The value of tmnxNatPcpSrvDsliteAftrAddr specifies the inside
Dual Stack Lite AFTR address.
Broadcast, multicast or martian IP addresses are not allowed.
Set the value of tmnxNatPcpSrvDsliteAftrAddr if PCP mappings
(forwarding entries) are requested for Dual Stack Lite subscribers.
The value all zeroes specifies that there is no inside
Dual Stack Lite AFTR address configured.