02-20-2012 04:21 PM - edited 03-04-2019 03:21 PM
Hello all,
I have the following configs for NAT in a Cisco2650XM:
ip nat inside source route-map nonat interface Serial0/0 overload
route-map nonat permit 10
match ip address nonat
ip access-list extended nonat
permit 192.168.85.0 0.0.0.255 any
interface FastEthernet0/0
ip address 192.168.85.1 255.255.255.0
ip nat inside
int ser0/0
ip address 1.1.1.1 255.255.255.0
ip nat outside
When i do "ping 4.2.2.2 source fa0/0", it is not successful.
The same configs are applied on a Cisco IAD 2431 nd the pings are successful.
Any reason as to why this difference is there?
Thanks
Mukundh
02-20-2012 07:11 PM
hi mukundh,
have you configured a static default route on your 2650?
please post full config and topology map.
02-20-2012 07:23 PM
Hi John
I dont have access to the router now. But apart from the configs I stated, the only other important line I could think about is the static default route as follows:
ip route 0.0.0.0 0.0.0.0 1.1.1.2
There are no other static routes or dynamic routing involved.
Thanks
Mukundh
02-20-2012 07:29 PM
ok. is this a lab set up?
were you able to ping 1.1.1.2 from this router?
02-20-2012 07:34 PM
Yes, it is a lba setup
I was able to ping 1.1.1.2 when i just enter "ping 1.1.1.2" in global mode but when i enter " ping 1.1.1.2 source fa0/0" there is no success.
02-20-2012 07:44 PM
ok gotcha but i still need to see your full config and topology diagram.
make sure your 2650 FE0/0 is up/up.
also, kindly re-configure NAT and try again:
2650XM(config)#ip nat inside source list nonat interface serial 0/0 overload
02-20-2012 08:45 PM
This should help a bit. Good luck!
02-21-2012 04:03 PM
You need to apply the policy map to fastethernet interface
ip policy route-map nonat
Hope this helps
Eugen
02-21-2012 07:27 PM
Hi all,
There seems to be an IOS related bug. For some IOSes in 2650s natting for the ip address of fastethernet interface or LAN interface doesnot take place.
Thanks all for your help!!!!
Mkundh
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