The following configuration guidelines must be followed to configure DHCP relay and snooping:
7210 SAS devices do not support the ARP populate based on the DHCP lease, assigned to the DHCP client
7210 SAS devices do 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.
On the 7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C, DHCP packets received over an SDP are identified and option-82 inserted by the node can be removed by the node, in the downstream direction. SAP or a SDP, as applicable. DHCP snooping configuration on an SDP is supported only on the7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C.