Hello,

> > Why is this (having a route pointing to a gateway that's not on net
> > for any interface) not supported, even if there is a route for this
> > gateway pointing at another gateway which is on-net?
> 
> My guess is, because it does not match IP's routing model, so whoever

Well, it seems to match the routing model of source routing, but I would
like to know for sure, as I'm not very familiar with source routing.

> > I. e. could the routing table be searched recursively, until a
> > directly-reachable gateway is found?
> 
> It could.  But quite aside from what it does to the assumptions

What does it do to the assumptions underlying IP concretely?

> underlying IP, how would you cut off infinite loops?

By specifying a maximum loop count, as it is with symlinks.

Isn't the Source Routing option (for IPv4) limited in size? There would 
be no point in having more loops than this limit.

Thanks	Pavel