Displays the reasons for placing a port in a non-forwarding state.
| stpd_name | Specifies an STPD (Spanning Tree Domain) name on the switch. |
| port_list | Specifies one or more ports or slots and ports. |
| non-forwarding-reasons | Displays only reasons for placing a port in a non-forwarding state. |
N/A
The following example displays the non-forwarding reasons on port 1:10 in STP (Spanning Tree Protocol) domain r1:
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show stpd r1 ports 1:10 non-forwarding-reason
Port Reason
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1:1 Placed in listening state because it is in dispute.
1:2 Not been placed in a non-forwarding state due to any exceptional condition.
1:3 Placed in listening or blocking state by the Loop Protect feature.
1:4 Placed in listening state by the Loop Protect feature, but this condition
may be normal because the link partner does not support Loop Protect.
1:5 Placed in blocking state because a loopback condition has been detected.
1:6 Unknown non-forwarding reason.
This command was first available in ExtremeXOS 15.7.1.
This command is available on the Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X440-G2, X620, X690, X870 series switches.