The value of tmnxMsdpPeerGroupMsgRcvRateThd specifies the
number of MSDP messages that can be processed before
tmnxMsdpPeerGroupMsgRcvRate is set. This is useful during system
startup and initialization.
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 tmnxMsdpPeerGroupMsgRcvRateThd
have been processed the rate of all other MSDP packets is rate
limited by no longer accepting messages from the TCP session until
tmnxMsdpPeerGroupMsgRcvRateTime seconds have elapsed.