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Need help configuring my FWSM. Adding an interface?

cshannahan
Level 1
Level 1

So we have an FWSM in our 6509 chassis.  It has an inside interface and an outside interface to the internet.  I would like to add an interface to the FWSM to route to other parts of our network.  I have added the interface I want and have given it an IP, it can ping the other firewalls on the same network/vlan.  This interface is going to be the main link between other network segments.

The way the firewall is configured now, there's no VLANs on it, I believe that is all done on the supervior, etc.  I created the vlan99 on the 6500, I tried both giving it an IP and also just creating the vlan and the interface vlan but I can't get traffic to route from that switch to the firewall.

Basically I want the inside network to route everything to the inside interface, then the firewall will route out my new interface to other network segments.

I'm not sure what I'm missing but I need help with it, so if anyone has experience with the FWSM please chime in!  I believe the FWSM is configured correctly, but I think the issue might be with the switch getting the traffic to it, etc.

15 Replies 15

Ok progress.  Although I removed the interface vlan 99 info, the actual interface vlan 99 was still there on the MFSC, so I removed that, added some NAT statements and now I'm getting from inside the FWSM to inside the firewall on the other side so I think once I get all of the nat statements sorted out I should be working without issue.

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