How to Configure an Redundant Interface

Below shows you how to configure redundant interfaces on a Netscreen firewall. In the example below all traffic will be passed over eth1, and in event of the link failing traffic will be sent across eth2.

ns5gt-> set interface redundant1 zone inside
ns5gt-> set interface redundant1 ip 10.1.1.20/24
ns5gt-> set interface ethernet1 group redundant1
ns5gt-> set interface ethernet2 group redundant1

How to Change an Interface to Primary 

In order to change the Primary Interface to eth2 enter the following commands

ns5gt-> set interface redundant1 phy primary ethernet2