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Bridge
This is the second category of the Web-based management program. The Bridge options include Configure
Spanning Tree Protocol (Switch STP and Port STP), Configure Filtering and Forwarding Table
(Address Setup, Custom FDB, Filter Table, and Multicast FDB), and Configure IGMP Filtering
(IGMP Setup and, depending on the VLAN/MAC-based broadcast domain setting, IGMP 802.1Q VLAN
Setup or IGMP Port Based VLAN Setup). See below for explanations of each one.
Configure Spanning Tree Protocol
Switch STP
The Switch supports the 801.2d Spanning Tree Protocol, which allows you to create alternative paths (with
multiple switches or other types of bridges) in your network. See the Spanning Tree Algorithm section of the
"Switch Management Concepts" chapter for a detailed explanation.
To configure Spanning Tree Protocol functions for the Switch or individual ports, enter the desired
information in the fields on this screen (see the descriptions below for assistance) and then click Apply.
The information on the screen is described as follows:
Spanning Tree Protocol Select Enabled to implement the Spanning Tree Protocol.
Time Since Topology Changes(sec) Read-only object displays the last time changes were made to
the network topology. These changes usually occur when backup paths are activated due to primary
path failures.
Topology Change Count Read-only object displays the number of times (since the current
management session with the device was started) changes were made to the network topology.
Changes usually occur on the network when backup paths are activated.
Designated Root Read-only object displays the MAC (Ethernet) address of the bridge/switch on the
network that has been chosen as the STP root.
Figure 7-12. Switch Spanning Tree Configurations window
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Gigabit Ethernet Switch User's Guide
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