Date: Fri, 04 May 2001 20:59:34 +0900
From: [EMAIL PROTECTED]
Message-ID: <[EMAIL PROTECTED]>
| suppose you have heard RAs from multiple interfaces. there's no
| guidelines for us to pick which interface from them, for the
| installation of default route.
Any time that can rationally be automated, it should make no real
difference (I'd tend to be kind of pragmatic and choose the interface
with the RA of best preference, on the assumption than in this environment
the RA preferences will be configured alike over all nets - even though it
is normally something that is local to a link).
But things should work whatever interface is chosen, pick a router, any
router (which is able to be picked as a default anyway), and packets should
be delivered. Perhaps not optimally, but delivered.
In the environments where that isn't true, it shouldn't matter what the
kernel thinks is a good default route, as someone is going to have to
tell the kernel what it should be using via a "route add". That is, if
you have multiple routers each advertising itself as being capable of
routing to default (or being a candidate as the default router), and they
can't find each other, then something is really stuffed...
| so i personally feel multi-interface autoconfigured host needs more
| work in specification side.
That is very probably true - multi-homing (in all its aspects) has tended
to be one of those "we'll figure that out later" problems...
| of course, we can have some configuration
| variable in implementation and prefer one of the outgoing interface,
Perhaps - though if something is to be configurable, it may as well
just be the default router itself I think. After all, if the best
default router is not available for some reason, why would one assume
that the second best router to use is going to be out the same interface?
kre
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