Allied Telesis AT-S63 - Manual (Page 297)

AT-S63 Management Software Web Browser User’s Guide
Section IV: Spanning Tree Protocols 297
Bridge Max Hops
MSTP regions use this parameter to discard BPDUs. The Max Hop
counter in a BPDU is decremented every time the BPDU crosses an
MSTP region boundary. After the counter reaches zero, the BPDU is
deleted.
Revision Level
The revision level of an MSTP region. This is an arbitrary number that
you assign to a region. The revision level must be the same on all
bridges in a region. Different regions can have the same revision level
without conflict. The range is 0 (zero) to 255.
5. Click Apply.
6. To permanently save your changes, select the Save Config option in
the Configuration menu.
Proceed to the next procedure to configure the CIST priority.
Configuring the
CIST Priority
To configure the CIST priority, perform the following procedure:
1. From the home page, select Configuration.
2. From the Configuration menu, select the Layer 2 option.
3. Select the Spanning Tree tab.
The Spanning Tree tab is shown in Figure 109 on page 272.
4. Click Configure.
The expanded MSTP Spanning Tree tab is shown in Figure 121 on
page 295.
5. In the Configure CIST Parameters section, set the CIST Priority, the
priority number for the bridge.
This number is used to determine the root bridge of the bridged
network. 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.
6. Click Apply.
7. To permanently save your changes, select the Save Config option in
the Configuration menu.