Reference Guide

spanning-tree forward-time
This command sets the Bridge Forward Delay parameter to a new value for the common and internal
spanning tree. The forward-time value is in seconds within a range of 4 to 30, with the value being
greater than or equal to “(Bridge Max Age / 2) + 1”.
Default 15
Format spanning-tree forward-time 4-30
Mode Global Config
no spanning-tree forward-time
This command sets the Bridge Forward Delay parameter for the common and internal spanning tree to
the default value.
Format no spanning-tree forward-time
Mode Global Config
spanning-tree guard
This command selects whether loop guard or root guard is enabled on an interface or range of
interfaces. If neither is enabled, then the port operates in accordance with the multiple spanning tree
protocol.
Default
none
Format spanning-tree guard {none | root | loop}
Mode Interface Config
no spanning-tree guard
This command disables loop guard or root guard on the interface.
Format
no spanning-tree guard
Mode Interface Config
spanning-tree max-age
This command sets the Bridge Max Age parameter to a new value for the common and internal
spanning tree. The max-age value is in seconds within a range of 6 to 40, with the value being less than
or equal to 2 x (Bridge Forward Delay - 1).
Default
20
Format spanning-tree max-age 6-40
Mode Global Config
Switching Commands
ExtremeSwitching 200 Series: Command Reference Guide for version 01 .02.04.0007 291