So layering on some fault tolerance at point of,
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set action-group test next-interface ethernet0/2 next-hop 1.1.1.2 action-entry 1
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so I can essentially define two next hops in the PBR configuration, and have an ICMP heartbeat to failover between the two next hops.
Similar to employing this http://kb.juniper.net/InfoCenter/index?page=content&id=KB9309 like it has shown for NSRP.