I have made a configuration change in the core switch to allow DHCP requests to be forwarded between subnets; this is to allow us to use a single pair of DHCP servers for all of the CDS subnets.  Since we have been using (abusing?) the same configuration method to forward AWGTP discovery broadcasts to the Front End network, an ACL has been added to the OPS VLAN interface to filter out DHCP client requests from being forwarded to the FE network.  Server replies are not filtered as these need to propagate to the networks that request them.