Supermicro SSE-F3548S/SSE-F3548SR Configuration User’s Guide
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spanning-tree mst max-hops <maxhops-value>
value.
maxhops-value – MSTP max hops value
may be from 6 to 40 seconds.
The default max hops is 20.
Step 3 end
Exits the configuration mode.
Step 4 show spanning-tree mst
Displays the spanning tree max hops
along with other MST information.
Step 5 write startup-config
Optional step – saves this spanning tree
configuration to be part of startup
configuration.
The “no spanning-tree mst max-hops” command resets the MST max hops to the default
value of 20.
The example below shows how to configure the MSTP max hops.
Configure the MST max hops as 30.
SMIS# configure terminal
SMIS(config)# spanning-tree mst max-hops 30
SMIS(config)# end
6.16
Path Cost Long/Short
Spanning tree was originally designed with 16-bit path costs. This was good enough for fast Ethernet and
Gigabit Ethernet speed links, but not for 10Gb and higher speed ports. Hence, spanning tree protocol
introduced support for 32-bit path costs.
The 16-bit path costs method is referred to as the short path cost method and the 32-bit path cost
method is referred to as the long path costs method.
In MSTP and RSTP modes, Supermicro switches support long path costs by default. In STP compatible
RSTP mode, Supermicro switches uses short path costs by default.
Follow the steps below to change the path costs method.
Step Command
Description
Step 1 configure terminal
Enters the configuration mode
Step 2 To configure the path cost method as short
spanning-tree pathcost methodshort
To configure the path cost method as long
Configures the path cost method.
In MSTP and RSTP, the default path cost
method is long. In STP compatible RSTP
mode, the default path cost is short.