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    Monitoring Dampened BGP Routes of Specified Neighbors

    Purpose

    Display information about routes with a dampening history for the specified BGP neighbor. Report whether the indirect next hop of a route is unreachable; if not, display the IGP cost to the indirect next hop.

    The show ip bgp neighbors dampened-routes and show bgp ipv6 neighbors dampened-routes commands display similar information.

    Action

    To display information about routes with a dampening history for the specified BGP neighbor:

    host1#show ip bgp neighbors 192.168.1.158 dampened-routes
    Local BGP identifier 192.168.1.232, local AS 100
      120 routes (5760 bytes used), 94 distinct destinations (9024 bytes used)
      67 routes selected for route table installation
      23 path attribute entries (3450 bytes used)
    
    Status codes: > best, * invalid, s suppressed, d dampened, r rejected
    
      Prefix             Peer            Next-hop MED LocPrf Weight Origin
     d12.8.12.0/24       192.168.1.158   192.168.1.1              0 IGP
     d24.48.12.0/24      192.168.1.158   192.168.1.1              0 IGP
     d24.72.12.0/24      192.168.1.158   192.168.1.1              0 inc.
     d24.116.12.0/23     192.168.1.158   192.168.1.1              0 IGP
     d24.143.12.0/24     192.168.1.158   192.168.1.1              0 IGP
     d24.154.12.0/24     192.168.1.158   192.168.1.1              0 inc.
     d24.216.12.0/24     192.168.1.158   192.168.1.1              0 IGP
     d24.240.12.0/24     192.168.1.158   192.168.1.1              0 IGP
     d24.244.12.0/22     192.168.1.158   192.168.1.1              0 IGP
     d24.246.12.0/22     192.168.1.158   192.168.1.1              0 IGP
     d61.0.12.0/24       192.168.1.158   192.168.1.1              0 IGP
     d61.11.12.0/24      192.168.1.158   192.168.1.1              0 IGP
     d62.74.12.0/22      192.168.1.158   192.168.1.1              0 IGP
     d62.76.12.0/22      192.168.1.158   192.168.1.1              0 IGP
     d63.65.12.0/24      192.168.1.158   192.168.1.1              0 inc.
     d63.73.12.0/24      192.168.1.158   192.168.1.1              0 IGP

    Meaning

    Table 1 lists the show ip bgp neighbors dampened-routes command output fields.

    Table 1: show ip bgp neighbors dampened-routes Output Fields

    Field Name

    Field Description

    Local BGP identifier

    BGP router ID of the local router

    local AS

    Local autonomous system number

    routes

    Total number of routes stored in the BGP routing table and amount of memory consumed by routes. If several peers have advertised a route to the same prefix, all routes are included in this count.

    distinct destinations

    Number of routes to unique prefixes stored in the BGP routing table. If several peers have advertised a route to the same prefix, only the best route is included in this count.

    routes selected for route table installation

    Number of routes in the BGP routing table that have been inserted into the IP routing table

    path attribute entries

    Number of distinct path attributes stored in BGP's internal path attributes table. If BGP receives two routes for different prefixes but with identical path attributes, BGP will create only one entry in its internal path attribute table and share it between the two routes to conserve memory.

    Prefix

    Prefix for the routing table entry

    Peer

    IP address of BGP peer

    Next hop IP address

    IP address of the next hop

    MED

    Multiexit discriminator for the route

    LocPrf

    Local preference for the route

    Weight

    Assigned path weight

    Origin

    Origin of the route

    Published: 2014-08-18