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PIX Arp issue

I have setup a pair of PIX(failover). I have no problem ping across the firewall to remote subnet. But When i try to ping within the same subnet, it fails.

When I do show arp on one of the machine. The mac addresses of the machines in the local subnet is showing mac address on the PIX firewall interface.

When I do a no sysopt noproxyarp on the affected interface.

The problem goes away.

I am puzzled. Anyone has any ideas

1 REPLY
Cisco Employee

Re: PIX Arp issue

The PIX is proxyarping for your inside addresses because you might have "alias" command configured, its a known issue, below is the bug ID, remove the alias command and you'll see the problem is gone, PIX will no longer prozyarp for inside addresses.

CSCdt01825

HTH

R/Yusuf

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