Cisco Cisco IOS Software Release 12.4(2)T

To configure MSDP MD5 password authentication, you must be familiar with the following concepts:

Developed in accordance with RFC 2385, the MSDP MD5 password authentication feature is used to 
verify each segment sent on the TCP connection between MSDP peers. The ip msdp password peer 
command is used to enable MD5 authentication for TCP connections between two MSDP peers. When 
MD5 authentication is enabled between two MSDP peers, each segment sent on the TCP connection 
between the peers is verified. MD5 authentication must be configured with the same password on both 
MSDP peers; otherwise, the connection between them will not be made. Configuring MD5 
authentication causes the Cisco IOS software to generate and verify the MD5 digest of every segment 
sent on the TCP connection. 

Protects MSDP against the threat of spoofed TCP segments being introduced into the TCP 
connection stream. 

Uses the industry-standard MD5 algorithm for improved reliability and security.

This section contains the following required configuration task:

This task explains how to configure MSDP MD5 password authentication.

configure terminal

ip msdp peer {peer-name | peer-address} [connect-source interface-type interface-number] 
[remote-as as-number] 

ip msdp [vrf name] password peer {peer-name | peer-address} [encryption-type] string