with the current configuration, all your traffic is translated to the address of the ATM 0.1 interface. You already have access list 100 defined, but I think you are missing a few lines. Try and add the following:
ip Nat inside source route-map nonat interface ATM0.1 overload
access-list 100 deny ip 192.168.155.0 0.0.0.255 192.168.156.0 0.0.0.255
access-list 100 permit ip 192.168.155.0 0.0.0.255 any
route-map nonat permit 10
match ip address 100
Can you try this and check if it makes a difference ?
We are pleased to announce availability of Beta software for 16.6.3. 16.6.3 will be the second rebuild on the 16.6 release train targeted towards Catalyst 9500/9400/9300/3850/3650 switching platforms. We are looking for early feedback from custome...