DCFM Enterprise User Manual (53-1001775-01, June 2010)

DCFM Enterprise User Manual 455

53-1001775-01

Spanning Tree Protocol configuration

You can configure Spanning Tree Protocol (STP) when editing a LAG, but not when you are adding a

LAG. The 8 Gbps 16-FC-ports, 10 GbE 8-Ethernet Port, and the 10 Gbps CEE/FC switch module

support the following types of STP:

• Spanning Tree Protocol (STP)

• Rapid Spanning Tree Protocol (RSTP) - Provides for faster spanning tree convergence after a

topology change. While STP can take 30 to 50 seconds to respond to a topology change, RSTP

is typically able to respond to changes within a second.

• Multiple Spanning Tree Protocol (MSTP) - Provides support for virtual LANs (VLANs). This

“per-VLAN” Multiple Spanning Tree Protocol configures a separate spanning tree for each VLAN

group and blocks the links that are redundant within each spanning tree.

NOTE

STP is not supported for internal ports.

See “Spanning Tree Protocol policy” on page 427 for general information about Spanning Tree

Protocol.

Enabling Spanning Tree Protocol

1. Select Configure > Switch > CEE from the menu bar.

The CEE Configuration dialog box displays, showing the status of all CEE-related hardware and

functions.

2. Select a switch, and click Edit.

3. Click the Spanning Tree Protocol tab on the Edit Switch dialog box.

The Enable Spanning Tree Protocol dialog box displays.

4. Configure the Spanning Tree parameters, which are described in “Setting Spanning Tree

parameters for a switch” on page 456.

5. Click OK.

The CEE Confirmation and Status dialog box displays.

6. Review the changes carefully before you accept them.

7. Clic k Start to apply the changes, or click Close to abort the operation.