Using VLANs, Spanning Tree, and Hunt Groups (Layer 2 and Layer 3)

Spanning Tree Bridge Options

The three spanning tree options are:

❒If you use the default 802.1D spanning tree option, the entire switch is a bridge, for which spanning tree parameters can be set. Every port, regardless of VLAN membership, is part of the same spanning tree. The implication is that after resolving the spanning tree topology, only one trunk will be active, and all others will be blocked.

❒If you use the Spanning Tree per VLAN option, each VLAN runs a separate spanning tree with its own BPDUs. This allows different ports to blocked or unblocked on different VLANs.

❒If you use the dual layer spanning tree option, within a set of interconnected Cajun switches, you can set up a separate spanning tree for each VLAN. The switch then runs a second level of spanning tree to control routes between switches in the Cajun Network. This creates smaller spanning tree domains and provides quicker convergence upon reconfiguration.

Managing Spanning Trees

To manage spanning trees:

1.In the Switching Parameters section of the Web Agent window, click Spanning Tree. The Spanning Tree Information dialog box opens.

2.From the Configuration pull-down menu, select the type of spanning tree you want to implement.

3.Use Table 12-3 to select your Spanning Tree options:

Cajun P550/P220 Switch Operation Guide

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