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DES-3028 DES-3028P DES-3052 DES-3052P Layer 2 Fast Ethernet Managed Switch

STP Port Settings

STP can be set up on a port per port basis. To view the following window click L2 Features > Spanning Tree > STP Port

Settings:

Figure 7- 17. STP Port Settings window

In addition to setting Spanning Tree parameters for use on the switch level, the Switch allows for the configuration of groups of

ports, each port-group of which will have its own spanning tree, and will require some of its own configuration settings. An STP

Group will use the switch-level parameters entered above, with the addition of Port Priority and Port Cost.

An STP Group spanning tree works in the same way as the switch-level spanning tree, but the root bridge concept is replaced with

a root port concept. A root port is a port of the group that is elected based on port priority and port cost, to be the connection to the

network for the group. Redundant links will be blocked, just as redundant links are blocked on the switch level.

The STP on the switch level blocks redundant links between switches (and similar network devices). The port level STP will

block redundant links within an STP Group.

It is advisable to define an STP Group to correspond to a VLAN group of ports.

The following fields can be set:

Parameter Description

From/To

A consecutive group of ports may be configured starting with the selected port.

State

Toggle from Disabled to Enabled to implement BPDU packet forwarding.

Cost (0 = Auto)

External Cost - This defines a metric that indicates the relative cost of forwarding packets

to the specified port list. Port cost can be set automatically or as a metric value. The

default value is 0 (auto).

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D-Link DES-3052 Spécifications Page 105