I have implemented a dual-WAN with failover on my SRX, and am using routing instance to separate the default router for each WAN link.
The goal is to failover from WAN 1 to WAN 2 when IP monitoring fails, and push the WAN 2 default route to default routing instance.
Since I have implemented this routing instances however, I am no longer able to poll the SRX via SNMP from an offsite server.
Attached are my config, and trace file.