ZyWALL User's Guide

Chapter 6 Tutorials

ZyWALL USG 100/200 Series User’s Guide

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An Ethernet switch connects both ZyWALLs’ lan1 interfaces to LAN1. Whichever ZyWALL

is functioning as the master uses the default gateway IP address of the LAN1 computers

(192.168.1.1) for its lan1 interface and the static public IP address (1.1.1.1) for its wan1

interface. If ZyWALL A recovers (has both its lan1 and wan1 interfaces connected), it

resumes its role as the master and takes over all of its functions again.

Figure 115 Device HA: Master Fails and Backup Takes Over

Each ZyWALL also has a separate management IP address that stays the same whether the

ZyWALL functions as the master or a backup. ZyWALL A’s management IP address is

192.168.1.3 and ZyWALL B’s is 192.168.1.5.

Figure 116 Device HA: Management IP Addresses

6.9.1 Before You Start

ZyWALL A should already be configured. You will use device HA to copy ZyWALL A’s

settings to B later (in Section 6.9.3 on page 165). To avoid an IP address conflict, do not

connect ZyWALL B to the LAN1 subnet until after you configure its device HA settings and

the instructions tell you to deploy it (in Section 6.9.4 on page 166).

6.9.2 How to Configure Device HA on the Master ZyWALL

1 Log into ZyWALL A (the master ) and click Device HA > Active-Passive Mode. Click

lan1’s Edit icon.

192.168.1.1

LAN1

192.168.1.1

1.1.1.1

LAN1

192.168.1.3

192.168.1.5