Hello,
I'd like to present the following case to the community to see if any member has been facing a similar case.
Have a 5510 in Routed mode, simple Static NAT to interface two networks (inside_1 is my private space, and outside_1 the larger intranet that hosts heavy traffic). outside_2 faces internet via pppoe just for VPN purposes.
It was operating fine for one year then one port broke (outside_2, internet), leaving no vpn. We followed RMA service replacement and the new unit came with upgraded SW (8.0.4) than the one the original config was created on (8.0.2).
To ease the replacement, I did downgrade the sw boot image. Then I did restore the config by tftp to the startup-config and then a reload. Everything seems to load fine.
Problem is that testing reveals some sort of issue: I can ping some of the intranet hosts but can't reach gateway, thus larger segment of hosts become unreachable. It seems as if the NAT mechanism can't find the next gateway where to hop. For debug practice, I've enabled all the icmp stuff so ping wasn't being blocked by the device.
Being given the fact that this config was up and running prior to the replacement, I've no reason to suspect any mysconfigured items (ie routes, NAT, access-list), but obviously I'm obfuscated and can't see what else I'm missing.
How is that possible that the PING only reaches certain hosts? Pinging to 10.15.5.90 works (Route is 0.0.0.0 0.0.0.0 to 10.15.5.126 (gw)), but pinging to the gateway itself doesn't (10.15.5.126) and even worse, hosts like 10.15.167.210 do not respond either. Clueless.
I appreciate your time taken to read this. Hopefully you can help with your experience and shedding some light to figure t
