The value of tmnxMsdpPeerGroupMsgRcvRate specifies the number of
MSDP messages (including source active messages) that are read from
the TCP session per tmnxMsdpMsgRcvRateTime seconds
By default, no MSDP messages are read from the TCP session
and this is specified by the value 0.
Once the number of MSDP packets defined in tmnxMsdpMsgRcvRateThd
have been processed the rate of all other MSDP packets is rate
limited by no longer accepting messages from the TCP session until
tmnxMsdpMsgRcvRateTime seconds have elapsed.