IP Routing: BGP Configuration Guide, Cisco IOS XE Release 3S
BGP Monitoring Protocol
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BGP Monitoring Protocol

BGP Monitoring Protocol

The BGP Monitoring Protocol (BMP) feature supports the following functionality to monitor Border Gateway Protocol (BGP) neighbors, also called BMP clients:
  • Configure devices to function as BMP servers, and set up parameters on the servers, that are required for monitoring of the BGP neighbors.
  • Establish connectivity of the BMP servers with BGP neighbors for monitoring.
  • Generate statistics report from monitoring the BGP neighbors.
  • Perform appropriate error handling on the BGP neighbors.
  • Graceful scale up and degradation to the point of closing connectivity between the BMP servers and BGP neighbors.

Finding Feature Information

Your software release may not support all the features documented in this module. For the latest caveats and feature information, see Bug Search Tool and the release notes for your platform and software release. To find information about the features documented in this module, and to see a list of the releases in which each feature is supported, see the feature information table at the end of this module.

Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

Prerequisites for BGP Monitoring Protocol

Before you configure BGP Monitoring Protocol (BMP) servers, you must configure Border Gateway Protocol (BGP) neighbors, which function as BMP clients, and establish a session with its peers using either IPv4/IPv6 or VPNv4/VPNv6 address-family identifiers.

Information About BGP Monitoring Protocol

BGP Monitoring Protocol Overview

The BGP Monitoring Protocol (BMP) feature enables monitoring of BGP neighbors (called BMP clients). You can configure a device to function as a BMP server, which monitors either one or several BMP clients, which in turn, has several active peer sessions configured. You can also configure a BMP client to connect to one or more BMP servers. The BMP feature enables configuration of multiple BMP servers (configured as primary servers) to function actively and independent of each other, simultaneously to monitor BMP clients.

Each BMP server is specified by a number and you can use command-line interface (CLI) to configure parameters such as IP address, port number, and so on. Upon activation of a BMP server, it attempts to connect to BMP clients by sending an initiation message. The CLI enables multiple—independent and asynchronous—BMP server connections.

BGP neighbors, called BMP clients, are configured to send data to specific BMP servers for monitoring purposes. These clients are configured in a queue. When a request for a connection arrives from BMP clients to BMP servers, the connection is established based on the order in which the requests arrived. Once the BMP server connects with the first BMP neighbor, it sends out refresh requests to monitor the BMP clients and starts monitoring those BMP clients with whom the connection is already established.

The session connection requests from the other BMP clients in queue to the BMP servers initiates after an initial delay that you can configure using the initial-delay command. If a connection establishes but fails later, due to some reason, the connection request is retried after a delay, which you can configure using failure-retry-delay command. If there is repeated failure in connection establishment, the connection retries are delayed based on the delay configured using the flapping-delay command. Configuring the delay for such requests becomes significant because the route refresh requests that are sent to all connected BMP clients causes considerable network traffic and load on the device.

To avoid excessive load on the device, the BMP servers sends route refresh requests to individual BMP clients at a time, in the order in which connections are established in the queue. Once a BMP client that is already connected is in the “reporting” state, it sends a “peer-up” message to the BMP server. After the client receives a route-refresh request, route monitoring begins for that neighbor. Once the route refresh request ends, the next neighbor in the queue is processed. This cycle continues until all “reporting” BGP neighbors are reported and all routes sent by these “reporting” BGP neighbors are continuously monitored. If a neighbor establishes after BMP monitoring has begun, it does not require a route-refresh request. All received routes from that client is sent to BMP servers.

It is advantageous to batch up refresh requests from BMP clients, if several BMP servers are activated in quick succession. Use the bmp initial-refresh delay command to configure a delay in triggering the refresh mechanism when the first BMP server comes up. If other BMP servers come online within this time-frame, only one set of refresh requests is sent to the BMP clients. You can also configure the bmp initial-refresh skip command to skip all refresh requests from BMP servers and just monitor all incoming messages from the peers.

In a client-server configuration, it is recommended that the resource load of the devices be kept minimal and adding excessive network traffic must be avoided. In the BMP configuration, you can configure various delay timers on the BMP server to avoid flapping during connection between the server and client. To avoid excessive message throughput or high usage of system resources, you can configure the maximum buffer limit for the BMP session.

