Need to check BGP load balancing for per packet level for ISP traffic on SRX .
Here is a sample configuration for the BGP load balancing for the ISP traffic - user@R1# show protocols bgp { group external { type external; peer-as 64501; multipath; neighbor ISP 1; neighbor ISP 2; neighbor ISP 3, } } policy-statement lb { from { route-filter 0.0.0.0/0 exact; } then { load-balance per-packet; } } } static { route aaa.aaa.aaa.aaa discard; route bbb.bbb.bbb.bbb next-hop ccc.ccc.ccc.ccc; route ddd.ddd.ddd.ddd next-hop ddd.ddd.ddd.ddd; route eee.eee.eee.eee next-hop fff.fff.fff.fff; } forwarding-table { export lb; } }