High Availability

High availability (HA) provides a way to minimize the potential for device failure within a network. Because all of your network traffic passes through a Juniper Networks security device, you need to remove as many points of failure as possible from your network by ensuring that the device has a backup in case it fails.

Setting up your security devices in HA pairs removes one potential point of failure from your network design. You can remove other potential points of failure by setting up redundant switches on either side of the HA pair of security devices. This chapter explains how to configure NSM NetScreen Redundancy Protocol (NSRP) clusters and describes how to use NSRP to support HA.

For detailed information on NSRP and HA, see the Concepts & Examples ScreenOS Reference Guide.

This chapter contains the following topics: