part of the remaining bandwidth of the link where the alarm occurs is added to the reserved bandwidth of the policy is recreated and set in the node. As a result, it is possible to perform dynamic network management in accordance with the alarm occurrence status.
[0120]
Furthermore, for example, when the actual bandwidth used for a certain policy does not satisfy a certain standard such as 50% of the reserved bandwidth, for example, by recreating a policy with a reduced setting value of the reserved bandwidth and setting it in the node In addition, dynamic network management according to bandwidth usage can be performed.
[0121]
Here, the bandwidth usage information of the link is obtained from the two nodes, one is the outflow traffic of the node and the other is the inflow traffic of the node. There is a need to. In addition, in order to obtain band overlap data in the same time zone in a plurality of nodes, it is necessary to synchronize the acquisition timing of the band information.
[0122]
As described above, in the network management system according to the third embodiment, node information obtained by adding link information between nodes to the policy server is accumulated and stored, and the QoS report management table of each node includes each bandwidth information for each policy. The bandwidth information of the entire inflow and outflow traffic in the node is accumulated and saved, and the bandwidth information of the entire traffic is transmitted to the policy server together with the bandwidth monitoring data for each policy. This makes it possible not only to easily implement, for example, the bandwidth monitoring monitor function of traffic monitoring that does not depend on the conventional policy, but also as a judgment material for re-evaluating the policy set according to the alarm occurrence status or bandwidth usage status. Dynamic policy resetting is possible, and flexible network management can be performed.
[0123]
In the network management systems according to the first to third embodiments, the bandwidth control is mainly performed as the QoS policy. However, the present invention is not limited to this. For example, if other QoS policies such as “priority setting” and “delay parameter setting” are managed on the node, the execution result of the QoS policy from the node is notified to the policy server, and the same network is used. Management can be performed.
[0124]
【The invention's effect】
As described above, according to the present invention,For checking the policy operation status at each nodeImportant items for network operation policy such as bandwidth information and priority settings for each parameter, delay parameter settings, etc.policySince it can be recognized by the server, the network administrator does not have to consider parameter specification necessary for acquiring bandwidth information for each parameter as in the past, and it is not necessary to set a new bandwidth monitoring device separately. The cost of the system can be reduced. In particular, according to the conventional bandwidth information acquisition process, which parameter is determined at the time of traffic control and bandwidth information is acquired for each parameter. This is performed every time, and it is not necessary to newly set a flow for bandwidth information acquisition or to add processing for bandwidth information acquisition processing. Furthermore, operation information by parameter setting in the nodepolicySince it can be recognized by the server, it is possible for the network administrator to easily understand how the parameter setting affects or what actual traffic is caused by the parameter setting. For example, “Inflow trafficaboutIf the warning that the number of exceeded set traffic exceeds the specified ratio is raised, “The upper limit of the bandwidth is too low for the traffic that constantly flows in, so the upper limit of the bandwidth is increased.” It is possible to change the parameters that define the network operation policy. In addition, when a warning that “the outflow traffic exceeded the set traffic” has been raised, a fatal warning that “bandwidth control has been established but is not working” may be generated as an alarm. it can.
[0125]
Also according to the invention,The parameter identifier at the node and the identification information of the policy server in which the parameter is set are retained, and the setting status at the node is also notified when the notification is made as operation information. This can be done at the time of band information acquisition.
[0126]
Claim 2According to the described invention, the policy server and the node periodically analyze and collect the operation information from each other, and the analysis interval is performed at a period longer than the collection interval. Can be monitored.
[0127]
FurthermoreClaim 3According to the described invention, since it is only necessary to determine whether or not an alarm has occurred, the analysis processing can be simplified.
[0128]
furtherClaim 4According to the described invention, since the alarm level is provided, the network administrator can easily identify the cause of the alarm.
[0129]
FurthermoreClaim 5According to the described invention, since the use band status is graphed, it is possible to easily grasp the operation status based on the set parameters and specify the cause of the alarm in units of policy.
[0130]
furtherClaim 6According to the described invention, when the operation information corresponding to all the parameters stored in the communication quality parameter storage means is acquired, the parameter setting for the node is normally performed, and when all the information is not acquired, the parameter setting for the node is performed. Since it was judged that there was an abnormality in the settings, it is not necessary to analyze a lot of operation information one by one, it is possible to quickly know the normality of the settings of each node, reducing the processing load .
[0131]
furtherClaim 7According to the described invention, the person in charge of parameter management who defines the operation policy of the network can implement the optimum alarm countermeasures according to the urgency of the generated alarm.
[0132]
Furthermore,Claim 8According to the described invention, it becomes a judgment material for re-evaluation of a policy set in accordance with an alarm occurrence state or a band usage state, and a parameter given to a dynamic network operation state can be reset, and a flexible network Management can be performed.
[0133]
furtherClaim 9According to the described invention,Claim 8In addition to the effects of the described invention, it is possible to easily realize, for example, a bandwidth monitoring monitor function of traffic monitoring that does not depend on a conventional policy.
[Brief description of the drawings]
FIG. 1 is a configuration diagram showing an outline of a configuration of a network management system in a first embodiment of the present invention.
FIG. 2 is an explanatory diagram showing an example of policy information in the first embodiment.
FIG. 3 is an explanatory diagram illustrating an example of node setting information according to the first embodiment.
FIG. 4 is an explanatory diagram illustrating an example of node application information according to the first embodiment.
FIG. 5 is an explanatory diagram showing an example of used bandwidth information in the first embodiment.
FIG. 6 is an explanatory diagram illustrating an example of table information managed by a QoS parameter management table according to the first embodiment.
FIG. 7 is an explanatory diagram illustrating an example of table information managed by a QoS report management table according to the first embodiment.
FIG. 8 is a sequence diagram showing a flow of a series of operations from policy creation to report accumulation for monitoring the operation status in the first embodiment.
FIG. 9 is a sequence diagram showing a flow of a series of operations for confirming policy operation information from the administrator terminal in the first embodiment.
FIG. 10 is a flowchart showing an outline of processing contents of a bandwidth report processing unit in the first embodiment;
FIG. 11 is an explanatory diagram illustrating an example of a configuration of alarm information in the first embodiment.
FIG. 12 is an explanatory diagram illustrating an example of a band usage status graph that is graphed by the band analysis unit according to the first embodiment;
FIG. 13 is an explanatory diagram showing an example of policy information in the second embodiment.
FIG. 14 is a configuration diagram showing an outline of a configuration of a conventional network management system.
[Explanation of symbols]
20 network
21₁~ 21₅  1st to 5th nodes
22 Policy server
23 Administrator terminal
24 GUI application
25 Policy storage DB
26 Policy Management Department
27 Policy Server KEY
28 Policy data generator
29 DB controller
30 QoS parameter setting section
31 Bandwidth report processor
32 Alarm analyzer
33 Band Analysis Unit
34 Policy information
35 Node information
36 Bandwidth information
70₁  QoS parameter manager
71₁  Traffic control unit
72₁  QoS parameter management table
73₁  QoS report management table
74₁  Report scheduler
90₁  Flow identification part
91₁  Bandwidth monitoring unit
92₁  Bandwidth control unit

