Connectivity Guide

disabled, the port remains shut down indenitely. 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 conguration
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 specied 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 ush optimization
OS10 oers a MAC address clearing technique that optimizes the number of MAC ush 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 trac drops and ooding. To prevent
trac drops and ooding, you can use the MAC ush optimization feature.
This feature ne tunes the MAC ush-related parameters, such as the MAC ush threshold and the MAC ush 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 ush indication. The number of calls
that are sent is displayed as ush invocations in the show spanning-tree command.
Layer 2
325