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APRIL 2008
MSTP INTEROPERABILITY OF THE DELL™ POWERCONNECT™ 6200 SERIES SWITCHES
WITH CISCO IOS AND CISCO CATOS-BASED SWITCHES
CONFIGURING BRIDGE BrB
To configure Bridge BrB, use the same commands as you used to configure Bridge BrA with
one exception: do not use the spanning-tree mst 1 priority 0 command on Bridge
BrB because it is not a root bridge for any instance. If you use the Web interface to configure
Bridge BrB, do not enter a new value in the Priority field on the Switching > Spanning Tree >
MSTP Settings page.
CONFIGURING BRIDGE BrC
Use the commands in this section to configure the Cisco Catalyst3750 switch as bridge BrA.
Cisco3750_BrC(vlan)#vlan 10
VLAN 10 added:
Name: VLAN010
Cisco3750_BrC(vlan)#vlan 20
VLAN 20 added:
Name: VLAN020
Cisco3750_BrC(vlan)#exit
APPLY completed.
Exiting....
Cisco3750_BrC#configure terminal
Cisco3750_BrC(config)#interface GigabitEthernet 1/0/1
Cisco3750_BrC(config-if)#switchport trunk encapsulation dot1q
Cisco3750_BrC(config-if)#switchport trunk allowed vlan 10,20
Cisco3750_BrC(config-if)#switchport mode trunk
Cisco3750_BrC(config-if)#exit
Cisco3750_BrC(config)#interface GigabitEthernet 1/0/2
Cisco3750_BrC(config-if)#switchport trunk encapsulation dot1q
Cisco3750_BrC(config-if)#switchport trunk allowed vlan 10,20
Cisco3750_BrC(config-if)#switchport mode trunk
Cisco3750_BrC(config-if)#exit
Cisco3750_BrC(config)#spanning-tree mst configuration
Cisco3750_BrC(config-mst)#name Dell
Cisco3750_BrC(config-mst)#instance 1 vlan 10
Cisco3750_BrC(config-mst)#instance 2 vlan 20
Cisco3750_BrC(config-mst)#exit
Cisco3750_BrC(config)#spanning-tree mst 2 priority 0
Cisco3750_BrC(config)#exit
Cisco3750_BrC#exit
Command Description
vlan 10
Create VLAN 10
vlan 20
Create VLAN 20
exit
Exit to privileged EXEC mode
configure terminal
Enter configuration mode
interface GigabitEthernet 1/0/1
Enter configuration mode for the
interface on slot 1, port 1
switchport trunk
encapsulation dot1q
Set the trunking encapsulation format
to 802.1Q
switchport trunk allowed
vlan 10,20
Add VLANs 10 and 20 to the trunk port