The value of tmnxL2tpTuStatusRxSrcAddr indicates the source IP
address found in L2TP control messages received for this
Layer Two Tunneling Protocol Tunnel.
The source address can be different from the value of the object
tmnxL2tpTuStatusAddr in case the value of the object
tmnxL2tpPeerAddrChangePlcy is equal to 'accept' or 'ignore'.