Enterasys N Standalone (NSA) Series Configuration Manual page 441

Table 6-2 Port-Specific show spantree stats Output Details
Output Field
Role
Cost
Priority
What it Displays ...
The Spanning Tree role of the port. The port role is assigned by the
Spanning Tree protocol and determines the behavior of the port — either
sending or receiving BPDUs, and forwarding or blocking data traffic.
The port cost.
The priority of the link in a Spanning Tree bridge. This value can be set
with the set spantree portpri
Spanning Tree Configuration Command Set
Configuring Spanning Tree Bridge Parameters
command (Section 6.2.2.11).
Matrix NSA Series Configuration Guide 6-13