Reference Guide

Border Gateway Protocol IPv4 (BGPv4) | 335
Defaults
Not configured.
Command Modes
ROUTER BGP
Usage
Information
Configure the same password on both BGP peers or a connection does not occur. When you
configure MD5 authentication between two BGP peers, each segment of the TCP connection
between them is verified and the MD5 digest is checked on every segment sent on the TCP
connection.
Configuring a password for a neighbor will cause an existing session to be torn down and a
new one established.
If you specify a BGP peer group by using the
peer-group-name parameter, all the members of
the peer group will inherit the characteristic configured with this command.
If you configure a password on one neighbor, but you have not configured a password for the
neighboring router, the following message appears on the console while the routers attempt to
establish a BGP session between them:
%RPM0-P:RP1 %KERN-6-INT: No BGP MD5 from [peer's IP address]
:179 to [local router's IP address]:65524
Also, if you configure different passwords on the two routers, the following message appears
on the console:
%RPM0-P:RP1 %KERN-6-INT: BGP MD5 password mismatch from
[peer's IP address] : 11502 to [local router's IP address] :179
Command
History
neighbor peer-group (assigning peers)
c e s
Enables you to assign one peer to a existing peer group.
Syntax
neighbor ip-address peer-group peer-group-name
To delete a peer from a peer group, use the no neighbor ip-address peer-group peer-group-name
command.
Parameters
Defaults
Not configured.
Command Modes
ROUTER BGP
Version 8.3.7.0 Introduced on the S4810.
Version 7.8.1.0 Introduced support on S-Series
Version 7.7.1.0 Introduced support on C-Series
ip-address Enter the IP address of the router to be included in the peer group.
peer-group-name
Enter the name of a configured peer group.