Allied Telesis AT-S63 - Manual (Page 187)

AT-S63 Management Software Web Browser Interface User’s Guide
Section II: Advanced Features 187
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 the change, return to the General tab on the
System page and click Save Changes.
For more information about what the Save Changes button does,
refer to ”Saving Your Parameter Changes” on page 36.
Or, 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.
The Configuration System page is displayed with the General tab
selected by default, as shown in Figure 5 on page 40.
2. From the Configuration menu, select the Layer 2 option.
The Layer 2 page is displayed with the MAC Address tab selected
by default, as shown in Figure 23 on page 90.
3. Select the Spanning Tree tab.
The Spanning Tree tab is shown in Figure 51 on page 164.
4. Click Configure.
The expanded MSTP Spanning Tree tab is shown in Figure 62 on
page 185.
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.