Dell PowerSwitch S4128F-ON OS10 Enterprise Edition User Guide Release 10.4.3.0 - Page 325

disabled, the port remains shut down indefinitely. You must manually bring up the port using the shutdown and no shutdown commands. The no version of the command disables the recovery option. errdisable recovery cause bpduguard Example configuration OS10(config)# errdisable detect cause bpduguard OS10(config)# errdisable recovery interval 45 OS10(config)# errdisable recovery cause bpduguard View detect and recovery details OS10# show errdisable detect Error-Disable Cause Detect Status bpduguard Enabled OS10# show errdisable recovery Error-Disable Recovery Timer Interval: 300 seconds Error-Disable Reason Recovery Status bpduguard Enabled Recovery Time left Interface Errdisable Cause (seconds) ethernet 1/1/1:1 bpduguard 273 ethernet 1/1/2 bpduguard 4 port-channel 12 bpduguard 45 Setting spanning-tree link type for rapid state transitions As specified in IEEE 802.1w, OS10 assumes a port that runs in full duplex mode as a point-to-point link. A point-to-point link transitions to forwarding state faster. By default, OS10 derives the link type of a port from the duplex mode. You can override the duplex mode using the spanning-tree link-type command. As half-duplex mode is considered as a shared link, the fast transition feature is not applicable for shared links. If you designate a port as a shared link, you cannot use the fast transition feature, regardless of the duplex setting. 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. If the number of calls sent to the hardware is too high, it impacts system performance and causes traffic drops and flooding. To prevent traffic drops and flooding, you can use the MAC flush optimization feature. This feature fine tunes the MAC flush-related parameters, such as the MAC flush threshold and the MAC flush timer to reduce the number of calls sent to the hardware. The clear request sent to clear the MAC address table entry is called a flush indication. The number of calls that are sent is displayed as flush invocations in the show spanning-tree command. Layer 2 325