configure stpd flush-method

configure stpd flush-method [vlan-and-port | port-only]


Configures the method used by STP to flush the FDB during a topology change.

Syntax Description

vlan-and-port Specifies a VLAN and port combination flush method.
port-only Specifies a port flush method.


The default flush method is vlan-and-port.

Usage Guidelines

For scaled up configurations where there are more than 1000 VLANs and more than 70 ports participating in STP, the number of messages exchanged between STP/FDB/HAL modules can consume a lot of system memory during an STP topology change using the default configuration for flush method. In such situations, setting the flush method to “port-only” can help reduce the system memory consumption.


The following command sets the flush method to port-only:

configure stpd flush-method port-only


This command was available in ExtremeXOS 12.4.5.

Platform Availability

This command is available on ExtremeSwitching X435, X440-G2, X450-G2, X460-G2, X465, X590, X620, and X695 series switches.