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PowerConnect B-Series FCX Configuration Guide 275
53-1002266-01
PVST/PVST+ compatibility
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PowerConnect(config-vlan-201)#tag ethernet 1/2 ethernet 5/1 to 5/3
PowerConnect(config-vlan-201)#vlan 401
PowerConnect(config-vlan-401)#spanning-tree priority 3
PowerConnect(config-vlan-401)#tag ethernet 1/3 ethernet 5/1 to 5/3
...
PowerConnect(config-vlan-3601)#vlan 3801
PowerConnect(config-vlan-3801)#spanning-tree priority 20
PowerConnect(config-vlan-3801)#tag ethernet 1/20 ethernet 5/1 to 5/3
PowerConnect(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.
PowerConnect(config)#vlan-group 1 vlan 2 to 200
PowerConnect(config-vlan-group-1)#tag ethernet 1/1 ethernet 5/1 to 5/3
PowerConnect(config-vlan-group-1)#vlan-group 2 vlan 202 to 400
PowerConnect(config-vlan-group-2)#tag ethernet 1/2 ethernet 5/1 to 5/3
PowerConnect(config-vlan-group-2)#vlan-group 3 vlan 402 to 600
PowerConnect(config-vlan-group-2)#tag ethernet 1/3 ethernet 5/1 to 5/3
...
PowerConnect(config-vlan-group-19)#vlan-group 20 vlan 3082 to 4000
PowerConnect(config-vlan-group-20)#tag ethernet 1/20 ethernet 5/1 to 5/3
PowerConnect(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).
PowerConnect(config)#stp-group 1
PowerConnect(config-stp-group-1)#master-vlan 1
PowerConnect(config-stp-group-1)#member-group 1
PowerConnect(config-stp-group-1)#member-vlan 4001 4004 to 4010
PowerConnect(config-stp-group-1)#stp-group 2
PowerConnect(config-stp-group-2)#master-vlan 201
PowerConnect(config-stp-group-2)#member-group 2
PowerConnect(config-stp-group-2)#member-vlan 4002 4003 4011 to 4015
PowerConnect(config-stp-group-2)#stp-group 3
PowerConnect(config-stp-group-3)#master-vlan 401
PowerConnect(config-stp-group-3)#member-group 3
...
PowerConnect(config-stp-group-19)#stp-group 20
PowerConnect(config-stp-group-20)#master-vlan 3081
PowerConnect(config-stp-group-20)#member-group 20
PVST/PVST+ compatibility
The PowerConnect 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
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