This holds the name of the VSI (up to 31 characters) that a specific interface's service instance is being cross-connected to, as an entry in the hh3cVsiXconnectTable. An admin sets this when binding an interface's Ethernet service instance to a VSI, since it's this name that ties the access-side connection (indexed by interface and service instance ID) to the correct VPLS instance defined in hh3cVsiTable. For example, an admin binding interface GigabitEthernet1/0/1's service instance 10 to the "VPLS-CustomerA" VSI would set this object to "VPLS-CustomerA" in the corresponding xconnect table row.