C
HAPTER
36
| VLAN Commands
Configuring Private VLANs
– 853 –
private-vlan Use this command to create a primary or community private VLAN. Use the
no form to remove the specified private VLAN.
SYNTAX
private-vlan vlan-id {community | primary}
no private-vlan vlan-id
vlan-id - ID of private VLAN. (Range: 1-4093, no leading zeroes).
community - A VLAN in which traffic is restricted to host
members in the same VLAN and to promiscuous ports in the
associate primary VLAN.
primary - A VLAN which can contain one or more community
VLANs, and serves to channel traffic between community VLANs
and other locations.
DEFAULT SETTING
None
COMMAND MODE
VLAN Configuration
COMMAND USAGE
◆ Private VLANs are used to restrict traffic to ports within the same
community, and channel traffic passing outside the community through
promiscuous ports. When using community VLANs, they must be
mapped to an associated “primary” VLAN that contains promiscuous
ports.
◆ Port membership for private VLANs is static. Once a port has been
assigned
to a private VLAN, it cannot be dynamically moved to another
VLAN via GVRP.
◆ Private VLAN ports cannot be set to trunked mode. (See "switchport
mode" on page 842.)
EXAMPLE
Console(config)#vlan database
Console(config-vlan)#private-vlan 2 primary
Console(config-vlan)#private-vlan 3 community
Console(config)#
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