CDRouter Support

An Ethernet switch with 802.1x port based authentication

knowledge-base version 10.4

Overview

CDRouter’s support for bridge mode now makes it possible to test basic Ethernet switching devices, including those that implement 802 .1x for port based authentication. A detailed discussion of testing 802.1x enabled devices with CDRouter can be found in this Testing Guide. Although this Application Note is specific to 802.1x in gateway devices, many of the principles are applicable to devices operating in bridge mode as well.

Test Setup

In the example below the DUT is a managed 8-port Ethernet switch that has ports 1 and 8 in a separate VLAN. Port 8 on the switch is configured with VLAN ID 100 (tagged) and 802.1x port based authentication. Port 8 is connected to CDRouter’s LAN (eth2) while port 1 (also tagged with VLAN 100) is connected to CDRouter’s WAN (eth1). Using this setup CDRouter is capable of testing not only the basic forwarding functionality the DUT, but also the DUT’s 802.1x authenticator functionality. A simple CDRouter configuration based on the following assumptions is provided below.

  • Management interface IPv4 address: DHCP
  • Management interface IPv6 address: DHCPv6
  • Wireless mode: not supported
  • Wireless security: not supported
  • TR-069 support: no
  • 802.1x support: yes, port 8
  • VLANs: yes, ports 1 and 8 tagged with VLAN ID 100

CDRouter Configuration

# Enable forwarding mode within CDRouter
testvar forwardingMode        bridge

# LAN IPv4 configuration
testvar lanInterface          eth2
testvar lanType               ethernet
testvar dhcpClientStart       192.168.1.2
testvar dhcpClientEnd         192.168.1.7 

# VLAN configuration
testvar lanVlanId             100
testvar lanVlanPriority       1
testvar wanVlanId             100
testvar wanVlanPriority       1

# WAN IPv4 configuration
testvar wanInterface          eth1
testvar wanMode               DHCP
testvar wanIspIp              192.168.1.1
testvar wanIspAssignIp        192.168.1.50

# IPv6 configuration
testvar supportsIPv6          yes
testvar ipv6WanMode           DHCP
testvar ipv6WanIspIp          3001::1
testvar ipv6WanIspAssignIp    3001::2
testvar ipv6WanIspPrefixLen   64

# 802.1x configuration
testvar wanRadiusEnable       yes
testvar wanRadiusIp           3.3.3.44
testvar wanRadiusSecret       qacafe123
# See Application Note on 802.1x testing for more information
# on the configuration EAP identities

Requirements

  • CDRouter or CDRouter Multiport
  • CDRouter IPv6 (optional, if IPv6 testing is required)
  • CDRouter TR-069 (optional, if the DUT supports TR-069)
  • Two dedicated Ethernet network interfaces
  • One Ethernet switch

Benefits

  • Allows testing of Ethernet switches with CDRouter
  • Can be used to verify 802.1x functionality of Ethernet switch
  • Great for verifying that Ethernet switch forwards IPv4 and IPv6 traffic properly
  • Can be used to verify VLAN capabilities of Ethernet switch

Additional Information

Please see this Testing Guide for more information on bridge mode testing with CDRouter.

A detailed discussion of testing 802.1x enabled devices with CDRouter can be found in this Testing Guide.

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