How to Configure BGP Monitoring Protocol

Configuring a BGP Monitoring Protocol Session

Perform this task to configure BGP Monitoring Protocol (BMP) session parameters for the BMP servers to establish connectivity with BMP clients.

SUMMARY STEPS

    1.    enable

    2.    configure terminal

    3.    router bgp as-number

    4.    bmp {buffer-size buffer-bytes | initial-refresh {delay refresh-delay | skip} | server server-number-n

    5.    end


DETAILED STEPS
     Command or ActionPurpose
    Step 1 enable


    Example:
    Device> enable
     

    Enables privileged EXEC mode.

    • Enter your password if prompted.

     
    Step 2 configure terminal


    Example:
    Device# configure terminal
     

    Enters global configuration mode.

     
    Step 3 router bgp as-number


    Example:
    Device(config)# router bgp 65000
     

    Enters router configuration mode and creates a BGP routing process.

     
    Step 4bmp {buffer-size buffer-bytes | initial-refresh {delay refresh-delay | skip} | server server-number-n


    Example:
    Device(config-router)# bmp initial-refresh delay 30
     

    Configures BMP parameters for BGP neighbors and enters BMP server configuration mode to configure BMP servers.

     
    Step 5 end


    Example:
    Device(config-router)# end
     

    Returns to privileged EXEC mode.

     

    Configuring BGP Monitoring Protocol on BGP Neighbors

    Perform this task to activate BGP Monitoring Protocol (BMP) on BGP neighbors (also called BMP clients) so that the client activity is monitored by the BMP server configured on the neighbor.

    SUMMARY STEPS

      1.    enable

      2.    configure terminal

      3.    router bgp as-number

      4.    neighbor {ipv4-addr | neighbor-tag | ipv6-addr} bmp-activate {all | server server-number-1 [server server-number-2 . . . [server server-number-n]]}

      • Repeat Steps 1 to 4 to configure other BMP clients in the session.

      5.    end


    DETAILED STEPS
       Command or ActionPurpose
      Step 1 enable


      Example:
      Device> enable
       

      Enables privileged EXEC mode.

      • Enter your password if prompted.

       
      Step 2 configure terminal


      Example:
      Device# configure terminal
       

      Enters global configuration mode.

       
      Step 3 router bgp as-number


      Example:
      Device(config)# router bgp 65000
       

      Enters router configuration mode and creates a BGP routing process.

       
      Step 4neighbor {ipv4-addr | neighbor-tag | ipv6-addr} bmp-activate {all | server server-number-1 [server server-number-2 . . . [server server-number-n]]}
      • Repeat Steps 1 to 4 to configure other BMP clients in the session.


      Example:
      Device(config-router)# neighbor 30.1.1.1 bmp-activate server 1 server 2
       

      Activates BMP monitoring on a BGP neighbor.

       
      Step 5 end


      Example:
      Device(config-router)# end
       

      Returns to privileged EXEC mode.

       

      Configuring BGP Monitoring Protocol Servers

      Perform this task to configure BGP Monitoring Protocol (BMP) servers and its parameters in BMP server configuration mode.

      SUMMARY STEPS

        1.    enable

        2.    configure terminal

        3.    router bgp as-number

        4.    bmp {buffer-size buffer-bytes | initial-refresh {delay refresh-delay | skip} | server server-number-n

        5.    activate

        6.    address {ipv4-addr | ipv6-addr} port-number port-number

        7.    description LINE server-description

        8.    failure-retry-delay failure-retry-delay

        9.    flapping-delay flap-delay

        10.    initial-delay initial-delay-time

        11.    set ip dscp dscp-value

        12.    stats-reporting-period report-period

        13.    update-source interface-type interface-number

        14.    exit-bmp-server-mode

        • Repeat Steps 1 to 14 to configure other BMP servers in the session.

        15.    end


      DETAILED STEPS
         Command or ActionPurpose
        Step 1 enable


        Example:
        Device> enable
         

        Enables privileged EXEC mode.

        • Enter your password if prompted.

