Manual

Chapter 19: Multiple Spanning Tree Protocol
Section IV: Spanning Tree Protocols 372
Configuring the CIST Priority
This procedure explains how to adjust the bridge’s CIST priority.
Note
You cannot configure MSTP parameters until you have selected the
protocol as the active spanning tree protocol on the switch. For
instructions, refer to Enabling or Disabling a Spanning Tree Protocol
on page 340.
This procedure starts from the MSTP Menu. If you do not know how to
access the menu, perform steps 1 and 2 in Configuring MSTP Bridge
Settings on page 369.
To change the CIST priority, do the following:
1. From the MSTP Menu, type to select C to select CIST Menu.
The CIST Menu is shown in Figure 117.
Figure 117 CIST Menu
The CIST Priority field in the menu displays the current value for
this MSTP parameter. This number is used in determining the root
bridge of the network spanning tree. This number is analogous to
the RSTP bridge priority value. The bridge in the network with the
lowest priority number is selected as the root bridge. If two or
more bridges have the same bridge or CIST priority values, the
bridge with the numerically lowest MAC address becomes the
root bridge.
The Associated VLANs field displays the VIDs of the VLANs that are
currently associated with CIST and have not been assigned to a
MSTI.
Allied Telesyn Ethernet Switch AT-8524M - AT-S62
Production Switch
User: Manager 11:20:02 02-Jan-2004
CIST Menu
CIST Priority ............. 32768
Associated VLANs .......... 1,2,4,11
1 - Modify CIST Priority
R - Return to Previous Menu
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