spanning-tree mstp version

Syntax

• default spanning-tree mstp version

• spanning-tree mstp version mstp

• spanning-tree mstp version rstp

• spanning-tree mstp version stp-compatible

Command Parameters

mstp

Configures the version as MSTP.

rstp

Configures the version as RSTP.

stp-compatible

Configures the version as STP compatible.

Although STP and MSTP are variations of the same spanning tree protocol, they communicate information differently. A switch in MSTI mode cannot recognize the spanning tree groups running on a chassis configured with Nortel STP. MSTP spanning tree groups are not the same as Nortel STP spanning tree groups.

Using a switch in MSTP mode with another chassis in STP mode can create a loop in the network. You must configure protocol migration to true on all spanning-tree enabled interfaces when you change the spanning tree version from STP-compatible to MSTP for those interfaces to work in the proper mode.

Default

The default is MSTP.

Command Mode

Global Configuration