         
        Step 2 configure terminal


        Example:
        Device# configure terminal
         

        Enters global configuration mode.

         
        Step 3 router bgp as-number


        Example:
        Device(config)# router bgp 65000
         

        Enters router configuration mode and creates a BGP routing process.

         
        Step 4bmp {buffer-size buffer-bytes | initial-refresh {delay refresh-delay | skip} | server server-number-n


        Example:
        Device(config-router)# bmp server 1
         

        Enters BMP server configuration mode to configure BMP servers.

         
        Step 5 activate


        Example:
        Device(config-router-bmpsrvr)# activate
         

        Initiates a connection between BMP server and BGP neighbors.

         
        Step 6 address {ipv4-addr | ipv6-addr} port-number port-number


        Example:
        Device(config-router-bmpsrvr)# address 10.1.1.1 port-number 8000
         

        Configures IP address and port number to a specific BMP server.

         
        Step 7 description LINE server-description


        Example:
        Device(config-router-bmpsrvr)# description LINE SERVER1
         

        Configures a textual description of a BMP server.

         
        Step 8 failure-retry-delay failure-retry-delay


        Example:
        Device(config-router-bmpsrvr)# failure-retry-delay 40
         

        Configures delay in the retry requests during failures when sending BMP server updates.

         
        Step 9 flapping-delay flap-delay


        Example:
        Device(config-router-bmpsrvr)# flapping-delay 120
         

        Configures delays in flapping when sending BMP server updates.

         
        Step 10 initial-delay initial-delay-time


        Example:
        Device(config-router-bmpsrvr)# initial-delay 20
         

        Configures delays in sending initial requests for updates from the BMP servers.

         
        Step 11 set ip dscp dscp-value


        Example:
        Device(config-router-bmpsrvr)# set ip dscp 5
         

        Configures the IP Differentiated Services Code Point (DSCP) values for BMP servers.

         
        Step 12 stats-reporting-period report-period


        Example:
        Device(config-router-bmpsrvr)# stats-reporting-period 30
         

        Configures the time interval in which the BMP server receives the statistics report from BGP neighbors.

         
        Step 13 update-source interface-type interface-number


        Example:
        Device(config-router-bmpsrvr)# update-source ethernet 0/0
         

        Configures the interface source for routing updates on the BMP servers.

         
        Step 14 exit-bmp-server-mode
        • Repeat Steps 1 to 14 to configure other BMP servers in the session.


        Example:
        Device(config-router-bmpsrvr)# exit-bmp-server-mode
         

        Exits from BMP server configuration mode and returns to router configuration mode.

         
        Step 15 end


        Example:
        Device(config-router)# end
         

        Returns to privileged EXEC mode.

         

        Verifying BGP Monitoring Protocol

        Perform the following steps to verify the configuration for the BGP Monitoring Protocol (BMP) servers and BMP clients:

        SUMMARY STEPS

          1.    enable

          2.    show ip bgp bmp

          3.    show running-config


        DETAILED STEPS
           Command or ActionPurpose
          Step 1 enable


          Example:
          Device> enable
           

          Enables privileged EXEC mode.

          • Enter your password if prompted.

           
          Step 2 show ip bgp bmp


          Example:
          Device# show ip bgp bmp neighbors
           

          Displays information about BMP servers and neighbors.

           
          Step 3 show running-config


          Example:
          Device# show running-config | section bmp
           

          Displays information about BMP servers and neighbors.

           

          Monitoring BGP Monitoring Protocol

          Perform the following steps to enable debugging and monitor the BGP Monitoring Protocol (BMP) servers.

          SUMMARY STEPS

            1.    enable

            2.    debug ip bgp bmp

            3.    show debugging


          DETAILED STEPS
             Command or ActionPurpose
            Step 1 enable


            Example:
            Device> enable
             

            Enables privileged EXEC mode.

            • Enter your password if prompted.

             
            Step 2 debug ip bgp bmp


            Example:
            Device# debug ip bgp bmp server
             

            Enables debugging of the BMP attributes.

             
            Step 3 show debugging


            Example:
            Device# show debugging
             

            Displays information about the types of debugging that are enabled on a device.

