Connectivity Guide

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.
You can enable the MAC flush optimization feature by setting the MAC flush timer to a non-zero value. This feature is enabled
by default with a default timer value of 200 centi-seconds.
To disable MAC flush optimization, configure the MAC flush timer value to 0.
When you configure the MAC flush timer to a non-zero value and the threshold to zero, the system invokes instance-based
flush once and starts the timer. When the timer expires, the system invokes an instance-based flush again.
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