The value of tmnxMsdpPeerGrpPeerAuthKey specifies the
authentication key to be used for a specific MSDP peer group 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