CpdV2PvstpPlusDispType is a read-write setting on the Ethernet network-facing (NNI/trunk) port that selects how Per-VLAN Spanning Tree Plus (PVST+) control frames (MAC 01:00:0C:CC:CC:CC, Ethertype 0x10B) are disposed of when they reach this NE — typically processed locally, dropped, passed through untouched, or tunneled across the network via L2PT. Passing PVST+ BPDUs through is needed when two Cisco-based customer sites need their per-VLAN spanning trees to interoperate across this carrier facility. On the network-facing trunk port linking to the next carrier NE, an administrator would set this object to peer, drop, pass-through, or tunnel Per-VLAN Spanning Tree Plus (PVST+) frames depending on whether this facility should terminate, block, forward, or L2PT-encapsulate that traffic.