Contents

Introduction· 1

Prerequisites· 1

General configuration restrictions and guidelines· 1

Example: Configuring port isolation· 1

Network configuration· 1

Applicable hardware and software versions· 2

Restrictions and guidelines· 2

Procedures· 2

Verifying the configuration· 3

Configuration files· 4

Introduction

This document provides port isolation configuration examples.

Prerequisites

This document is not restricted to specific software or hardware versions.

The configuration examples in this document were created and verified in a lab environment, and all the devices were started with the factory default configuration. When you are working on a live network, make sure you understand the potential impact of every command on your network.

This document assumes that you have basic knowledge of port isolation.

General configuration restrictions and guidelines

You cannot assign the member ports of a service loopback group to an isolation group. You cannot assign the member ports of an isolation group to a service loopback group.

Example: Configuring port isolation

Network configuration

As shown in Figure 1, the company branches Site 1 and Site 2 transfer service traffic in VLAN 2 and VLAN 3. Device A connects to the Internet through Ten-GigabitEthernet 1/0/1.

Configure port isolation on Device A to meet the following requirements:

·     All hosts can access the Internet through Device A.

·     Host A and Host B are isolated from each other at Layer 2.

·     Host C and Host D are isolated from each other at Layer 2.

Figure 1 Network diagram

Applicable hardware and software versions

The following matrix shows the hardware and software versions to which this configuration example is applicable:

Restrictions and guidelines

When you configure port isolation on the device, follow these restrictions and guidelines:

·     Before assigning a port to an isolation group, make sure the isolation group already exists.

·     You can assign a port to only one isolation group.

Procedures

# Create VLAN 2 and assign ports Ten-GigabitEthernet 1/0/2 and Ten-GigabitEthernet 1/0/3 to the VLAN.

<DeviceA> system-view

[DeviceA] vlan 2

[DeviceA-vlan2] port ten-gigabitethernet 1/0/2

[DeviceA-vlan2] port ten-gigabitethernet 1/0/3

[DeviceA-vlan2] quit

# Create VLAN 3 and assign ports Ten-GigabitEthernet 1/0/4 and Ten-GigabitEthernet 1/0/5 to the VLAN.

[DeviceA] vlan 3

[DeviceA-vlan3] port ten-gigabitethernet 1/0/4

[DeviceA-vlan3] port ten-gigabitethernet 1/0/5

[DeviceA-vlan3] quit

# Configure port Ten-GigabitEthernet 1/0/1 as a trunk port and assign it to VLAN 2 and VLAN 3.

[DeviceA] interface ten-gigabitethernet 1/0/1

[DeviceA-Ten-GigabitEthernet1/0/1] port link-type trunk

[DeviceA-Ten-GigabitEthernet1/0/1] port trunk permit vlan 2 3

[DeviceA-Ten-GigabitEthernet1/0/1] quit

# Create isolation groups 1 and 2.

[DeviceA] port-isolate group 1

[DeviceA] port-isolate group 2

# Assign ports Ten-GigabitEthernet 1/0/2 and Ten-GigabitEthernet 1/0/3 to isolation group 1.

[DeviceA] interface ten-gigabitethernet 1/0/2

[DeviceA-Ten-GigabitEthernet1/0/2] port-isolate enable group 1

[DeviceA-Ten-GigabitEthernet1/0/2] quit

[DeviceA] interface ten-gigabitethernet 1/0/3

[DeviceA-Ten-GigabitEthernet1/0/3] port-isolate enable group 1

[DeviceA-Ten-GigabitEthernet1/0/3] quit

# Assign ports Ten-GigabitEthernet 1/0/4 and Ten-GigabitEthernet 1/0/5 to isolation group 2.

[DeviceA] interface ten-gigabitethernet 1/0/4

[DeviceA-Ten-GigabitEthernet1/0/4] port-isolate enable group 2

[DeviceA-Ten-GigabitEthernet1/0/4] quit

[DeviceA] interface ten-gigabitethernet 1/0/5

[DeviceA-Ten-GigabitEthernet1/0/5] port-isolate enable group 2

[DeviceA-Ten-GigabitEthernet1/0/5] quit

Verifying the configuration

# Display information about all isolation groups.

[DeviceA] display port-isolate group

 Port isolation group information:

 Group ID: 1

 Group members:

    Ten-GigabitEthernet1/0/2    Ten-GigabitEthernet1/0/3

Group ID: 2

 Group members:

    Ten-GigabitEthernet1/0/4    Ten-GigabitEthernet1/0/5

The output shows that:

·     Ports Ten-GigabitEthernet 1/0/2 and Ten-GigabitEthernet 1/0/3 are in isolation group 1. As a result, Host A and Host B are isolated from each other at Layer 2.

·     Ports Ten-GigabitEthernet 1/0/4 and Ten-GigabitEthernet 1/0/4 are in isolation group 2. As a result, Host C and Host D are isolated from each other at Layer 2.

Configuration files

#

 port-isolate group 1

 port-isolate group 2

#

vlan 2 to 3

#

interface Ten-GigabitEthernet1/0/1

 port link-mode bridge

 port link-type trunk

 port trunk permit vlan 1 to 3

#

interface Ten-GigabitEthernet1/0/2

 port link-mode bridge

 port access vlan 2

 port-isolate enable group 1

#

interface Ten-GigabitEthernet1/0/3

 port link-mode bridge

 port access vlan 2

 port-isolate enable group 1

#

interface Ten-GigabitEthernet1/0/4

 port link-mode bridge

 port access vlan 3

 port-isolate enable group 2

#

interface Ten-GigabitEthernet1/0/5

 port link-mode bridge

 port access vlan 3

 port-isolate enable group 2

#