Hi All

I'm curious about something I am seeing with NAT.

I have the following NAT statement configured in IOS translating the entire
network

ip nat inside source static network 10.45.45.0 10.4.4.0 /24

Now when I perform the following ping from another host it is successful
and creates the the NAT translations shown further down

R6#ping 10.4.4.4
Type escape sequence to abort.
Sending 5, 100-byte ICMP Echos to 10.4.4.4, timeout is 2 seconds:
!!!!!
Success rate is 100 percent (5/5), round-trip min/avg/max = 40/57/68 ms

R4#show ip nat trans
Pro Inside global      Inside local       Outside local      Outside global
icmp 10.4.4.4:14       10.45.45.4:14      54.54.54.6:14      54.54.54.6:14
--- 10.4.4.4           10.45.45.4         ---                ---
--- 10.4.4.0           10.45.45.0         ---                ---

What I am curious about is what is the :14 referring to in the above
translation list. Considering it is ICMP I don't believe it is a port so
can anyone enlighten me?

Thanks
Ben
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