Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.3.0 - Page 360

To fasten the spanning-tree state transitions, you can set the link type to point-to-point. To set the link type to point-to-point: • Use the following command in INTERFACE mode. spanning-tree link-type point-to-point MAC flush optimization OS10 offers a MAC address clearing technique that optimizes the number of MAC flush calls sent by the Spanning Tree Protocol (STP) module. For more information about this feature, see MAC flush optimization. RSTP allows per port-based flush until the number of calls sent is equal to the MAC flush threshold value that you have configured. When the number of calls that are sent reaches the configured threshold, RSTP ignores further per-port based flush and starts the MAC flush timer. When the timer expires, RSTP invokes an entire table flush, where it requests one flush for all the ports. RSTP is single instance and hence MAC flush optimization is not required. However, to enable this feature, configure the MAC flush timer to a non-zero value. This configuration is applied globally and applies for RSTP, MSTP, and RPVST. This configuration is retained when you change the STP mode. For RSTP, the threshold is set to a higher value (65,535) because RSTP does not require this optimization. Even when this feature is enabled, the global flush is invoked only after the flush count reaches 65,535. RSTP commands clear spanning-tree counters Clears the counters for STP. Syntax Parameters clear spanning-tree counters [interface {ethernet node/slot/port[:subport] | port-channel number}}] • interface - Enter the interface type: - ethernet node/slot/port[:subport] - Deletes the spanning-tree counters from a physical port. - port-channel number - Deletes the spanning-tree counters for a port-channel interface, from 1 to 128. Default Command Mode Usage Information Example Not configured EXEC Clear all STP counters on the device per the Ethernet interface or port-channel. OS10# clear spanning-tree counters interface port-channel 10 Supported Releases 10.2.0E or later 360 Layer 2