Allied Telesis AT-9000 Series - Manual (Page 152)

Chapter 13: Setting Switch Spanning Tree Protocols
152
Modifying Switch Spanning Tree Protocol Settings
To modify switch settings for Spanning Tree Protocol, do the following:
1. Hover the cursor over the Switching tab.
The Switching tab is displayed. See Figure 20 on page 59.
2. From the Switching tab drop-down menu, select Spanning Tree.
The Switch Spanning Tree Settings page is displayed. See Figure 54
on page 149.
3. Change the following settings as needed:
 Active Protocol— Specifies if the active spanning tree protocol is
STP or RSTP. The default setting is RSTP.
Note
If you try to select MSTP from the menu, a message will appear
indicating that MSTP can only be set via the Command Line
Interface and will not allow the selection. To set the protocol to
MSTP, and for more information on MSTP, see Section VI:
Spanning Tree Protocols in the AlliedWare Plus Management
Software Command Line Interface User’s Guide and refer to the
STP, RSTP and MSTP Protocols, and MSTP Commands chapters.
 Status— Specifies if the spanning tree protocol is enabled or
disabled on the switch.
 Current Priority— By default, the current priority is set to 32,768.
You cannot change this field.
 New Priority (0-15)— Assigns the switch a priority number. The
device that has the lowest priority number in the spanning tree
domain becomes the root bridge. If two or more devices have the
same priority value, the device with the numerically lowest MAC
address becomes the root bridge.
The range is 0 to 61,440, in increments of 4,096. The range is
divided into the sixteen increments listed in Table 1 on page 150.
You specify the increment that represents the desired bridge
priority value. The default value is 32,768 (increment 8).