04-06-2022 05:26 PM
So i have been deploying cisco FDM managed firewalls. I noticed an interesting bug with DHCP and 7.x code. If install a config via a backup, configure via API and upload a config, or deploy a template to a 7.x code using CDO to the firewall it botches DHCP. Clients will run through the entire scope and request every IP address. Its a constant DHCP Decline via wireshark. Has any else seen this? I can duplicate it and have. If i stick with 6.6 code it seems to work.
04-06-2022 11:34 PM
personally, i will not use FW as DHCP Server, but sometimes requirements may change.
Since this is new code, there may be bugs around worth looking at below release notes :
if this is a major issue worth contacting Cisco TAC.
04-14-2022 06:48 PM
It ended up being something with NAT. Without the destination interface specified in the nat it cause a major DHCP malfunction.
04-07-2022 05:39 PM
It gets better, if i put a static ip from the same subnet it tells me another device has that IP. Something is really messed up. I have one device plugged into the firewall port.
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