Reference Guide

Usage Information Dell EMC recommends increasing the hello-time for large congurations — especially congurations with multiple
ports. The no version of this command resets the value to the default.
Example
OS10(config)# spanning-tree mst hello-time 5
Supported Releases 10.2.0E 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 (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 (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
information that it holds for the port. The command conguration applies to all common IST (CIST) in the MST
region.
Example
OS10(config)# spanning-tree mst max-hops 30
Supported Releases 10.2.0E or later
instance
Congures MST instances and one or multiple VLANs mapped to the MST instance.
Syntax
instance instance-number {vlan vlan-range}
Parameters
• instance — Enter an MST instance value (0 to 63).
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