Displays BGP information such as the local autonomous system number (ASN), maximum number of routes supported, and BGP4 statistics.
Privileged EXEC mode
This example displays summary BGP information.
device# show ip bgp summary BGP4 Summary Router ID: 10.10.10.10 Local AS Number: 2040 Confederation Identifier: not configured Confederation Peers: Maximum Number of IP ECMP Paths Supported for Load Sharing: 1 Number of Neighbors Configured: 1040, UP: 4 Number of Routes Installed: 3079574, Uses 483493118 bytes Number of Routes Advertising to All Neighbors: 107925658 (17078048 entries), Uses 1297931648 bytes Number of Attribute Entries Installed: 1296243, Uses 230731254 bytes '+': Data in InQueue '>': Data in OutQueue '-': Clearing '*': Update Policy 'c': Group change 'p': Group change Pending 'r': Restarting 's': Stale '^': Up before Restart '<': EOR waiting '$': Learning-Phase (for Delayed Route Calculation) '#': RIB-in Phase Neighbor Address AS# State Time Rt:Accepted Filtered Sent ToSend 16.1.1.1 65200 ESTAB 2h26m 8s 10011 0 1 0 17.1.1.1 65200 ESTAB 2h26m 8s 10011 0 10010 0 18.1.1.1 65200 ESTAB 2h26m 7s 10011 0 10011 0 19.1.1.1 65200 ESTAB 2h26m 7s 10011 0 10011 0 20.1.1.1 65200 ESTAB 2h26m 7s 10011 0 10011 0 21.1.1.1 65200 ESTAB 2h26m 7s 10011 0 10011 0 22.1.1.1 65200 ESTAB 2h26m 2s 10011 0 10011 0 23.1.1.1 65200 ESTAB 2h26m 7s 10011 0 10011 0 …
The $ : Learning-Phase (for Delayed Route Calculation) notation denotes that the BGP peer with this notation is learning bulk route updates. More than one peer can be in Learning-Phase. BGP BEST-Path selection is delayed until all the peers complete Learning-Phase. A peer can be in Learning-Phase only if BGP delayed route calculation feature is enabled and in specific scenarios as described in the init-route-calc-delay command.
The # : RIB-IN Phase notation denotes that a peer is learning bulk route updates. When one or more peer is in RIB-IN phase, BGP provides high preference for learning incoming route-updates and less preference for advertising routes (to outbound peers). An incoming route-update can possibly cause a BGP BEST-path change and eventually recompute RIB-OUT for outbound peers. Slowing down RIB-OUT until all peers complete learning route updates will improve BGP performance. This feature is enabled by default and does not require additional configuration. Unlike BGP delayed route calculation, BGP BEST-Path selection is not delayed in this Phase.
This example displays summary information when automatic discovery of neighbors is enabled for BGP.
device# show ip bgp summary BGP4 Summary Router ID: 4.4.4.4 Local AS Number: 100 Confederation Identifier: not configured Confederation Peers: Maximum Number of IP ECMP Paths Supported for Load Sharing: 1 Number of Neighbors Configured: 1, UP: 1 Number of Routes Installed: 0 Number of Routes Advertising to All Neighbors: 0 (0 entries) Number of Attribute Entries Installed: 0 *Dynamically created based on a listen range command Dynamically created neighbors: 0/100(max) A – Auto discovered LLDP neighbors using LLDP Auto discovered LLDP neighbors: 1 Neighbor Address AS# State Time Rt:Accepted Filtered Sent ToSend A 56.1.1.2 100 ESTAB 0h20m 7s 0 0 0 0
This example displays summary information about dynamically created BGP neighbors.
device# show ip bgp summary BGP4 Summary Router ID: 10.1.1.1 Local AS Number: 100 Confederation Identifier: not configured Confederation Peers: Maximum Number of IP ECMP Paths Supported for Load Sharing: 1 Number of Neighbors Configured: 3, UP: 1 Number of Routes Installed: 7, Uses 840 bytes Number of Routes Advertising to All Neighbors: 6 (2 entries), Uses 120 bytes Number of Attribute Entries Installed: 4, Uses 460 bytes Neighbor Address AS# State Time Rt:Accepted Filtered Sent ToSend *10.1.2.1 100 CONN 1h51m27s 0 0 0 2 * Dynamically created based on a listen range command Dynamically created neighbors: 1/(200 max)