We have two SRX in packet mode. their are two ISP link connected on per gateway for redundancy.
ISP1 is connected on ge-0/0/0 interface and ISP2 is connected on ge-0/0/1 interface.
Here if ISP1(Primary) down ISP2(Secondary) interface should start communicate. once ISP1 interface come up that should again become primary.
Kindly suggest configuration KB.
You have 2 ISP connected to each SRX? If so you can use IP-Monitoring feature to failover traffic between the links.
If you are saying ISP1 is on SRX1 and ISP2 on SRX2, ignore this.