Connectivity Guide
disabled, the port remains shut down indenitely. 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 conguration
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 specied 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 oers 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 trac drops and ooding. To prevent
trac 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
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