Cisco Systems 3750E Manual De Usuario

16-12

Catalyst 3750-E and 3560-E Switch Software Configuration Guide

OL-9775-02

Chapter 16 Configuring Private VLANs

Configuring Private VLANs

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.

This example shows how to configure an interface as a private-VLAN host port, associate it with a
private-VLAN pair, and verify the configuration:

Switch# configure terminal

Switch(config)# interface gigabitethernet1/0/22

Switch(config-if)# switchport mode private-vlan host

Switch(config-if)# switchport private-vlan host-association 20 25

Switch(config-if)# end

Switch# show interfaces gigabitethernet1/0/22 switchport

Name: Gi1/0/22

Switchport: Enabled

Administrative Mode: private-vlan host

Operational Mode: private-vlan host

Administrative Trunking Encapsulation: negotiate

Operational Trunking Encapsulation: native

Negotiation of Trunking: Off

Access Mode VLAN: 1 (default)

Trunking Native Mode VLAN: 1 (default)

Administrative Native VLAN tagging: enabled

Voice VLAN: none

Administrative private-vlan host-association: 20 (VLAN0020) 25 (VLAN0025)

Administrative private-vlan mapping: none

Administrative private-vlan trunk native VLAN: none

Administrative private-vlan trunk Native VLAN tagging: enabled

Administrative private-vlan trunk encapsulation: dot1q

Administrative private-vlan trunk normal VLANs: none

Administrative private-vlan trunk private VLANs: none

Operational private-vlan:

20 (VLAN0020) 25 (VLAN0025)

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.

Step 3

switchport mode private-vlan host

Configure the Layer 2 port as a private-VLAN host port.

Step 4

switchport private-vlan host-association
primary_vlan_id secondary_vlan_id

Associate the Layer 2 port with a private VLAN.

Step 5

end

Return to privileged EXEC mode.

Step 6

show interfaces [interface-id] switchport Verify

the

configuration.

Step 7

copy running-config startup config

(Optional) Save your entries in the switch startup
configuration file.