Connectivity Guide

Default Auto
Command Mode INTERFACE
Usage Information
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.
Example
OS10(config)# spanning-tree link-type point-to-point
Supported Releases
OS10 legacy command.
spanning-tree mac-ush-timer
Enables or disables MAC ush optimization.
Syntax
spanning-tree mac-flush-timer timer-interval
Parameters timer-interval—Enter the timer interval in centi-seconds, from 0 to 500. The default value is 200 centi-
seconds.
Default Enabled
Command Mode CONFIGURATION
Usage Information This command congures the ush interval time in centi-seconds, and controls the number of calls invoked from
the spanning-tree module. If the timer is set to 0, port-and-VLAN-based ushing occurs. If the timer is set to a
non-zero value, VLAN-based ushing occurs based on the MAC ush threshold value. The no version of this
command resets the ush-interval timer to its default value.
Example
OS10(config)# spanning-tree mac-flush-timer 500
OS10(config)# no spanning-tree mac-flush-timer
Supported Releases 10.4.3.0 or later
spanning-tree mode
Enables an STP type: RSTP, Rapid-PVST+, or MST.
Syntax
spanning-tree mode {rstp | mst | rapid-pvst}
Parameters
• rstp — Sets STP mode to RSTP.
• mst — Sets STP mode to MST.
• rapid-pvst — Sets STP mode to RPVST+.
Default RPVST+
Command Mode CONFIGURATION
Usage Information All STP instances stop in the previous STP mode, and restart in the new mode. You can also change to RSTP/MST
mode.
348 Layer 2