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17
APRIL 2008
MSTP INTEROPERABILITY OF THE DELL™ POWERCONNECT™ 6200 SERIES SWITCHES
WITH CISCO IOS AND CISCO CATOS-BASED SWITCHES
Command Description
switchport mode trunk
Enable trunking on the interface
exit
Exit to configuration mode
interface GigabitEthernet 1/0/2
Enter configuration mode for the interface
on slot 1, port 2
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
switchport mode trunk
Enable trunking on the interface
exit
Exit to configuration mode
spanning-tree mst configuration
Enter the configuration mode for MST
name Dell
Create Dell as the MST configuration name
instance 1 vlan 10
Map VLAN 10 to MST instance 1
instance 2 vlan 20
Map VLAN 20 to MST instance 2
exit
Exit to configuration mode
spanning-tree mst 2 priority 0
Sets the switch priority for MSTP instance
2 to zero, which essentially sets this switch
as the root bridge for MSTP instance 2
exit
Exit to Privileged EXEC mode
CONFIGURING EDGE DEVICES
The configuration examples for BrA, BrB, and BrC show trunk ports between bridges. To
configure a port to any VLAN-unaware devices or edge devices, you must add the ports in
access mode. An access port connects to a single end station belonging to a single VLAN.
The following commands, executed on the Dell PowerConnect switch BrB, show how to send
untagged traffic into port 1/g5 that must pass through vlan 10 or MSTP instance 1.
Dell_BrB(config)#interface ethernet 1/g5
Dell_BrB(config-if-1/g5)#switchport mode access
Dell_BrB(config-if-1/g5)#switchport access vlan 10
Dell_BrB(config-if-1/g5)#exit
Command Description
interface ethernet 1/g5
Enter configuration mode for the interface
on slot 1, port 5
switchport mode access
Configure the VLAN membership mode of
the port as access
switchport access vlan 10
Configure the VLAN ID to use when the
interface is in access mode. This also sets
port PVID to 10
exit
Exit to configuration mode