             

            Configuration Examples for BGP Monitoring Protocol

            Examples for Configuring, Verifying, and Monitoring BGP Monitoring Protocol

            Examples: Configuring BGP Monitoring Protocol


            Note


            There are two levels of configuration required for the BGP Monitoring Protocol (BMP) to function as designed. You must enable BMP monitoring on each BGP neighbor (also called BMP client) to which several peers are connected in a network, and establish connectivity between the BMP servers and clients. Then, configure each BMP server in BMP server configuration mode for a specific server with the parameters required for monitoring the associated BMP clients.

            The following example shows how to activate BMP on a neighbor with IP address 30.1.1.1, which is monitored by BMP servers (in this case, server 1 and 2):

            Device> enable
            Device# configure terminal
            Device(config)# router bgp 65000
            Device(config-router)# neighbor 30.1.1.1 bmp-activate server 1 server 2
            Device(config-router)# end
            

            The following example shows how to configure initial refresh delay of 30 seconds for BGP neighbors on which BMP is activated using the neighbor bmp-activate command:

            Device> enable
            Device# configure terminal
            Device(config)# router bgp 65000
            Device(config-router)# bmp initial-refresh delay 30
            Device(config-router)# bmp buffer-size 2048
            Device(config-router)# end
            

            The following example show how to enter BMP server configuration mode and initiate connection between a specific BMP server with the BGP BMP neighbors. In this example, connection to clients is initiated from BMP servers 1 and 2 along with configuration of the monitoring parameters:

            Device> enable
            Device# configure terminal
            Device(config)# router bgp 65000
            Device(config-router)# bmp server 1
            Device(config-router-bmpsrvr)# activate
            Device(config-router-bmpsrvr)# address 10.1.1.1 port-number 8000
            Device(config-router-bmpsrvr)# description LINE SERVER1
            Device(config-router-bmpsrvr)# failure-retry-delay 40
            Device(config-router-bmpsrvr)# flapping-delay 120
            Device(config-router-bmpsrvr)# initial-delay 20
            Device(config-router-bmpsrvr)# set ip dscp 5
            Device(config-router-bmpsrvr)# stats-reporting-period 30
            Device(config-router-bmpsrvr)# update-source ethernet 0/0
            Device(config-router-bmpsrvr)# exit-bmp-server-mode
            Device(config-router)# bmp server 2
            Device(config-router-bmpsrvr)# activate
            Device(config-router-bmpsrvr)# address 20.1.1.1 port-number 9000
            Device(config-router-bmpsrvr)# description LINE SERVER2
            Device(config-router-bmpsrvr)# failure-retry-delay 40
            Device(config-router-bmpsrvr)# flapping-delay 120
            Device(config-router-bmpsrvr)# initial-delay 20
            Device(config-router-bmpsrvr)# set ip dscp 7
            Device(config-router-bmpsrvr)# stats-reporting-period 30
            Device(config-router-bmpsrvr)# update-source ethernet 2/0
            Device(config-router-bmpsrvr)# exit-bmp-server-mode
            Device(config-router)# end
            

            The following is sample output from the show ip bgp bmp server command for server number 1. The attributes displayed are configured in the BMP server configuration mode:

            Device# show ip bgp bmp server 1
            
            Print detailed info for 1 server number 1.
            
            bmp server 1
            address: 10.1.1.1    port 8000
            description SERVER1
            up time 00:06:22
            session-startup route-refresh
            initial-delay 20
            failure-retry-delay 40
            flapping-delay 120
            activated
            

            The following is sample output from the show ip bgp bmp server command for server number 2. The attributes displayed are configured in the BMP server configuration mode:

            Device# show ip bgp bmp server 2
            
            Print detailed info for 1 server number 2.
            
            bmp server 2
            address: 20.1.1.1    port 9000
            description SERVER2
            up time 00:06:23
            session-startup route-refresh
            initial-delay 20
            failure-retry-delay 40
            flapping-delay 120
            activated
            

            The following is sample output from the show ip bgp bmp server summary command after deactivating the BMP server 1 and 2 connections:

