This article provides information about the support extended by SRX Branch series devices for Track-IP (IP Monitoring with route or interface failover).
Track-IP with IP Monitoring with route failover is available for SRX100, SRX110, SRX210, SRX220, SRX240, SRX550, and SRX650 platforms as of Junos OS Release 11.2.
Track-IP with IP Monitoring with interface enabling/disabling is available for SRX100, SRX110, SRX210, SRX220, SRX240, SRX550, and SRX650 platforms as of Junos OS Release 12.1X44.
For more information, see IP Monitoring .
A SLAX script is also available, which can be used to simulate the track-ip functionality. It allows for path and next-hop validation via the existing network infrastructure with the ICMP protocol. When a failure is detected, the script will execute a failover to the other node in an attempt to prevent downtime. For more information, see the following link:
http://techwiki.juniper.net/Automation_Scripting/030_Examples/Junos_Automation_Library/track-ip
http://www.juniper.net/techpubs/en_US/junos12.1x47/information-products/pathway-pages/config-guide-automation/index.html