Looks like it is just a sequence number of sort. I initiated a few pings and the numbers incremented for every attempt from that source. I am guessing that is how the IOS keep tracks and times out the translations for ICMP.
icmp 136.1.23.2:1 136.1.122.12:1 136.1.23.3:1 136.1.23.3:1 icmp 136.1.23.2:2 136.1.122.12:2 136.1.23.3:2 136.1.23.3:2 icmp 136.1.23.2:26 150.1.1.1:26 136.1.23.3:26 136.1.23.3:26 icmp 136.1.23.2:27 150.1.1.1:27 136.1.23.3:27 136.1.23.3:27 icmp 136.1.23.2:28 150.1.1.1:28 136.1.23.3:28 136.1.23.3:28 -Srikant On Sun, Sep 16, 2012 at 11:31 AM, Ben Shaw <[email protected]> wrote: > 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 > > _______________________________________________ > For more information regarding industry leading CCIE Lab training, please > visit www.ipexpert.com > > Are you a CCNP or CCIE and looking for a job? Check out > www.PlatinumPlacement.com >
_______________________________________________ For more information regarding industry leading CCIE Lab training, please visit www.ipexpert.com Are you a CCNP or CCIE and looking for a job? Check out www.PlatinumPlacement.com
