[Reaper]

Those are linux ip rule commands:

"ip rule add from 10.0.0.10 table ISP A"

stands for:

for all traffic originating from 10.0.0.10, use routing table named ISP A.

then there is added routing entry into ISP A routing table:
ip route add default via 194.162.56.1 dev eth2 table ISP A

You can view the ISP A routing table:
ip route ls table ISP A

Btw, with "ip rule ls" you can view the order of routing tables:
0: from all lookup local
32765: from 10.0.0.10 lookup ISP A
32766: from all lookup main
32767: from all lookup default

if traffic sould not be matched in table "ISP A" then the next rule is taken... One can set up quite complicated linux routings that way.