The value of tBgpPeerMd5AuthKey specifies the authentication key
to be used between BGP peers neighbors before establishing sessions.
Authentication is done using the MD-5 message based digest protocol.
Authentication can be configured globally and applied to all BGP peers
or per group or per peer. The most specific value is used.
The authentication key can be any combination of letters or numbers.
Note that the string may contain embedded nulls.