Cisco ASR 9000 Series Configuration Manual page 52

BGP Configuration
RP/0/RSP0/CPU0:router(config-bgp)# neighbor-group AS_1
RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# advertisement-interval 15
RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# exit
RP/0/RSP0/CPU0:router(config-bgp)# neighbor 192.168.1.1
RP/0/RSP0/CPU0:router(config-bgp-nbr)# remote-as 1
RP/0/RSP0/CPU0:router(config-bgp-nbr)# use neighbor-group AS_1
The following output from the show bgp neighbors command shows that the advertisement interval used
is 15 seconds:
RP/0/RSP0/CPU0:router# show bgp neighbors 192.168.1.1
BGP neighbor is 192.168.2.2, remote AS 1, local AS 140, external link
Remote router ID 0.0.0.0
For Address Family: IPv4 Unicast
To illustrate the same rule, the following example shows how to set the advertisement interval to 15 (from
the session group) and 25 (from the neighbor group). The advertisement interval set in the session group
overrides the one set in the neighbor group. The inbound policy is set to POLICY_1 from the neighbor
group.
RP/0/RSP0/CPU0:routerconfig)# router bgp 140
RP/0/RSP0/CPU0:router(config-bgp)# session-group ADV
RP/0/RSP0/CPU0:router(config-bgp-sngrp)# advertisement-interval 15
RP/0/RSP0/CPU0:router(config-bgp-sngrp)# exit
RP/0/RSP0/CPU0:router(config-bgp)# neighbor-group ADV_2
RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# advertisement-interval 25
RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# address-family ipv4 unicast
RP/0/RSP0/CPU0:router(config-bgp-nbrgrp-af)# route-policy POLICY_1 in
RP/0/RSP0/CPU0:router(config-bgp-nbrgrp-af)# exit
RP/0/RSP0/CPU0:router(config-bgp-nbrgrp)# exit
RP/0/RSP0/CPU0:router(config-bgp)# exit
RP/0/RSP0/CPU0:router(config-bgp)# neighbor 192.168.2.2
RP/0/RSP0/CPU0:router(config-bgp-nbr)# remote-as 1
RP/0/RSP0/CPU0:router(config-bgp-nbr)# use session-group ADV
RP/0/RSP0/CPU0:router(config-bgp-nbr)# use neighbor-group ADV_2
The following output from the show bgp neighbors command shows that the advertisement interval used
is 15 seconds:
RP/0/RSP0/CPU0:router# show bgp neighbors 192.168.2.2
BGP neighbor is 192.168.2.2, remote AS 1, local AS 140, external link
Remote router ID 0.0.0.0
Cisco ASR 9000 Series Aggregation Services Router Routing Configuration Guide, Release 5.1.x
24
BGP state = Idle
Last read 00:00:00, hold time is 180, keepalive interval is 60 seconds
Received 0 messages, 0 notifications, 0 in queue
Sent 0 messages, 0 notifications, 0 in queue
Minimum time between advertisement runs is 15 seconds
BGP neighbor version 0
Update group: 0.1
eBGP neighbor with no outbound policy; defaults to 'drop'
Route refresh request: received 0, sent 0
Inbound path policy configured
Policy for incoming advertisements is POLICY_1
0 accepted prefixes
Prefix advertised 0, suppressed 0, withdrawn 0, maximum limit 524288
Threshold for warning message 75%
Connections established 0; dropped 0
Last reset 00:01:14, due to BGP neighbor initialized
External BGP neighbor not directly connected.
BGP state = Idle
Last read 00:00:00, hold time is 180, keepalive interval is 60 seconds
Received 0 messages, 0 notifications, 0 in queue
Sent 0 messages, 0 notifications, 0 in queue
Implementing BGP
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