I have a Win 2008 R2 (and then upgraded to 2012 R2) DHCP server which was getting loads of BAD_ADDRESS filling up the scope in vlan1. All other scopes for other vlans were unaffected. Wireshark indicated a the dell mac address for the management of IOA which the switch showed on our PortChannel3 (two 10gbe fiber optic interfaces).
But in our IOA config we have a static IP set of 10.1.0.103/16. The DHCP server is at 10.1.1.1/16 and also offers ip's in other scopes (vlan2 10.2.1.1/16, vlan3 10.3.1.1/16, vlan4 10.4.1.1/16 and vlan5 10.5.1.1/16).
I had to put the Dell IOA mac address in the DHCP deny filter list and enable it so that it would not respond and plug up our address space full of BAD_ADDRESS.
Any idea why the IOA is doing dhcp requests even though we set it for a static IP?