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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-06
Chapter 11 Configuring VLANs Creating and Modifying VLANs
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To change a UNI-ENI community VLAN to an RSPAN VLAN, you must first remove the
community VLAN type by entering the no uni-vlan VLAN configuration command. Then enter
the rspan-vlan VLAN configuration command.
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To change a private VLAN to a UNI-ENI VLAN, you must first remove the private VLAN type
by entering the no private-vlan VLAN configuration command. Then enter the uni-vlan
VLAN configuration command.
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To change an RSPAN VLAN to a UNI-ENI VLAN, you must first remove the RSPAN VLAN
type by entering the no rspan-vlan VLAN configuration command. Then enter the uni-vlan
VLAN configuration command
• The switch supports a total of eight UNIs and ENIs in a community VLAN. You cannot configure a
VLAN as a UNI-ENI community VLAN if more than eight UNIs and ENIs belong to the VLAN.
• If you attempt to add a UNI or ENI static access port to a UNI-ENI community VLAN that has a
combination of eight UNIs and ENIs, the configuration is refused. If a UNI or ENI dynamic access
port is added to a UNI-ENI community VLAN that has eight UNIs or ENIs, the port is
error-disabled.
• Use caution when configuring ENIs and UNIs in the same community VLAN. Local switching takes
place between the ENIs and UNIs in the community VLAN and ENIs can support spanning tree
while UNIs do not.
Configuring UNI-ENI VLANs
By default, every VLAN created on the switch is a UNI-ENI isolated VLAN. You can change the
configuration to UNI-ENI community VLAN or to a private VLAN or RSPAN VLAN. For procedures
for configuring private VLANs or RSPAN VLANs, see Chapter 12, “Configuring Private VLANs” and
Chapter 26, “Configuring SPAN and RSPAN.”
Beginning in privileged EXEC mode, follow these steps to change the type of a UNI-ENI VLAN:
Command Purpose
Step 1 configure terminal Enter global configuration mode.
Step 2 vlan vlan-id Enter a VLAN ID, and enter VLAN configuration mode. Enter a new VLAN
ID to create a VLAN, or enter an existing VLAN ID to modify that VLAN.
By default, the VLAN is a UNI-ENI isolated VLAN.
Note The available VLAN ID range for this command is 1 to 4094.
Step 3 uni-vlan {community | isolated} Configure the UNI-ENI VLAN type.
• Enter community to change from the default to a UNI-ENI community
VLAN.
• Enter isolated to return to the default UNI-ENI isolated VLAN.
Note VLAN 1 is always a UNI-ENI isolated VLAN; you cannot configure
VLAN 1 as a UNI-ENI community VLAN. The reserved VLANs
1002 to 1005 are not Ethernet VLANs.
Step 4 end Return to privileged EXEC mode.
Step 5 show vlan uni-vlan [type]Display UNI-ENI VLAN information. Enter type (optional) to see only the
VLAN ID and type of UNI-ENI VLAN.
Step 6 copy running-config startup config (Optional) Save the configuration in the switch startup configuration file.