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ARP on Catalyst6500 doesn't update the MAC address of a PIX 515E

I have seen someone put this thread on other forum,but i can't settle the problem.follow is the question.The network has a Catalyst 6500 be a core switch and down link to a Catalyst 2950, and Catalyst 2950 down link to a PIX 515e firewall, as below...

C6500

|

|---(Public Network)

|

C2950

|

|---(Public Network)

|

PIX515e

|-----3 servers on DMZ

|

(Inside Protected Network)

I'm using Static NAT maps addresses of the several servers beside a DMZ port and using PAT for inside network. The problem is that when everything has ran for a few minutes then the servers on a dmz can not reach the public network, the public network can not reach the servers also. I have to clear the ARP cache on a C6500 to let it works again. This problem does not occur with the inside network that is using PAT translation.

1 REPLY
Cisco Employee

Re: ARP on Catalyst6500 doesn't update the MAC address of a PIX

Does the problem still occur when you ping with the "record" option? Does it work if you disable mls on the vlan? "no mls ip" under the vlan interface.

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