using iproute2 for load balancing following problems are encountered:
1) when one interface/ISP is down packets that were routed to that interface are not rerouted to the other interface.
2) ip route add default scope global nexthop via $P1 dev $IF1 weight 1 nexthop via $P2 dev $IF2 weight 1
a) using this rule means both ISPs have equal priority,
b) which one will the kernel choose?
c) making the weight of one ISP higher means it has lower priority, right?
