[c-nsp] Tunnel keepalive in NAT environment problem

[Darren Yang]

Hi All,

Because Cisco GRE tunnel keepalive mechanism that must have public IP
on both site.
But I have one Router in NAT environment  that it's ip address is
private IP address and another outside Router is public IP address, so
when I configure "keepalive" on tunnel interface, the tuneel interface
would show "line protocol down" message directly....

If anyone have idea about this ?

Thanks :)

pigsign