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294 PowerConnect B-Series FCX Configuration Guide
53-1002266-01
802.1s Multiple Spanning Tree Protocol
8
• “Forcing ports to transmit an MSTP BPDU”
• “Activating MSTP on a switch”
Setting the MSTP 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.
To configure an MSTP name, use a command such as the following at the Global Configuration
level.
PowerConnect(config)#mstp name Dell
Syntax: [no] mstp name <name>
The name parameter defines an ASCII name for the MSTP configuration. The default name is for
the name variable to be blank.
Setting 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.
To configure an MSTP revision number, use a command such as the following at the Global
Configuration level.
PowerConnect(config)#mstp revision 4
Syntax: [no] mstp revision <revision-number>
The revision parameter specifies the revision level for MSTP that you are configuring on the switch.
It can be a number from 0 and 65535. The default revision number is 0.
Configuring an MSTP instance
An MSTP instance is configured with an MSTP ID for each region. Each region can contain one or
more VLANs. The Dell implementation of MSTP allows you to assign VLANS or ranges of VLANs to
an MSTP instance before or after they have been defined. If pre-defined, a VLAN will be placed in
the MSTI that it was assigned to immediately when the VLAN is created. Otherwise, the default
operation is to condition of assign all new VLANs to the CIST. VLANs assigned to the CIST by default
can be moved later to a specified MSTI.
To configure an MSTP instance and map one or more VLANs to that MSTI, use a command such as
the following at the Global Configuration level.
PowerConnect(config)#mstp instance 7 vlan 4 to 7
Syntax: [no] mstp instance <instance-number> [ vlan <vlan-id> | vlan-group <group-id> ]
The instance parameter defines the number for the instance of MSTP that you are configuring. The
value 0 (which identifies the CIST) cannot be used. You can have up to 15 instances, number 1 –
4094.
The vlan parameter assigns one or more VLANs or a range of VLANs to the instance defined in this
command.
The vlan-group parameter assigns one or more VLAN groups to the instance defined in this
command.