Recently clients that have been away from the office for extended amount of time are not able to get a dhcp address when returning. More specifically they get it for a second, then lose it and gets marked as BAD ADDRESS in DHCP server. The client reverts to a 169.x.x.x ip address.
After deleting the BAD ADDRESSES and restarting dhcp server service it will usually then give out the same ip addresses that were marked BAD but work this time and stick.
We recently upgraded the local firewall to the global corporate standard with checkpoint (not sure if related). I checked for rogue dhcp server but didn't find anything. Really strange, anyone have any ideas?
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