The following configuration guidelines must be followed to configure DHCP relay and snooping:
7210 SAS devices does not support the ARP populate based on the DHCP lease, assigned to the DHCP client
7210 SAS devices does not maintain the DHCP lease assigned to the client
7210 SAS devices do not perform IP spoofing checks and MAC spoofing checks based on the DHCP parameters assigned to the client
MAC learning must be enabled in the VPLS service, for DHCP snooping.
DHCP snooping is not supported for B-SAPs in B-VPLS services and I-SAPs in I-VPLS services.
Ingress ACLs cannot be used to drop DHCP control packet.
DHCP packets received over a SDP cannot be identified and option-82 inserted by the node cannot be removed by the node, in the downstream direction. If this behavior is not needed user should not enable DHCP snooping in the VPLS service, if the DHCP server is reachable over the SDP (either spoke-sdp or mesh-sdp).