Help us improve your experience.

Let us know what you think.

Do you have time for a two-minute survey?

Navigation
Guide That Contains This Content
[+] Expand All
[-] Collapse All

    Monitoring BGP-Related Settings for VPWS L2VPNS

    Purpose

    This section provides examples of some of the show ip bgp commands that you can use to monitor VPWS configurations.

    You can use the show ip bgp commands listed in Table 1 to display BGP-related settings for VPWS instances in the L2VPN address family. The l2vpn all keywords display both all VPWS instances and all VPLS instances in the L2VPN address family

    Table 1: Commands for Monitoring BGP Settings for the VPWS Address Family

    show ip bgp advertised-routes

    show ip bgp neighbors received-routes

    show ip bgp l2vpn all

    show ip bgp neighbors routes

    show ip bgp neighbors

    show ip bgp peer-group

    show ip bgp neighbors dampened-routes

     

    You can use the show ip bgp commands listed in Table 2 to display BGP-related settings for L2VPNs. Specify l2vpn vpws vpwsName to display information about only the VPWS instances in the VPWS address family. Specify l2vpn all to display information about all VPWS instances in the VPWS address family and all VPLS instances in the VPLS address family.

    Table 2: Commands for Monitoring BGP Settings for the VPWS Address Family

    show ip bgp

    show ip bgp l2vpn vpws

    show ip bgp community

    show ip bgp next-hops

    show ip bgp community-list

    show ip bgp paths

    show ip bgp dampened-paths

    show ip bgp quote-regexp

    show ip bgp filter-list

    show ip bgp regexp

    show ip bgp flap-statistics

    show ip bgp summary

    For more information about using the show ip bgp commands that are not described in this section, see the Configuring BGP Routing and Configuring BGP-MPLS Applications chapters of JunosE BGP and MPLS Configuration Guide.

    Display layer 2 NLRI for all VPWS instances in the L2VPN address family, for a particular VPWS instance in the L2VPN address family, or for a particular VPWS instance in the VPWS address family.

    The l2vpn vpws keywords display layer 2 NLRI for a particular VPWS instance in the VPWS address family.

    The l2vpn all keywords display layer 2 NLRI for all VPWS instances in the L2VPN address family. The output for this version of the command also includes information about any VPLS instances configured in the L2VPN address family.

    To display layer 2 NLRI for the route that matches a specified prefix (site ID and block offset) in the L2VPN address family or in the VPWS address family, use the site-id and block-offset keywords.

    Action

    To display information for a particular L2VPN instance in the L2VPN address family:

    host1:pe1# show ip bgp l2vpn vpws l2vpn1
    Local BGP identifier 10.1.1.1, local AS 100
      2 routes (152 bytes)
      2 destinations (152 bytes) of which 2 have a route
      2 routes selected for route tables installation
      0 unicast/multicast routes selected for route table installation
      0 unicast/multicast tunnel-usable routes selected for route table installation
      0 tunnel-only routes selected for tunnel-route table installation
      4 path attribute entries (608 bytes)
      Local-RIB version 6. FIB version 6.
    Status codes: > best, * invalid, s suppressed, d dampened, r rejected,
                  a auto-summarized m multihomed-backup
      Prefix      Peer            Next-hop         MED LocPrf Weight Origin
    > 1:1         0.0.0.0         self                           0    IGP    
    > 2:1         12.2.2.2        12.2.2.2              100      0    IGP    
    

    To display summary information for a particular VPWS instance in the VPWS address family; only the BGP operational state is useful:

