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ASA 5520 8.2(2) DMZ DHCP server broken vista/win7/mac

Friday I upgraded my asa to software 8.2(2).  I found out monday that users running anything other than windows XP, can no longer obtain a DHCP address my ASA.  While trying to obtain a DHCP address a box pops up saying "There is an IP Address conflict" and it obtains a bad network address such as 169.254.4.X.  It should be pulling down a 172.16.32.X address.

I have a guest wireless network that belongs to the DMZ.  The asa acts as the dhcp server & dmz router/endpoint.

Has anyone else experienced this problem?

3 REPLIES
New Member

Re: ASA 5520 8.2(2) DMZ DHCP server broken vista/win7/mac

I'm not sure if this is part of the problem, but I found this in my log.

1Apr 29 201009:55:15106021169.254.4.101169.254.255.255Deny UDP reverse path check from 169.254.4.101 to 169.254.255.255 on interface DMZ

the 169.54.4.101 address is the bad address on my test machine when it cannot obtain a good DHCP address.

Cisco Employee

Re: ASA 5520 8.2(2) DMZ DHCP server broken vista/win7/mac

Can you double check if the DHCP server configuration is correctly configured? ie: all configuration still exists after the upgrade?

New Member

Re: ASA 5520 8.2(2) DMZ DHCP server broken vista/win7/mac

TAC was able to help me fix this.

We had to add this to my config:

sysopt noproxyarp dMZ

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