Allied Telesis AT-S63 - Manual (Page 546)

Chapter 23: Spanning Tree and Rapid Spanning Tree Protocols
546 Section V: Spanning Tree Protocols
When you select a value for maximum age, observe the following
rules:
MaxAge must be greater than (2 x (HelloTime + 1)).
MaxAge must be less than (2 x (ForwardingDelay - 1))
6 - Bridge Identifier
The bridge identifier of the switch. The identifier consists of the
switch’s bridge priority value and MAC address. The values are
separated by a slash (/). To change the switch’s priority value, use
option 2, Bridge Priority. The MAC address of the switch cannot be
changed.
7 - Root Bridge
The MAC address of the root bridge of the spanning tree domain. This
value cannot be changed and is only displayed when RSTP is
activated on the switch.
8 - Root Priority
The priority value on the root bridge of the spanning tree domain. This
parameter is only displayed when RSTP is enabled on the switch. To
change the priority value on the root bridge, you must start a
management session on the switch functioning as the root bridge and
change its bridge priority value.
9 - Root Path Cost
The cost of the path from the current switch to the root switch of the
spanning tree domain. If the current switch is the root switch, root path
cost will be “0”. This value cannot be changed and is only displayed
when RSTP is activated on the switch.
4. After making changes, type R until you return to the Main Menu. Then
type S to select Save Configuration Changes.
Configuring
RSTP Port
Settings
To adjust RSTP port parameters, perform the following procedure:
1. From the Main Menu, type 3 to select Spanning Tree Configuration.
The Spanning Tree Configuration menu is shown in Figure 177 on
page 535.
2. From the Spanning Tree Configuration menu, type 3 to select
Configure Active Protocol.
The RSTP menu is shown in Figure 178 on page 537.
3. From the Spanning Tree Configuration menu, type 3 to select STP
Configuration.
The STP menu is shown in Figure 178 on page 537.