configure stpd ports restricted-tcn

configure stpd stpd_name ports restricted-tcn [on | off] port_list

Description

Restricts the propagation of Topology Change Notification (TCN) BPDUs on the specified port.

Syntax Description

stpd_name Specifies an STPD (Spanning Tree Domain) name on the switch.
on Does not propagate received TCN BPDUs and topology changes to other ports.
off Allows the propagation of received TCN BPDUs and topology changes to other ports.
port_list Specifies one or more ports or slots and ports.

Default

The default value is off.

Usage Guidelines

Set restricted-tcn to on to prevent unnecessary address flushing caused by persistent TCNs. Restricting TCNs is a useful when it is not possible to remove the source of the TCNs.

Example

The following example disables the propagation of TCNs in port 1:10 for STP (Spanning Tree Protocol) domain r1:

configure stpd r1 ports restricted-tcn on 1:10

History

This command was first available in ExtremeXOS 15.7.1.

Platform Availability

This command is available on the Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X440-G2, X620, X690, X870 series switches.