29.6.12 Checking the limit on the number of BGP4 + learned routes
- <Structure of this section>
(1) List of operation commands
The following tables list the operation commands for limiting the number of BGP4 + learned routes.
|
Command name |
Description |
|---|---|
|
show ipv6 route |
Displays routing information stored in the routing table. |
|
show ipv6 bgp |
Shows information about the BGP4+ protocol. |
|
clear ipv6 bgp |
Reconnects a peer that was disconnected because it exceeded the maximum number of BGP4+ routes that can be learned from a particular device. |
(2) Checking the limit on the number of BGP4 + learned routes and the number of routes learned from peers
To check the allowable maximum and the actual number of BGP4+ routes (sum of the active and inactive paths) learned from a particular peer, use the show ipv6 bgp operation command with the neighbors parameter and an <As>, a <Peer Address>, or a <Host name> argument or the detail parameter specified.
>show ipv6 bgp neighbors detail
Date 20XX/01/13 18:45:09
BGP4+ Peer: 3ffe:172:16:2::2, Remote AS: 65532
Remote Router ID: 172.16.2.200
BGP4+ Status:Idle HoldTime: 90 , Keepalive: 60
Established Transitions: 1 Established Date: 20XX/01/13 18:42:26..1
BGP4+ Version: 4 Type: External
Local Address: 3ffe:172:16:23::214
Local AS: 65531 Local Router ID: 172.16.2.100
Next Connect Retry: 00:32, Connect Retry Timer: 00:32
Last Keep Alive Sent: 18:42:20, Last Keep Alive Received: 18:42:20
BGP4+ Message UpdateIn UpdateOut TotalIn TotalOut
12 14 36 42
BGP4+ Peer Last Error: Cease(Over Prefix Limit) ..2
BGP4+ Routes Accepted MaximumPrefix RestartTime Threshold ..3
0 1000 60m 80%
BGP4+ Capability Negotiation: <IPv6-Uni>
Send : <IPv6-Uni>
Receive: <IPv6-Uni>
Password : Configured
BGP4+ Peer: 3ffe:192:168:2::1, Remote AS: 65531
Remote Router ID: 192.168.2.200
BGP4+ Status:Active HoldTime: 90 , Keepalive: 60
Established Transitions: 1 Established Date: 20XX/01/13 18:42:31
BGP4+ Version: 4 Type: Internal
Local Address: 3ffe:192:168:23::214
Local AS: 65531 Local Router ID: 192.168.2.100
Next Connect Retry: 00:32, Connect Retry Timer: 00:32
Last Keep Alive Sent: 18:44:31, Last Keep Alive Received: 18:44:31
BGP4+ Message UpdateIn UpdateOut TotalIn TotalOut
12 14 36 42
BGP4+ Routes Accepted MaximumPrefix RestartTime Threshold ..4
94 1000 none 75%
BGP4+ Capability Negotiation: <IPv6-Uni>
Send : <IPv6-Uni>
Receive: <IPv6-Uni>
Password : Configured |
-
The peer is disconnecting from 20XX/01/13 18:42:26.
-
The peer was disconnected because it exceeded the maximum number of learned routes.
-
The disconnected peer was reconnected after 60 minutes.
-
Of the allowable maximum of 1000 routes, the peer has learned 94 routes from the specified peer.
(3) Reconnecting BGP4+ sessions disconnected due to the limit on the number of learned routes
BGP4+ sessions that are disconnected because the number of learned routes exceeds the upper limit due to the limit on the number of learned routes are reconnected by specifying the * or <Peer Address>, <Host Name> parameter in the operation command clear ipv6 bgp.
Reconnection of a BGP4+ session by using the command
-
# clear ipv6 bgp 3ffe:172:16:2::2
Reconnects the BGP4+ session with remote peer address 3ffe:172:16:2::2, which was disconnected after exceeding the learned routes limit.