Enterasys Networks D-Series - Manual (Page 271)

show spantree nonforwardingreason
Enterasys D-Series CLI Reference 8-53
show spantree nonforwardingreason
Use this command to display the reason for placing a port in a non‐forwarding state due to an
exceptional condition.
Syntax
show spantree nonforwardingreason port-string [sid sid]
Parameters
Defaults
If no port‐string is specified, non‐forwarding reason is displayed for all ports.
If no SID is specified, SID 0 is assumed.
Mode
Switch command, read‐only.
Usage
Exceptional conditions causing a port to be placed in listening or blocking state include a Loop
Protect event, receipt of disputed BPDUs, and loopback detection.
Example
This example shows how to display the non‐forwarding reason on fe.1.1:
D2(rw)->show spantree nonforwardingreason port fe .1.1
The non-forwarding reason for port fe .1.1 on SID 0 is None
port‐string Specifies port(s) for which to display the non‐forwarding reason.
sid sid (Optional) Specifies the specific Spanning Tree(s) for which to display
the non‐forwarding reason. Valid values are 0 ‐ 4094. If not specified,
SID 0 is assumed.