set firewall filter PBR term 1 from source-address 192.168.45.50/32
set firewall filter PBR term 1 then routing-instance P2P
set firewall filter PBR term 2 then accept

set routing-instances P2P instance-type forwarding
set routing-instances P2P routing-options static route 0.0.0.0/0 next-hop 10.3.10.1

set routing-options interface-routes rib-group inet P2P
set routing-options rib-groups P2P import-rib [inet.0 P2P.inet.0]

set interfaces irb unit 45 family inet filter input PBR
set interfaces irb unit 310 family inet filter input PBR