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112 Intel® NetStructure™ ZT 8101 10/100 Ethernet Switch User’s Manual
Using the Web Console
Advanced Setup
Most of the following options can be configured independently of the other options. However, you
must configure a VLAN before you can configure an IP interface for it.
Spanning Tree Protocol
The Spanning Tree Protocol (STP) prevents loops in a network by allowing only one active path
between any two network devices at a time. (For more information about using this protocol, refer
to “Spanning Tree Protocol” in chapter 3.)
STP operates on two levels. On the switch level, the settings are globally implemented. On the port
level, the settings are implemented on a user-defined group basis. STP must be enabled on the
switch for it to be enabled on a particular port.
To configure STP switch settings
1. In the left panel, click Spanning Tree.
2. In the top panel, click STP Switch Settings.
3. In the Status field, select to Enabled or Disabled.
4. Configure the following fields. The factory default settings should cover the majority of
installations, and most installations should keep these default settings.
Field Default Description
Max Age 20
Specifies the maximum time (in seconds) the switch will wait
for a configuration message from the root bridge. At the end
of this time, the switch will start sending out its own
configuration messages for permission to become the root
bridge.
The device with the lowest bridge identifier becomes the root
bridge (see the Priority field).
Max Age must be set within the following range:
• The minimum value is the higher of 6 or [2 x (Hello Time
+1)]
• The maximum value is the lower of 40 or [2 x (Forward
Delay -1)]
Hello Time 2
Specifies the time interval (in seconds) between two
configuration messages. The root bridge sends these
messages at this interval to inform all other devices that it is
the root bridge. This time will be used if and when your switch
becomes the root bridge.
It can be set from 1—10 seconds.
The Hello Time cannot be longer than the Max Age;
otherwise, a configuration error occurs.