show stpd ports non-forwarding-reason

show stpd stpd_name ports {port_list} { non-forwarding-reasons }

Description

Displays the reasons for placing a port in a non-forwarding state.

Syntax Description


`stpd_name`	Specifies an STPD 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.

Default

N/A

Usage Guidelines

Ports can be placed in the non-forwarding state for the following reasons:

Placed in listening state because it is in dispute.
Not been placed in a non-forwarding state due to any exceptional condition.
Placed in listening or blocking state by the Loop Protect feature.
Placed in listening state by the Loop Protect feature, but this condition may be normal because the link partner does not support Loop Protect.
Placed in blocking state because a loopback condition has been detected.
Unknown non-forwarding reason.

Example

The following example displays the non-forwarding reasons on port 1:10 in STP domain r1:

show stpd r1 ports 1:10 non-forwarding-reason


Port        Reason
----------------------------------------------------------------------------------------                                                   
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.

History

This command was first available in ExtremeXOS 15.7.1.

Platform Availability

This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, X670-G2, X690, X695, X870, 5320, 5420, and 5520 series switches.