1.
enable
2.
configure
terminal
3.
router
bgp
autonomous-system-number
4.
bgp
log-neighbor-changes
5.
bgp
soft-reconfig-backup
6.
neighbor
{ip-address |
peer-group-name}
remote-as
autonomous-system-number
7.
neighbor
{ip-address |
peer-group-name}
soft-reconfiguration [inbound]
8.
neighbor
{ip-address |
peer-group-name}
route-map
map-name
{in |
out}
9.
Repeat Steps
6 through 8 for every peer that is to be configured with inbound soft
reconfiguration.
10.
exit
11.
route-map
map-name
[permit
|
deny] [sequence-number]
12.
set
ip
next-hop
ip-address
13.
end
14.
show
ip
bgp
neighbors
[neighbor-address]
15.
show
ip
bgp
[network]
[network-mask]
Examples
The following
partial output from the
show
ip
bgp
neighbors command shows information about the TCP
and BGP connections to the BGP neighbor 192.168.2.1. This peer supports route
refresh.
BGP neighbor is 192.168.1.2, remote AS 40000, external link
Neighbor capabilities:
Route refresh: advertised and received(new)
The following
partial output from the
show
ip
bgp
neighbors command shows information about the TCP
and BGP connections to the BGP neighbor 192.168.3.2. This peer does not support
route refresh so the soft-reconfig inbound paths for BGP peer 192.168.3.2 will
be stored because there is no other way to update any inbound policy updates.
BGP neighbor is 192.168.3.2, remote AS 50000, external link
Neighbor capabilities:
Route refresh: advertised
The following
sample output from the
show
ip
bgp command shows the entry for the network
172.17.1.0. Both BGP peers are advertising 172.17.1.0/24, but only the
received-only path is stored for 192.168.3.2.
BGP routing table entry for 172.17.1.0/24, version 11
Paths: (3 available, best #3, table Default-IP-Routing-Table, RIB-failure(4))
Flag: 0x820
Advertised to update-groups:
1
50000
192.168.3.2 from 192.168.3.2 (172.17.1.0)
Origin incomplete, metric 0, localpref 200, valid, external
50000, (received-only)
192.168.3.2 from 192.168.3.2 (172.17.1.0)
Origin incomplete, metric 0, localpref 100, valid, external
40000
192.168.1.2 from 192.168.1.2 (172.16.1.0)
Origin incomplete, metric 0, localpref 200, valid, external, best