Brocade FastIron Ethernet Switch Platform and Layer 2 Switching Configuration Guide - Manual (Page 317)

device(config-vlan-1)#spanning-tree priority 1
device(config-vlan-1)#tag ethernet 1/1 ethernet 5/1 to 5/3
device(config-vlan-1)#vlan 201
device(config-vlan-201)#spanning-tree priority 2
device(config-vlan-201)#tag ethernet 1/2 ethernet 5/1 to 5/3
device(config-vlan-201)#vlan 401
device(config-vlan-401)#spanning-tree priority 3
device(config-vlan-401)#tag ethernet 1/3 ethernet 5/1 to 5/3
...
device(config-vlan-3601)#vlan 3801
device(config-vlan-3801)#spanning-tree priority 20
device(config-vlan-3801)#tag ethernet 1/20 ethernet 5/1 to 5/3
device(config-vlan-3801)#exit
The next group of commands configures VLAN groups for the member VLANs. Notice that the VLAN
groups do not contain the VLAN numbers assigned to the master VLANs. Also notice that no STP
parameters are configured for the groups of member VLANs. Each group of member VLANs will inherit
its STP settings from its master VLAN.
Set the bridge priority for each master VLAN to the highest priority (1) on one of the devices in the STP
per VLAN group configuration. By setting the bridge priority to the highest priority, you make the device
the default root bridge for the spanning tree. To ensure STP load balancing, make each of the devices
the default root bridge for a different master VLAN.
device(config)#vlan-group 1 vlan 2 to 200
device(config-vlan-group-1)#tag ethernet 1/1 ethernet 5/1 to 5/3
device(config-vlan-group-1)#vlan-group 2 vlan 202 to 400
device(config-vlan-group-2)#tag ethernet 1/2 ethernet 5/1 to 5/3
device(config-vlan-group-2)#vlan-group 3 vlan 402 to 600
device(config-vlan-group-2)#tag ethernet 1/3 ethernet 5/1 to 5/3
...
device(config-vlan-group-19)#vlan-group 20 vlan 3082 to 3282
device(config-vlan-group-20)#tag ethernet 1/20 ethernet 5/1 to 5/3
device(config-vlan-group-20)#exit
The following group of commands configures the STP groups. Each STP group in this configuration
contains one master VLAN, which contains a VLAN group. This example shows that an STP group also
can contain additional VLANs (VLANs not configured in a VLAN group).
device(config)#stp-group 1
device(config-stp-group-1)#master-vlan 1
device(config-stp-group-1)#member-group 1
device(config-stp-group-1)#member-vlan 4001 4004 to 4010
device(config-stp-group-1)#stp-group 2
device(config-stp-group-2)#master-vlan 201
device(config-stp-group-2)#member-group 2
device(config-stp-group-2)#member-vlan 4002 4003 4011 to 4015
device(config-stp-group-2)#stp-group 3
device(config-stp-group-3)#master-vlan 401
device(config-stp-group-3)#member-group 3
...
device(config-stp-group-19)#stp-group 20
device(config-stp-group-20)#master-vlan 3081
device(config-stp-group-20)#member-group 20
PVST/PVST+ compatibility
The FastIron family of switches support Cisco's Per VLAN Spanning Tree plus (PVST+), by allowing the
device to run multiple spanning trees (MSTP) while also interoperating with IEEE 802.1Q devices
1 .
NOTE
Brocade ports automatically detect PVST+ BPDUs and enable support for the BPDUs once detected.
You do not need to perform any configuration steps to enable PVST+ support. However, to support the
IEEE 802.1Q BPDUs, you might need to enable dual-mode support.
PVST/PVST+ compatibility
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