Allied Telesis AT-S101 - Manual (Page 146)

Chapter 13: Spanning Tree and Rapid Spanning Tree Protocols
146
The RSTP Configuration page allows you to configure RSTP as well
as to view the current settings. In the upper portion of the page, you
can set the following parameters:
Global RSTP Status
Set this field to enable to activate RSTP on the switch. The default is
disable.
Protocol Version
Set this field to enable to activate RSTP or STP on the switch. This
field is greyed out until you set the Global RSTP Status to enable. To
activate this field click Apply and then select RSTP or STP-
compatible. The default value is RSTP.
This section contains the following items in the middle portion of the
web page. You cannot change these fields.
Root Port
The active port on the switch that is communicating with the root
bridge. If the switch is the root bridge for the LAN, then there is no root
port and the root port parameter is set to 0.
Root Path Cost
The sum of all the root port costs of all the bridges between the
switch’s root port and the root bridge including the switch’s root port
cost.
Time Since Topology Change
The time in seconds since the last topology change took place. When
RSTP detects a change to the LAN’s topology or when the switch is
rebooted, this parameter is reset to 0 seconds and begins
incrementing until the next topology change is detected.
Topology Change Count
An integer that reflects the number of times RSTP has detected a
topology change on the LAN since the switch was initially powered on
or rebooted.
The following parameters refer to the designated root bridge. You
cannot change these fields.
Designated Root
This parameter includes two fields: the root bridge priority and the
MAC address of the root bridge. For example, 1000 00C08F1211BB
shows the root bridge priority as 1000, and 00C08F1211BB as the
MAC address.
Hello Time
The hello time. See “Hello Time and Bridge Protocol Data Units
(BPDU)” on page 138. This parameter affects only the root bridge.