Configures the method used by STP (Spanning Tree Protocol) to flush the FDB (forwarding database) during a topology change.
| vlan-and-port | Specifies a VLAN (Virtual LAN) and port combination flush method. |
| port-only | Specifies a port flush method. |
The default flush method is vlan-and-port.
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.
This command is available on the Summit X450-G2, X460-G2, X670-G2, X770, and ExtremeSwitching X440-G2, X620, X690, X870 series switches.
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