            Device# show ip bgp bmp server summary
            
            Number of BMP servers configured: 2
            Number of BMP neighbors configured: 10
            Number of neighbors on TransitionQ: 0, MonitoringQ: 0, ConfigQ: 0
            Number of BMP servers on StatsQ: 0
            BMP Refresh not in progress, refresh not scheduled
            Initial Refresh Delay configured, refresh value 30s
            BMP buffer size configured, buffer size 2048 MB, buffer size bytes used 0 MB
            
            ID Host/Net          Port  TCB                 Status  Uptime    MsgSent   LastStat
            1  10.1.1.1          8000  0x0                 Down              0           
            2  20.1.1.1          9000  0x0                 Down              0           
            
            

            The following is sample output from the show ip bgp bmp neighbors command, which shows the status of the BGP BMP neighbors after reactivating the BMP server 1 and 2 connections:

            Device# show ip bgp bmp server neighbors
            
            Number of BMP neighbors configured: 10
            BMP Refresh not in progress, refresh not scheduled
            Initial Refresh Delay configured, refresh value 30s
            BMP buffer size configured, buffer size 2048 MB, buffer size bytes used 0 MB
            
            Neighbor           PriQ      MsgQ      CfgSvr#             ActSvr#             RM Sent
            30.1.1.1           0         0         1  2                1  2                16      
            2001:DB8::2001     0         0         1  2                1  2                15      
            40.1.1.1           0         0         1  2                1  2                26      
            2001:DB8::2002     0         0         1  2                1  2                15      
            50.1.1.1           0         0         1  2                1  2                16      
            60.1.1.1           0         0         1  2                1  2                26      
            2001:DB8::2002     0         0         1                   1                   9       
            70.1.1.1           0         0         2                   2                   12      
            Neighbor           PriQ      MsgQ      CfgSvr#             ActSvr#             RM Sent
            80.1.1.1           0         0         1                   1                   10      
            2001:DB8::2002     0         0         1  2                1  2                16      
            

            The following is sample output from the show ip bgp bmp server command for BMP server number 1 and 2. The statistics reporting interval on BMP server 1 and 2 has been set to 30 seconds, therefore each server receives statistics messages from its connected BGP BMP neighbor in each cycle of 30 seconds:

            Device# show ip bgp bmp server summary
            
            Number of BMP servers configured: 2
            Number of BMP neighbors configured: 10
            Number of neighbors on TransitionQ: 0, MonitoringQ: 0, ConfigQ: 0
            Number of BMP servers on StatsQ: 0
            BMP Refresh not in progress, refresh not scheduled
            Initial Refresh Delay configured, refresh value 30s
            BMP buffer size configured, buffer size 2048 MB, buffer size bytes used 0 MB
            
            ID Host/Net          Port  TCB                 Status  Uptime    MsgSent   LastStat
            1  10.1.1.1          8000  0x2A98B07138        Up      00:38:49  162       00:00:09 
            2  20.1.1.1          9000  0x2A98E17C88        Up      00:38:49  46        00:00:04
            
            
            Device# show ip bgp bmp server summary
            
            Number of BMP servers configured: 2
            Number of BMP neighbors configured: 10
            Number of neighbors on TransitionQ: 0, MonitoringQ: 0, ConfigQ: 0
            Number of BMP servers on StatsQ: 0
            BMP Refresh not in progress, refresh not scheduled
            Initial Refresh Delay configured, refresh value 30s
            BMP buffer size configured, buffer size 2048 MB, buffer size bytes used 0 MB
            
            ID Host/Net          Port  TCB                 Status  Uptime    MsgSent   LastStat
            1  10.1.1.1          8000  0x2A98B07138        Up      00:40:19  189       00:00:07 
            2  20.1.1.1          9000  0x2A98E17C88        Up      00:40:19  55        00:00:02 
            

            Note


            If we configure several BGP BMP neighbors to be monitored by the BMP servers, for example 10, then 10 statistics messages are received by both servers in each periodic cycle that is configured.

