Blind DHCP server
Ok I have a interesting setup using NETGEAR M4100-D12G and Mirror Interface ACL (nothing like you do for your switches) with a USG 40 doing server DHCP to a LAN on ZyWALL 110 WAN that the USG 40 is not directly on with the ZyWALL 110 as the virtual gateway for clients of a wireless AP setup.
Ok here's the thing it works right up until it try to renew the IP which fails because the USG 40 would like to ARP the client which it can't do. But oddly the client sends Discover you get a offer then request and ACK and off the client goes working. But between that time the connection is lost with packet loss till its up and running again.
Would it be possible to disable the ARP check on DHCP renew? I know that my ISP DHCP does not do ARP check on DHCP renew so I'm thinking its possible.
My current workaround is just have the lease set to infinite.