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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
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Chapter 11 Configuring VLANs
Creating and Modifying VLANs
Beginning in privileged EXEC mode, follow these steps to release a VLAN ID that is assigned to an
internal VLAN and to create an extended-range VLAN with that ID:
Configuring UNI-ENI VLANs
By default, every VLAN configured on the switch is a UNI-ENI isolated VLAN. Y ou can change VLAN
configuration to that of a UNI-ENI community VLAN, a private VLAN. or an RSPAN VLAN. You can
also change the configuration of one of these VLANs to the default of a UNI-ENI isolated VLAN.
Configuration Guidelines
These are the guidelines for UNI-ENI VLAN configuration:
• UNI-ENI isolated VLANs have no effect on NNI ports.
• A UNI-ENI community VLAN is like a traditional VLAN except that it can include no more than a
combination of eight UNIs and ENIs.
• To change a VLAN type, first enter the vlan vlan-id global co nfiguration command to enter VLAN
configuration mode:
–
To change a VLAN from UNI-ENI isolated VLAN to a private VLAN, enter the private-vlan
VLAN configuration command.
–
To change a UNI-ENI community VLAN to a private VLAN, you must first remove the
community VLAN type by entering the no uni-vlan VLAN configuration command. Then enter
the private-vlan VLAN configuration command.
–
To change a VLAN from a UNI-ENI isolated VLAN to an RSPAN VLAN, enter the rspan-vlan
VLAN configuration command.
Command Purpose
Step 1 show vlan internal usage Display the VLAN IDs being used internally by the switch. If the VLAN
ID that you want to use is an internal VLAN, the display shows the routed
port that is using the VLAN ID. Enter that port number in Step 3.
Step 2 configure terminal Enter global configuration mode.
Step 3 interface interface-id Specify the interface ID for the routed port that is using the VLAN ID,
and enter interface configuration mode.
Step 4 shutdown Shut down the port to release the internal VLAN ID.
Step 5 exit Return to global configuration mode.
Step 6 vlan vlan-id Enter the new extended-range VLAN ID, and enter config-vlan mode.
Step 7 exit Exit from config-vlan mode, and return to global configuration mode.
Step 8 interface interface-id Specify the interface ID for the routed port that you shut down in Step 4,
and enter interface configuration mode.
Step 9 no shutdown Re-enable the routed port. It will be assigned a new internal VLAN ID.
Step 10 end Return to privileged EXEC mode.
Step 11 copy running-config startup config (Optional) Save your entries in the switch startup configuration file.