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Cisco ME 3400 Ethernet Access Switch Software Configuration Guide
OL-9639-06
Chapter 12 Configuring Private VLANs
Configuring Private VLANs
• The secondary_vlan_list parameter can contain multiple community VLAN IDs but only one
isolated VLAN ID.
• Enter a secondary_vlan_list, or use the add keyword with a secondary_vlan_list to associate
secondary VLANs with a primary VLAN.
• Use the remove keyword with a secondary_vlan_list to clear the association between secondary
VLANs and a primary VLAN.
• The private-vlan association VLAN configuration command does not take effect until you exit
VLAN configuration mode.
This example shows how to configure VLAN 20 as a primary VLAN, VLAN 501 as an isolated VLAN,
and VLANs 502 and 503 as community VLANs, to associate them in a private VLAN, and to verify the
configuration. It assumes that VLANs 502 and 503 have previously been configured as UNI-ENI
community VLANs:
Switch# configure terminal
Switch(config)# vlan 20
Switch(config-vlan)# private-vlan primary
Switch(config-vlan)# exit
Switch(config)# vlan 501
Switch(config-vlan)# private-vlan isolated
Switch(config-vlan)# exit
Switch(config)# vlan 502
Switch(config-vlan)# no-uni vlan
Switch(config-vlan)# private-vlan community
Switch(config-vlan)# exit
Switch(config)# vlan 503
Switch(config-vlan)# no-uni vlan
Switch(config-vlan)# private-vlan community
Switch(config-vlan)# exit
Switch(config)# vlan 20
Switch(config-vlan)# private-vlan association 501-503
Switch(config-vlan)# end
Switch(config)# show vlan private vlan
Primary Secondary Type Ports
------- --------- ----------------- ------------------------------------------
20 501 isolated
20 502 community
20 503 community
20 504 non-operational
Configuring a Layer 2 Interface as a Private-VLAN Host Port
Beginning in privileged EXEC mode, follow these steps to configure a Layer 2 interface as a
private-VLAN host port and to associate it with primary and secondary VLANs:
Note Isolated and community VLANs are both secondary VLANs.
Command Purpose
Step 1
configure terminal Enter global configuration mode.
Step 2
interface interface-id Enter interface configuration mode for the Layer 2
interface to be configured.