Administrator Guide

CONFIG-ROUTERBGP mode
neighbor ip-address peer-group peer-group-name
6. Add a neighbor as a remote AS.
CONFIG-ROUTERBGP mode
neighbor {ip-address | peer-group name} remote-as as-number
Formats: IP Address A.B.C.D
• Peer-Group Name: 16 characters.
• as-number: the range is from 0 to 65535 (2-Byte) or 1 to 4294967295 | 0.1 to 65535.65535 (4-Byte) or 0.1 to
65535.65535 (Dotted format)
To add an external BGP (EBGP) neighbor, congure the as-number parameter with a number dierent from the BGP as-
number congured in the router bgp as-number command.
To add an internal BGP (IBGP) neighbor, congure the as-number parameter with the same BGP as-number congured in the
router bgp as-number command.
Example of Viewing a Newly Created Peer Group
Example of Enabling a Peer Group
Example of the show ip bgp peer-group Command
After you create a peer group, you can use any of the commands beginning with the keyword neighbor to congure that peer
group.
When you add a peer to a peer group, it inherits all the peer group’s congured parameters.
A neighbor cannot become part of a peer group if it has any of the following commands congured:
• neighbor advertisement-interval
• neighbor distribute-list out
• neighbor filter-list out
• neighbor next-hop-self
• neighbor route-map out
• neighbor route-reflector-client
• neighbor send-community
A neighbor may keep its conguration after it was added to a peer group if the neighbor’s conguration is more specic than the
peer group’s and if the neighbor’s conguration does not aect outgoing updates.
NOTE: When you congure a new set of BGP policies for a peer group, always reset the peer group by entering the
clear ip bgp peer-group peer-group-name command in EXEC Privilege mode.
To view the conguration, use the show config command in CONFIGURATION ROUTER BGP mode. When you create a peer
group, it is disabled (shutdown). The following example shows the creation of a peer group (zanzibar) (in bold).
Dell(conf-router_bgp)#neighbor zanzibar peer-group
Dell(conf-router_bgp)#show conf
!
router bgp 45
bgp fast-external-fallover
bgp log-neighbor-changes
neighbor zanzibar peer-group
neighbor zanzibar shutdown
neighbor 10.1.1.1 remote-as 65535
neighbor 10.1.1.1 shutdown
170
Border Gateway Protocol IPv4 (BGPv4)