Reference Guide

350 | Border Gateway Protocol IPv4 (BGPv4)
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Command
History
neighbor password
c e s
Enable Message Digest 5 (MD5) authentication on the TCP connection between two neighbors.
Syntax
neighbor {ip-address | peer-group-name} password [encryption-type] password
To delete a password, use the no neighbor {ip-address | peer-group-name} password
command.
Parameters
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
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.
encryption-type (OPTIONAL) Enter 7 as the encryption type for the password entered. 7
means that the password is encrypted and hidden.
password Enter a text string up to 80 characters long. The first character of the password
must be a letter.
You cannot use spaces in the password.
Version 7.8.1.0 Introduced support on S-Series
Version 7.7.1.0 Introduced support on C-Series