MSTP global level parameters
To configure a switch for MSTP, first you set the region name and the revision on each switch that is being configured for MSTP. You must then create an MSTP Instance and assign an ID. VLANs are then assigned to MSTP instances. These instances must be configured on all switches that interoperate with the same VLAN assignments.
Each of the steps used to configure and operate MSTP are described in the following:
Note
The MSTP Region and Revision global parameters are enabled for interface level parameters as described below.
- Set the MSTP region name — Each switch that is running MSTP is configured with a name. It applies to the switch which can have many different VLANs that can belong to many different MSTP regions. The default MSTP name is "NULL".
- Set the MSTP revision number — Each switch that is running MSTP is configured with a revision number. It applies to the switch, which can have many different VLANs that can belong to many different MSTP regions.
- Enabling and disabling Cisco interoperability — While in MSTP mode, use the
cisco-interoperability command to enable or disable the ability to interoperate with certain legacy Cisco switches. If Cisco interoperability is required on any switch in the network, then all switches in the network must be compatible, and therefore enabled by means of this command. By default the Cisco interoperability is disabled.
- The parameters you would normally set when you configure STP are applicable to MSTP. Before you configure MSTP parameters see the sections explaining bridge parameters, the error disable timeout parameter and the port-channel path cost parameter in the STP section of this guide.
