Users Guide

Supported Releases 10.2.0E or later
spanning-tree mst mac-ush-threshold
Congures the mac-ush threshold value for a specic instance.
Syntax
spanning-tree mst instance-number mac-flush-threshold threshold-value
Parameters
• instance-number—Enter the instance number, from 0 to 4094.
• threshold-value—Enter the threshold value for the number of ushes, from 0 to 65535. The default
value is 5.
Default Not congured
Command Mode CONFIGURATION
Usage Information This threshold indicates the number of port-based ush requests allowed to be invoked before starting the ush
optimization. When the ush interval value is non-zero, port-and-instance-based ushing is triggered until the
threshold is reached. Once the threshold is reached the MAC ush timer starts. On timer expiry, the system
triggers instance-based ushing. When the timer is running, all port-and-instance-based ushing is suppressed.
The no form of the command sets the ush indication threshold of the specic instance to its default value.
Example
OS10(config)# spanning-tree mst 10 mac-flush-threshold 255
Supported Releases 10.4.0E(R1) or later
spanning-tree mst max-age
Congures the time period the bridge maintains conguration information before refreshing the information by recomputing the MST
topology.
Syntax
max-age seconds
Parameters seconds — Enter a maximum age value in seconds, from 6 to 40.
Default 20 seconds
Command Mode CONFIGURATION
Usage Information The no version of this command resets the value to the default.
Example
OS10(config)# spanning-tree mst max-age 10
Supported Releases 10.2.0E or later
spanning-tree mst max-hops
Congures the maximum hop count for a BPDU to travel before it is discarded.
Syntax
spanning-tree mst max-hops number
Parameters number — Enter a maximum hop value, from 6 to 40.
Default 20
Command Mode CONFIGURATION
Usage Information A device receiving BPDUs waits until the max-hops value expires before discarding it. When a device receives the
BPDUs, it decrements the received value of the remaining hops and uses the resulting value as remaining-hops in
the BPDUs. If the remaining MSTP 1333 hops reach zero, the device discards the BPDU and ages out any
432 Layer 2