The second question is how to balance traffic going out over the twoproviders.
This is actually not hard if you already have set up split accessas above.
Instead of choosing one of the two providers as your default route, you nowset up the default route to be a multipath route. In the default kernel thiswill balance routes over the two providers.
It is done as follows (once morebuilding on the example in the section on split-access):
ip route add default scope global nexthop via $P1 dev $IF1 weight 1 \
nexthop via $P2 dev $IF2 weight 1
This will balance the routes over both providers.
The weight parameters canbe tweaked to favor one provider over the other.
Note that balancing will not be perfect, as it is route based, and routes are cached.
This means that routes to often-used sites will always be over the same provider.
Furthermore, if you really want to do this, you probably also want to look at Julian Anastasov's patches at
http://www.ssi.bg/~ja/#routes , Julian's route patch page. They will make things nicer to work with
I find a webpage with the words above...
Is it will be OK....