Allied Telesis AT-S29 - Manual (Page 89)

AT-S29 Management Software User’s Guide
89
STA (Spanning Tree Algorithm)
The Spanning Tree Algorithm can be used to detect and disable network
loops, and to provide backup links between switches, bridges or routers.
This allows the switch to interact with other bridging devices (that is,
STA compliant switch, bridge or router) in your network to ensure that
only one route exists between any two stations on the network. For a
more detailed description of how to use this algorithm, refer to Chapter
4.
Spanning Tree
Information
The Spanning Tree Information screen displays a summary of the STA
information for the overall bridge or for a specific port or module. To
make any changes to the parameters for the Spanning Tree, use the
Spanning Tree Configuration menu. Also note that this screen cannot be
accessed unless you have already enabled the Spanning Tree Algorithm
via the Spanning Tree Configuration menu.
Spanning Tree
The parameters shown in the following figure and table describe the
current bridge STA Information.
Spanning Tree State
32768.003084119A3B Bridge ID
Max Age
Enabled
20 Seconds
Designated Root
Root Path Cost
0.003084FFFF33
Root Port 7
Forward Delay
19
Hello Time 2 Seconds Configuration Changes 22
Last Topology Change 15 Seconds 1 d 2 h 3 min 4 s
Parameter Description
Spanning Tree
State Shows if switch is enabled to participate in an
STA compliant network.
Bridge ID A unique identifier for this bridge, consisting of
bridge priority plus MAC address (where the
address is normally taken from Port 1).
Max Age The maximum time (in seconds) a device can
wait without receiving a configuration message
before attempting to reconfigure.
Hello Time The time interval (in seconds) at which the root
device transmits a configuration message.