Dell PowerConnect B-FCXs Configuration Manual page 339

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When a port is disabled for MSTP, it behaves as blocking for all the VLAN traffic that is controlled by
MSTIs and the CIST.
Forcing ports to transmit an MSTP BPDU
To force a port to transmit an MSTP BPDU, use a command such as the following at the Global
Configuration level.
PowerConnect(config)#mstp force-migration-check ethernet 3/1
Syntax: [no] mstp force-migration-check ethernet <port>
The <port> variable specifies the port or ports from which you want to transmit an MSTP BPDU.
Specify the <port> variable in the following formats:
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Activating MSTP on a switch
MSTP scope must be enabled on the switch as described in
on page 290 before MSTP can be enabled.
To enable MSTP on your switch, use the following at the Global Configuration level.
PowerConnect(config)#mstp start
Syntax: [no] mstp start
The [no] option disables MSTP from operating on a switch.
Example
In Figure 57
instances in Region 2. Region 1 is in the CIST.
PowerConnect B-Series FCX Configuration Guide
53-1002266-01
PowerConnect B-Series FCX stackable switches – <stack-unit/slotnum/portnum>
PowerConnect B-Series FCX stackable switches – <stack-unit/slotnum/portnum>
four Brocade device routers are configured in two regions. There are four VLANs in four
802.1s Multiple Spanning Tree Protocol
"Configuring MSTP mode and scope"
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