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Chapter 3 Configuring the Device
20 User’s Guide
ESTABLISHING AN HA CONNECTION BETWEEN DEVICES
To assure continuous traffic flow in the event of system failure, you can cable and
configure two NetScreen devices in a redundant cluster. The devices propagate all
network, configuration and session information to each other. Should one device fail, the
other takes over the traffic processing.
The following diagram shows a typical HA setup for NetScreen-208 devices.
Note: For the NetScreen-204, the default HA interface is ethernet4. For the
NetScreen-208, the default HA interface is ethernet8. (Each is bound to the HA
security zone.)
RouterRouter
Layer-3 Switch 2Layer-3 Switch 1
To ethernet3To ethernet3
To ethernet2
To ethernet2
To ethernet8
To ethernet1
DMZ
DMZ LAN
Switch 4
Internet
To ethernet1
Device 1 Device 2
LAN
Switch 3