"People have a tendency to tinker with traffic, even when they
aren’t suffering from under-provisioned bandwidth. In OSPF,
you cannot really influence the way traffic is routed, aside from
adjusting a path’s metric. Some routers support making
changes to weights, but this isn’t usually necessary. OSPF
generally takes care of assigning weights, based on the speed of
the interfaces on a router. You can also use ECMP (equal cost
multipath) with OSPF, if you have two links to the same place and
wish to load balance in a round-robin fashion. Don’t try
tinkering with OSPF parameters; more likely than not, if you think
you have a problem it’s a network design issue, and fixing
that will accomplish your goals."
