Reference Guide

208 | Border Gateway Protocol IPv4 (BGPv4)
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When you complete your migration, be sure to reconfigure your routers with the new information and
disable this feature.
Disable this feature, using the
no neighbor local-as command in CONFIGURATION ROUTER BGP
mode.
Figure 9-24. Local-as information shown
Command Syntax Command Mode Purpose
neighbor {IP address |
peer-group-name local-as as
number [no prepend]
CONFIG-ROUTER-
BGP
Allow external routes from this neighbor.
Format:
IP Address: A.B.C.D
Peer Group Name: 16 characters
AS-number: 0-65535 (2-Byte) or 1-4294967295
(4-Byte) or
0.1-65535.65535 (Dotted format)
No Prepend specifies that local AS values are not
prepended to announcements from the neighbor.
You must Configure Peer Groups before assigning it to an AS.
This feature is not supported on passive peer groups.
R2(conf-router_bgp)#show conf
!
router bgp 65123
bgp router-id 192.168.10.2
network 10.10.21.0/24
network 10.10.32.0/24
network 100.10.92.0/24
network 192.168.10.0/24
bgp four-octet-as-support
neighbor 10.10.21.1 remote-as 65123
neighbor 10.10.21.1 filter-list Name in
neighbor 10.10.21.1 no shutdown
neighbor 10.10.32.3 remote-as 65123
neighbor 10.10.32.3 no shutdown
neighbor 100.10.92.9 remote-as 65192
neighbor 100.10.92.9 local-as 6500
Local-AS Number 6500
Maintained During Migration
Actual AS Number