Configuration Guide User guide

1178 FastIron Configuration Guide
53-1002494-02
802.1s Multiple Spanning Tree Protocol
Disabling MSTP on a port
To disable MSTP on a specific port, use a command such as the following at the Global
Configuration level.
Brocade(config)#mstp disable ethernet 2/1
Syntax: [no] mstp disable ethernet <port>
The <port> variable specifies the location of the port for which you want to disable MSTP. Specify
the port variable in one of the following formats:
• FWS, FCX, and ICX stackable switches – stack-unit/slotnum/portnum
• FSX 800 and FSX 1600 chassis devices – slotnum/portnum
• ICX devices – slotnum/portnum
• FESX compact switches – portnum
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.
Brocade(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 one of the following formats:
• FWS, FCX, and ICX stackable switches – stack-unit/slotnum/portnum
• FSX 800 and FSX 1600 chassis devices – slotnum/portnum
• ICX devices – slotnum/portnum
• FESX compact switches – portnum
Activating MSTP on a switch
MSTP scope must be enabled on the switch as described in “Configuring MSTP mode and scope”
on page 1171 before MSTP can be enabled.
To enable MSTP on your switch, use the following at the Global Configuration level.
Brocade(config)#mstp start
Syntax: [no] mstp start
The [no] option disables MSTP from operating on a switch.