            The following is sample output from the show running-config command, which shows the running configuration on the device:

            Device# show running-config | section bmp
            
            bmp server 1
            address 10.1.1.1 port-number 8000
            description SERVER1
            initial-delay 20
            failure-retry-delay 40
            flapping-delay 120
            update-source Ethernet0/0
            set ip dscp 3
            activate
            exit-bmp-server-mode
            bmp server 2
            address 20.1.1.1 port-number 9000
            description SERVER2
            initial-delay 20
            failure-retry-delay 40
            flapping-delay 120
            update-source Ethernet2/0
            set ip dscp 5
            activate
            exit-bmp-server-mode
            bmp initial-refresh delay 30
            bmp-activate all
            
            

            The following example shows how to enable debugging of the various BMP attributes:

            Device# debug ip bgp bmp event
            
            BGP BMP events debugging is on
            
            Device# debug ip bgp bmp neighbor
            
            BGP BMP neighbor debugging is on
            
            Device# debug ip bgp bmp server
            
            BGP BMP server debugging is on
            

            The following is sample output from the show debugging command after you enable the BGP BMP server debugging:

            Device# show debugging
            
            IP routing:
            BGP BMP server debugging is on
            
            Device#
            
            *Apr  8 21:04:13.164: BGPBMP: BMP server connection attempt timer expired for server 1 - 10.1.1.1/8000
            *Apr  8 21:04:13.165: BGPBMP: BMP server 1 active open process success - 10.1.1.1/8000
            *Apr  8 21:04:13.165: BGPBMP: TCP KA interval is set to 15
            
            Device#
            
            *Apr  8 21:04:15.171: BGPBMP: Register read/write notification callbacks with BMP server 1 TCB - 10.1.1.1/8000
            *Apr  8 21:04:15.171: BGPBMP: Initiation msg sent to BMP server 1 - 10.1.1.1/8000
            *Apr  8 21:04:15.171: BGPBMP: BMP server 1 connection - 10.1.1.1/8000 up, invoke refresh event
            
            Device#
            
            *Apr  8 21:04:16.249: BGPBMP: BMP server connection attempt timer expired for server 2 - 20.1.1.1/9000
            *Apr  8 21:04:16.249: BGPBMP: BMP server 2 active open process success - 20.1.1.1/9000
            *Apr  8 21:04:16.249: BGPBMP: TCP KA interval is set to 15
            *Apr  8 21:04:16.250: BGPBMP: Register read/write notification callbacks with BMP server 2 TCB - 20.1.1.1/9000
            *Apr  8 21:04:16.250: BGPBMP: Initiation msg sent to BMP server 2 - 20.1.1.1/9000
            *Apr  8 21:04:16.250: BGPBMP: BMP server 2 connection - 20.1.1.1/9000 up, invoke refresh event
            

            Additional References for BGP Monitoring Protocol

            Related Documents

            Related Topic Document Title

            Cisco IOS commands

            Cisco IOS Master Command List, All Releases

            BGP commands

            Cisco IOS IP Routing: BGP Command Reference

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            Feature Information for BGP Monitoring Protocol

            The following table provides release information about the feature or features described in this module. This table lists only the software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

            Use Cisco Feature Navigator to find information about platform support and Cisco software image support. To access Cisco Feature Navigator, go to www.cisco.com/​go/​cfn. An account on Cisco.com is not required.

            Table 1 Feature Information for BGP Monitoring Protocol

            Feature Name

            Releases

            Feature Description

            BGP Monitoring Protocol

            Cisco IOS XE Release 3.11S

            The BMP feature supports the following functionality to enable monitoring of the Border Gateway Protocol (BGP) neighbors, which become BMP clients:
            • Configure devices to function as BMP servers, and set up parameters on the servers, that are required for monitoring of the BGP neighbors.
            • Establish connectivity of the BMP servers with BGP neighbors for monitoring.
            • Generate statistics report from monitoring the BGP neighbors.
            • Perform appropriate error handling on the BGP neighbors.
            • Graceful scale up and degradation to the point of closing connectivity between the BMP servers and BGP neighbors.

            The following commands were introduced or modified:

            bmp

            debug ip bgp bmp

            neighbor bmp-activate

            show ip bgp bmp

            The following commands were introduced in BMP server configuration mode, to configure specific BMP servers:

            activate

            address

            default

            description

            exit-bmp-server-mode

            failure-retry-delay

            flapping-delay

            initial-delay

            set ip dscp

            stats-reporting-period

            update-source