Cisco Systems 3750E manual Show vlan private-vlan type, Show interfaces status, 16-11

Chapter 16 Configuring Private VLANs

Configuring Private VLANs

	Command	Purpose
Step 15
	show vlan private-vlan [type]	Verify the configuration.
	or
	show interfaces status
Step 16
	copy running-config startup config	Save your entries in the switch startup configuration file. To save the
		private-VLAN configuration, you need to save the VTP transparent
		mode configuration and private-VLAN configuration in the switch
		startup configuration file. Otherwise, if the switch resets, it defaults to
		VTP server mode, which does not support private VLANs.

When you associate secondary VLANs with a primary VLAN, note this syntax information:

•The secondary_vlan_list parameter cannot contain spaces. It can contain multiple comma-separated items. Each item can be a single private-VLAN ID or a hyphenated range of private-VLAN IDs.

•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 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:

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)#	private-vlan	community
Switch(config-vlan)#	exit
Switch(config)# vlan	503
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

	Catalyst 3750-E and 3560-E Switch Software Configuration Guide
OL-9775-02		16-11