3Com 3CBLSF26H manual Configuring STP

Figure 3-33LACP Summary Page

The LACP Summary Page contains the following fields:

Table 3-24LACP Summary Page item description

Item	Description
Port-Priority	Displays the LACP priority value for the port.
	Displays the administrative LACP timeout. The possible field values are:
LACP Timeout	z Long: Specifies the long timeout value. This is the default.
	z Short: Specifies the short timeout value.
Group ID	Display LAG ID which the port belongs to. N/A: unassigned.

Configuring STP

STP (Spanning Tree Protocol) is a bridge-based system for providing fault tolerance on networks and can be used to detect and disable network loops. The spanning tree ensures that the optimal path is maintained between spanning tree-compliant networked devices by:

z

z

Disabling redundant paths when the main paths are operational. Enabling redundant paths if the main paths fail.

Spanning tree uses a distributed algorithm to select a bridging device that serves as the root of the spanning tree network.

The bridging device, known as the Root Bridge, generates bridge protocol data units (BPDUs) on all ports at a regular interval known as the Hello Time. All other spanning tree-compliant devices on the network have a designated Root Port. This is the Port nearest the Root Bridge and it is used for receiving the BPDUs initiated by the Root Bridge. If a bridge does not get a Hello BPDU after a predetermined interval, the bridge assumes that the link to the Root Bridge is down. This bridge will then initiate negotiations with other bridges to reconfigure the network to reestablish a valid network topology.

After all the bridges on the network have determined the configuration of their ports, each bridge only forwards traffic between the Root Port and the ports that are the Designated Bridge Ports for each

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