On the 7210 SAS-K 2F6C4T and 7210 SAS-K 3SFP+ 8C, the mechanisms discussed in this section are applicable when access ports or access-uplink ports are used as uplinks.
One application of hierarchical VPLS is to use 7210 SAS nodes with access ports or access-uplink ports as uplinks, which serve as Ethernet links to the closest PE node.
The following are several mechanisms to resolve a loop in an access network where 7210 SAS devices are used:
STP-based access, with or without mVPLS
Ethernet APS using G.8032
Non-STP-based access using mechanisms such as active/standby links and MC-LAG on the PE