The value of tmnxMsdpPeerAuthKey specifies the authentication
key to be used for a specific MSDP peering session. Authentication
is done using the MD-5 message based digest protocol. Authentication
cannot be configured globally and can be applied per peer only.
The authentication key can be any combination of letters or numbers.
Note that the string may contain embedded nulls.
By default, all MSDP messages are accepted and the MD5 signature
option authentication key is disabled