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    Setting the Default BGP Routing Table Output Fields

    Purpose

    Specify fields that are displayed by default by any subsequently issued show ip bgp command that displays the BGP routing table.

    You can use the intro keyword to enable the display of introductory information about BGP attributes. The order in which you specify the fields has no effect on the order in which they are displayed.

    Action

    To specify the default output fields while displaying the BGP routes:

    host1:pe2(config-router)#default-fields route intro next-hop med loc-pref 
    weight as-path
    host1:pe2#show ip bgp vpnv4 all
    Local BGP identifier 2.2.2.2, local AS 100
     6 routes (388 bytes)
     7 destinations (560 bytes) of which 0 have a route
     0 routes selected for route table installation
     6 path attribute entries (936 bytes)
     Local-RIB version 74. FIB version 74. 
    
    Prefix           Next-hop   MED  LocPrf  Weight  AS-path
    99.99.99.11/32   1.1.1.1    1    100     0       65011
    99.99.99.12/32   1.1.1.1    0    100     0       empty
    99.99.99.13/32   1.1.1.1    2    100     0       empty
    99.99.99.21/32   21.21.21.2 1    0               65021
    99.99.99.22/32   22.22.22.2 0    32768           empty
    99.99.99.23/32   23.23.23.2 2    32768           empty

    Meaning

    Table 1 lists the show ip bgp command output fields.

    Table 1: show ip bgp 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.

    destinations

    Number of routes to unique prefixes stored in the BGP routing table and amount of memory consumed by routes. 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been inserted into the IP routing table, plus prefixes for which there are currently no routes but which have had to be withdrawn from peers to which these prefixes may been previously advertised.

    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.

    Local-RIB version

    Number that is increased by one each time a route in that RIB is added, removed or modified.

    FIB version

    Number that is increased by one each time BGP updates the routes in the IP routing table based on changes in the local RIB. The FIB version matches the local-RIB version when BGP has finished updating the routes in the IP route table. The FIB version is less than the local-RIB version when BGP is still in the process of updating the IP routing table.

    Prefix

    Prefix for the routing table entry

    Peer

    Peer from which route was learned

    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

    Communities

    Community number associated with the route

    Stale

    Routes that have gone stale due to peer restart

    unicast/multicast routes selected for route table installation

    Number of unicast routes in the BGP routing table that have been inserted into the IP routing table that are also available for use in the multicast view of the IP routing table

    unicast/multicast tunnel-usable routes selected for route table installation

    Number of unicast and multicast routes in the BGP routing table that have been inserted into the IP routing table that are also available for use in the IP tunnel routing table

    tunnel-only routes selected for tunnel-route table installation

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

    Statistics baseline set

    Timestamp indicating when the statistics baseline was last set

    Published: 2014-08-18