Reference Guide
212 | 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. 
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 Laura 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
 neighbor 100.10.92.9 no shutdown
 neighbor 192.168.10.1 remote-as 65123
 neighbor 192.168.10.1 update-source Loopback 0
 neighbor 192.168.10.1 no shutdown
 neighbor 192.168.12.2 remote-as 65123
 neighbor 192.168.12.2 update-source Loopback 0
 neighbor 192.168.12.2 no shutdown
R2(conf-router_bgp)#
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.










