Allied Telesis AT-S63 - Manual (Page 450)

Chapter 22: Multiple Spanning Tree Protocol
450 Section V: Spanning Tree Protocols
Path Cost
Specifies the path cost from the bridge to the regional root. If the
bridge is the regional root, the value is 0.
Associated VLANs
Specifies the VIDs of the VLANs that have been associated with the
MSTI ID.
The table does not include the CIST. The table is empty if no MSTI IDs
have been created.