    host1:pe1# show ip bgp l2vpn vpws l2vpn1 summary
    Local router ID 10.1.1.1, local AS 100
      Administrative state is Start
      BGP Operational state is Up
      Shutdown in overload state is disabled
      Default local preference is 100
      Default originate is disabled
      Always compare MED is disabled
      Compare MED within confederation is disabled
      Advertise inactive routes is disabled
      Advertise best external route to internal peers is disabled
      Enforce first AS is disabled
      Missing MED as worst is disabled
      Route flap dampening is disabled
      Log neighbor changes is disabled
      Fast External Fallover is disabled
      No maximum received AS-path length
      BGP administrative distances are 20 (ext), 200 (int), and 200 (local)
      Client-to-client reflection is enabled
      Cluster ID is not configured (local router ID used)
      Route-target filter is enabled
      Default IPv4-unicast is enabled
      Redistribution of iBGP routes is disabled
      Graceful restart is globally disabled
      Global graceful-restart restart time is 120 seconds
      Global graceful-restart stale paths time is 360 seconds
      Graceful-restart path selection defer time is 360 seconds
      Graceful-restart is not ready to switch to the standby SRP
      The last restart was not graceful
      Local-RIB version 6. FIB version 6.
      (No neighbors are configured)
    

    To display information for the route that matches the specified prefix (2:1) for a VPWS instance named customer1 in the VPWS address family:

    host1#show ip bgp l2vpn vpws customer1 site-id 2 block-offset 1
    
    BGP route information for prefix 2:1
      Received route learned from internal peer 10.2.2.2 (best route)
        Leaked route
        Route placed in IP forwarding table
        Best to advertise to external peers
        Address Family Identifier (AFI) is layer2
        Subsequent Address Family Identifier (SAFI) is unicast
        Route Distinguisher (RD) is 100:11
        Original Route Distinguisher (RD) is 100:21
        MPLS in-label is none
        MPLS in-label block size is 0
        MPLS out-label is 46
        MPLS out-label block size is 20
        Next hop IP address is 2.2.2.2 (metric 3)
        Multi-exit discriminator is not present
        Local preference is 100
        Weight is 0
        Origin is IGP
        AS path is empty
        Extended communities RT:100:1 Layer 2:19:00:0

    To display information for all instances that support a multihomed site with site ID 2 and block offset 1:

    host1:pe1#show ip bgp l2vpn all site-id 2 block-offset 1
    BGP route information for prefix 2:1
    Received route learned from internal peer 2.2.2.2 (best route)
       Route not placed in PW table
       Best to advertise to external peers
       Suppressed by multihoming
       Address Family Identifier (AFI) is layer2
       Subsequent Address Family Identifier (SAFI) is vpn-unicast
       Route Distinguisher (RD) is 100:23
       Original Route Distinguisher (RD) is 100:23
       MPLS in-label is none
       MPLS in-label block size is 0
       MPLS out-label is 106
       MPLS out-label block size is 10
       Next hop IP address is 2.2.2.2 (metric 3)
       Multi-exit discriminator is not present
       Local preference is 100
       Weight is 0
       Origin is IGP
       AS path is empty
       Extended communities RT:100:3 Layer2:atm-vcc-cell:use-cw,use-seq,:mtu=0
       Status Vector 0x7fc0
    

    Meaning

    Table 3 lists the show ip bgp l2vpn command output fields

    Table 3: show ip bgp l2vpn Output Fields

    Field Name

    Field Description

    Local BGP identifier

    IP address of the local PE router

    local AS

    Autonomous system number

    Local-RIB version

    Version number of the local routing information base

    FIB version

    Version number of the forwarding information base

    Status codes

    Status codes for the route, listed before the Prefix:

    • >—best route
    • *—invalid route
    • s—suppressed route
    • d—dampened route
    • r—rejected route
    • a—auto-summarized
    • m—multihomed backup route

    Prefix

    Route prefix in the format siteID:blockOffset

    Peer

    IP address of the peer from which the route was learned

    Next-hop (or Next hop IP address)

    IP address of the next router that is used when a packet is forwarded to the destination network

    MED

    Multiexit discriminator for the route

    LocPrf

    Local preference for the route

    Weight

    Weight of the route

    Origin

    Origin of the route

    AS Path

    AS path through which this route has been advertised

    Extended communities

    Description of the L2VPN extended communities that the router uses to determine which routes are imported by the specified VPWS instance. Includes route target, community type, encapsulation, control word and sequencing use, L2VPN link MTU.

    BGP Operational state

    Operational state, up or down

    Status Vector

    Hexadecimal representation of the status vector bits attached to the route

    Modified: 2015-10-28