HP 3400CL-24G manual Enabling Mstp on the Switch, PreConfiguring VLANs in an MST Instance

Enhancements

Release M.10.65 Enhancements

All switches in a region must be configured with the same VLAN ID-to-MSTI mappings and the same MSTP configuration identifiers (region name and revision number).

■Flexibility: By preconfiguring identical VLAN ID-to-MSTI mappings on all switches in an MST region, you can combine switches that support different maximum numbers of VLANs.

■Network stability: You can reduce the interruptions in network connectivity caused by the regeneration of spanning trees in the entire network each time a configuration change in VLAN- to-MSTI mapping is detected on a switch. The negative impact on network performance is reduced if all newly created VLANs are pre-mapped to the correct MST instances. Later, VLAN creation and deletion are ignored by MSTP and no interruption in spanning-tree traffic occurs.

■Usability: Dynamically learned GVRP VLANs can be mapped to MSTIs and support MSTP load balancing.

Enabling MSTP on the Switch

If you have not enabled MSTP on the switch, you must enable it to use this feature. To enable MSTP, perform these steps.

1.Enter the command to enable MSTP:

ProCurve(config)# spanning-tree protocol-version mstp

You will see this message:

STP version was changed. To activate the change you must save the configuration to flash and reboot the device.

2.Save the configuration change to flash.

ProCurve(config)# write mem

3.Reboot the switch.

ProCurve(config)# reload

Device will be rebooted, do you want to continue [y/n]? y

PreConfiguring VLANs in an MST Instance

When you configure an MSTP regional topology, you create multiple spanning-tree instances. Each MST instance provides a fully connected active topology for a particular set of VLANs.

Each switch in an MSTP region is configured with the following set of common parameters:

■Region name (spanning-tree config-name)

■Region revision number (spanning-tree config-revision)

■Identical VLAN ID-to-MSTI mapping (spanning-tree instance vlan)

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