router config is "flipped over"

[axfalk]

I have a very strange phenomenon, where after the last change about 1 month ago, the NAT lines of the config to a 2600 router are reversed, i.e. the first line has become the last line, etc. Has anybody seen anything like that?

Thanks.

_ Alex

[thisisshanky]

Not exactly understanding the scenario, but did you add any command, (related to nat) during that time, If you have an idea how it looked one month back, then please post both configuration outputs(the one before, and one that is now)

[axfalk]

Sorry for the ambiguity, but this is kind of hard to articulate.

Here the part of the config last month:

ip nat inside source static 172.21.56.8 199.178.8.8

ip nat inside source static 172.21.56.9 199.178.8.9

ip nat inside source static 172.21.56.10 199.178.8.10

ip nat inside source static 172.21.56.11 199.178.8.11

Here is what it looks like today:

ip nat inside source static 172.21.56.11 199.178.8.11

ip nat inside source static 172.21.56.10 199.178.8.10

ip nat inside source static 172.21.56.9 199.178.8.9

ip nat inside source static 172.21.56.8 199.178.8.8

So, as you see, the order is reversed, but not the content.

Thanks.

_ Alex

[forbesl]

Ensure you don't have your "ip nat inside" and "ip nat outside" statements reversed on your interfaces. "ip nat inside" should be on the interface connected to your private network, and "ip nat outside" should be on the interface connected to your public network (WAN or outside).

[axfalk]

Thanks for your response. This configuration has been in place for a while and no recent changes have been made.

_ Alex

[michel.mueller]

Did you do an IOS upgrade recently ?