The following configuration guidelines are specific to the 7210 SAS-T operating in the network mode.
When ‟discard-unknown” is enabled on a B-VPLS, the following behavior can be observed:
Unknown unicast (B-DA) packets arriving on a B-SAP are dropped.
Unknown unicast (C-DA) packets arriving on a B-SAP are processed in the I-VPLS, if the B-DA is not unknown unicast.
Unknown unicast (C-DA) packets arriving on an I-SAP are not dropped and are flooded in the B-VPLS, because B-DA is equal to the ‟Group Mcast MAC” and is a known value
Port based SHG is available for use with both I-VPLS and B-VPLS service. Service based SHG is not available in both.