Allied Telesis AT-GS950/8 User Manual page 133

Global MSTP Status - Set this field to Enable or Disable the
MSTP feature on the switch. The Global MSTP Status must be set
to Enable before the other MSTP configuration parameters can be
set.
Note
Both RSTP and BPDU Passthrough must be disabled before you
enable MSTP.
Caution
Enabling or disabling MSTP causes the switch to temporarily stop
switching Ethernet network traffic.
Maximum MST Instances - This specifies the maximum number
of Multiple Spanning Tree Instances (MSTIs) that can be
configured. The range is 1 - 31.
Bridge Priority - This parameter specifies the priority used in
determining the regional root for a particular MSTI. For more
information about Bridge Priority, see Table 8 on page 338.
Region Name - This parameter specifies the region's name where
the bridge is a member. This name must be identical to the
regional names specified on other switches in the same MSTP
region. See "Multiple Spanning Tree Regions" on page 336 for
more information.
Region Revision - The parameter indicates the region's revision
and must be identical to the regional names specified on other
switches in the same MSTP region. See "Multiple Spanning Tree
Regions" on page 336 for more information.
Dynamic Path Cost Calculation - This parameter is either True or
False. When set to True, the path cost of each port on the bridge is
dynamically calculated based on the port speed. If the parameter is
set to False, the path cost of the bridge is based on the initial value
of the port speed.
In the middle section of the page, the status of the MSTP bridge

parameters are shown. The bottom section of the page is where
you can adjust the values of these parameters. The following fields
are listed:
Maximum Age - The Maximum Age defines the amount of time a
port will wait for STP/RSTP information. MSTP uses this parameter
when interacting with STP/RSTP domains on the boundary ports.
Its range is 6 - 40 seconds.
Forward Delay - The Forward Delay defines the time that the
AT-GS950/8 Web Interface User Guide
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