Allied Telesis AT-S63 - Manual (Page 510)

Chapter 25: GARP VLAN Registration Protocol
510 Section VI: Virtual LANs
STP ID
Present if the GARP application is GVRP; identifies the spanning tree
instance associated with the GIP context.
Connected Ring
The ring of connected ports. Only ports presently in the spanning tree
Forwarding state are eligible for membership in the GIP connected
ring. If no ports exist in the GIP connected ring, “No ports are
connected” is displayed. If the GARP application has no ports, “No
ports have been assigned” is displayed.