SteveCRMC,   Regarding that error, the circuit ID in a DHCP request is the VLAN number it is coming from, so that the DHCP server can assign a suitable IP address for the VLAN. If the switch complains there are probably DHCP requests from unknown VLANs or at least the switch does not have interfaces for these VLANs 45, 48, 53.   Let me know if this helps.      
I'm getting the following line entered just about every second in the log and not sure what could be causing it as this is a fairly standard config that we have in place and I haven't seen this anywhere else. Running 6.7.1.1 and it is a N2048P. Any ideas?   IP_HELPER[IpHelperTask]: relay_main.c(1632) 780 %% WARN Circuit ID option contains unknown interface 53/48/45
N2000 IP Helper log entry