Brocade Communications Systems IP250 user manual Configuring STP or Rstp on a port Vlan

Spanning Tree Protocol configuration 27

•RSTP — Rapid Spanning Tree Protocol (IEEE 802.1w Internet standard) is a refinement of STP, which provides for faster spanning tree convergence after a topology change.

•MSTP — Multiple Spanning Tree Protocol (IEEE 802.1s Internet standard) allows several VLANs to be mapped to a reduced number of spanning tree instances. This is possible because most networks do not need more than a few logical topologies. Each instance handles multiple VLANs that have the same Layer 2 topology.

DCB, Network OS (v3.0.0 and later), and IronWare products in standalone mode support viewing of STP, Rapid STP (RSTP), and Multiple STP (MSTP). Network OS products in standalone mode also support Per-VLAN Spanning Tree (PVST) and Rapid PVST (RPVST). For Network OS (v4.0.0 and later), configurations of Spanning Tree Protocol on PVLAN can be viewed in the STP Configuration dialog box.

Configuring STP or RSTP on a port VLAN

You can configure Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP) attributes from the VLAN View tab or the Product View tab on the VLAN Manager dialog box.

NOTE

The VLAN View tab displays VLAN membership information for the Brocade 6910 switch; however, STP configuration is not supported on the IronWare OS 6910 switch.

1.Perform one of the following tasks to select the VLAN on which STP or RSTP will be configured:

•On the VLAN View tab, expand the list of VLANs and select one or multiple VLANs on which STP or RSTP will be configured.

•On the Product View tab, expand the product, product group, or IP subnet folder that contains the products on which the VLAN you want is configured. Then expand the entry to display its VLAN and select the VLAN where STP or RSTP will be configured. You can select more than one VLAN from this tab.

For either view, you can use the Search tool to look for the VLAN on which STP or RSTP will be configured.

NOTE

The parameters display differently depending on whether the STP configuration is at the product, VLAN, or port level.

Either of these methods enables the STP button on the VLAN Manager dialog box.

2.Click the STP button on the VLAN Manager dialog box to display the STP Configuration dialog box (Figure 324).

The products on which the VLAN is configured appear on the dialog box.

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