Allied Telesis AT-S79 - Manual (Page 166)

Chapter 13: Rapid Spanning Tree Protocol (RSTP)
166 Section I: Using the Menus Interface
Configuring the RSTP Bridge Settings
To configure the RSTP bridge settings, perform the following procedure:
1. From the Main Menu, type B to select Basic Switch Configuration.
The Basic Switch Configuration Menu is shown in Figure 4 on page 34.
2. From the Basic Switch Configuration Menu, type S to select Rapid
Spanning Tree Configuration.
The Rapid Spanning Tree Configuration Menu is shown in Figure 40
on page 163.
3. Type P to select Set Bridge Priority.
The following prompt is displayed:
Enter bridge priority>
The value is in the range from 0x0000 to 0xF000 and in
increments of 0x1000.
This indicates the priority number for the bridge, in hexadecimal
format. This number is used to determine the root bridge for RSTP.
The bridge with the lowest priority number is selected as the root
bridge. If two or more bridges have the same low priority value, that is,
the lowest of all the other bridges, then the bridge with the numerically
lowest MAC address becomes the root bridge. When a root bridge
goes offline, the bridge with the lowest priority number automatically
takes over as the root bridge. This parameter can be from 0X0000 to
0XF000, with 0XF000 being the highest priority.
The bridge priority is shown as the first field in the “Designated Root”
and “Bridge ID” parameters.
4. Enter a number for the bridge priority.
5. Type H to select Set Bridge Hello Time.
The following prompt is displayed:
Enter bridge hello time>
This is the time interval between generating and sending configuration
messages by the bridge. This parameter can be from 1 to 10 seconds.
The default is 2 seconds.
6. Enter a number for the bridge hello time.
7. Type M to select Set Bridge Maximum Age.