I have two buildings that are connected via a LightPoint HyBridge (1.25GB). This is essentially a long GB Ethernet connection between buildings. One network is 10.10.10.x /24 and the other is 192.168.1.x/24. I would like to remain on the same physical network so the networks can share resources, do backup routines, etc. We have demonstrated that the networks can co-exist with the exception of DHCP traffic. There are DHCP servers on either side of the network and that is a problem (one on a Sonicwall and one on a 2008 R2 server respectively). I would like to stop DHCP traffic from traversing the bridge (which the device is incapable of doing). I would like to do this in the least complicated manner as is possible. Adding an intermediary network, using VLANs or introducing DHCP snooping are all possibilities. However, I would like to simply block ports 67 and 68 at a single point in the network (preferably where the bridge is connected to either side of the network. Is there any way to do this? I want to make sure that all traffic continues to flow with the exception of these well known DHCP ports and I would prefer not to 'flatten' the network.