Skip Links

How to configure MD5 authentication for BGP

By Brad Reese on Tue, 07/15/08 - 11:59pm.

Cisco How-To Tutorials

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

Contact Brad Reese

Search 51,599 current Cisco Job openings worldwide!

Brad's Top 5 Story Picks
# 1. Cisco vs. Nortel: Who's the customer support champ?
# 2. Cisco consummates agreement with legendary reseller CXtec
# 3. Cisco resume tips
# 4. Silver lining in Cisco stock decline: Tough times help Cisco gain market share
# 5. Cisco takes $78M haircut on VMware investment
Story Archives Brad Reese on Cisco Story Archives

Cisco VoIP Gateways

Cisco Power Supplies

Cisco Aironet Wireless

Cisco Refurbished Inventory Availability


On The Web