How to configure MD5 authentication for BGP

Border Gateway Protocol (BGP) supports authentication mechanism using the Message Digest 5 (MD5) algorithm.

When authentication is enabled, any Transmission Control Protocol (TCP) segment belonging to BGP exchanged between the peers is verified and accepted only if authentication is successful.

For authentication to be successful, both the peers must be configured with the same password.

If authentication fails, the BGP neighbor relationship is not being established.

To enable MD5 authentication for BGP, issue the neighbor {ip-address | peer-group-name} password string command under the BGP router configuration mode.

For more information about BGP authentication with an example refer to:

Configuring BGP

View more Cisco How-To Tutorials

http://www.BradReese.Com

Search 51,599 current Cisco Job openings worldwide!

	Cisco vs. Nortel: Who's the customer support champ?
	Cisco consummates agreement with legendary reseller CXtec
	Cisco resume tips
	Silver lining in Cisco stock decline: Tough times help Cisco gain market share
	Cisco takes $78M haircut on VMware investment
	Brad Reese on Cisco Story Archives

• Cisco
• LANs / WANs
• BGP authentication
• Configuring BGP
• MD5 authentication for BGP
• Message Digest 5 (MD5) algorithm
• neighbor {ip-address | peer-group-name} password string command
• Transmission Control Protocol (TCP)