Claims (9)

Communication quality parameter storage means for storing a parameter that defines a network operation policy for guaranteeing communication quality in association with a uniquely added identifier, and a parameter stored in the communication quality parameter storage means in advance. Parameter setting means for setting each node in the predetermined network together with the assigned server identification information, operation information based on the parameter from the node where the parameter is set by the parameter setting means, an identifier for identifying the parameter, and Operation means for storing server identification information set together with the parameter for each parameter, operation information for each parameter identified by the identifier acquired by the acquisition means, identifier and server identification information Information storage Whether the parameter stored in the communication quality parameter storage means and the server identification information set by the parameter setting means match the identifier and server identification information stored in the operation information storage means Setting status determining means for determining the setting status of the parameter, and analysis processing means for performing predetermined analysis processing for each parameter for policy operation status confirmation in each node based on the operation information of the parameter A policy server;
A management table for storing parameters set by the parameter setting means and traffic designated by the parameter identified by the identifier stored in the management table are monitored, and the traffic is controlled based on the monitoring result A plurality of nodes comprising: traffic control means; and operation information notification means for notifying the policy server together with the identifier stored in the management table and the server identification information of operation information by the traffic control means for each parameter. A network management system comprising: The analysis processing means performs the predetermined analysis processing every first time interval, and the operation information notification means performs the notification every second time interval shorter than the first time interval. The network management system according to claim 1 . The operation information for each parameter notified by the operation information notification means is provided with a flag that is set when a bandwidth violation specified by the parameter occurs, and the analysis processing means is set with the flag. 3. The network management system according to claim 1, wherein an alarm is generated when the alarm is detected. Said analysis processing means, claims, characterized in that the checking the flag for each of the parameters, the frequency band violation, and generates an alarm information results Placement of the analysis in the order of the traffic data in the operation information 3. The network management system according to 3 . 5. The network management system according to claim 4 , wherein the analysis processing means further graphs the used bandwidth status based on the operation information. The setting status determining means further determines the parameter setting status for the node based on whether or not the operation information corresponding to all parameters stored in the communication quality parameter storage means has been acquired. The network management system according to claim 1, wherein: The communication quality parameter storage means corresponds to the parameter and the identifier, an alarm notification level for determining whether to perform alarm occurrence notification for each parameter in advance, and a notification when the alarm notification level is exceeded Notification destination information indicating a destination is stored, and when the alarm information is generated, an alarm notification control unit that performs alarm notification based on the alarm notification level and the notification destination information stored in the communication quality parameter storage unit is provided. The network management system according to claim 4, wherein: The policy server stores link information as connection information between the nodes in advance, and the node notifies the policy server of bandwidth information for each link corresponding to the link information, thereby determining the bandwidth usage status of the link. 3. The network management system according to claim 1 , wherein the network management system is displayed. 9. The network management system according to claim 8, wherein the policy server and the node perform the analysis processing and the notification at the same time interval.

Images