International & Local routing

[@udiS3]

Okay so there are a bunch of excellent thread on MyBB on how to add static routes to a second ppp interface on linux-ish routers.

Question:

What about the possibility for creating default routes for both ppp0 & ppp1 but with different metrics?

Having the local account as the one with the lowest metric will make it preferred. And if a route cannot be found with this then the default route of the international account will be used?

If this works then the static routes wont have to be maintained i.e. a new local IP network is listed.

 

[froot]

It's a lot easier having a set of static routes for local sites and having a default route for the rest (international). It will keep the routing table a lot smaller.

 

[Locality]

Without going too much into the technicalities, I'd say overhead would be the biggest stumbling block — at least from a router based environment.

Another aspect to consider entirely is that certain local-only accounts offer intermittent international access, which negates the validity of each route as a potential false-positive.

 

[@udiS3]

It's a lot easier having a set of static routes for local sites and having a default route for the rest (international). It will keep the routing table a lot smaller.

Yeah but the maintainence of those static routes is the concern.
Also I dont see how the routing table is bigger as there are now
only:

Two default routes with different metrics vs
80+ static routes and a default route.

The only disadvantage i can think of is that this might introduce some
delay as a local default route is tried for an international address before
the default route with a higher metric is used.

 

[@udiS3]

Without going too much into the technicalities, I'd say overhead would be the biggest stumbling block — at least from a router based environment.

Another aspect to consider entirely is that certain local-only accounts offer intermittent international access, which negates the validity of each route as a potential false-positive.

Hmmmm.... Good point!