Quick Reference Guide

Spanning Tree | 155
After lowering the priority of MST 5:
Changing Spanning Tree Global Parameters
SFTOS has the following STP global operational parameters that you can change from their defaults.
Command Syntax Command Mode Purpose
[no] spanning-tree forward-time 4-30 Global Config Set the Bridge Forward Delay forward-time value for
the common and internal spanning tree, with the value
being greater than or equal to "(Bridge Max Age / 2)
+ 1".
Range: 4 to 30 seconds
Default: 15 seconds
spanning-tree hello-time 1-10
Global Config Set the Admin Hello Time for the common and
internal spanning tree, with the value being less than
or equal to "(Bridge Max Age / 2) - 1".
Range: 1 to 10 seconds
Default: 2 seconds
spanning-tree max-age 6-40
Global Config Set the Bridge Max Age for the common and internal
spanning tree, with the value being less than or equal
to "2 times (Bridge Forward Delay - 1)".
Range: 6 to 40 seconds
Default: 20 seconds
spanning-tree max-hops 1-127
Global Config Set the MSTP Max Hops value for the common and
internal spanning tree.
Range: 1 to 127
Default: 20
Force10 #show spanning-tree mst port summary 5 all
STP STP Port
Interface Mode Type State Role
--------- -------- ------- ----------------- ----------
1/0/1 Enabled Disabled Disabled
1/0/2 Enabled Disabled Disabled
1/0/3 Enabled Disabled Disabled
1/0/4 Enabled Disabled Disabled
1/0/5 Enabled Disabled Disabled
1/0/6 Enabled Disabled Disabled
1/0/7 Enabled Disabled Disabled
1/0/8 Enabled Disabled Disabled
1/0/9 Enabled Disabled Disabled
1/0/10 Enabled Discarding Backup
1/0/11 Enabled Forwarding Designated
1/0/12 Enabled Disabled Disabled
1/0/13 Enabled Disabled Disabled
1/0/14 Enabled Disabled Disabled
1/0/15 Enabled Disabled Disabled
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