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(usagi-users 04099) Re: Default Router Preference - RFC4191, default route switching
- To: Linus LÃssing <linus.luessing@xxxxxx>
- Subject: (usagi-users 04099) Re: Default Router Preference - RFC4191, default route switching
- From: arno@xxxxxxxxxxxx (Arnaud Ebalard)
- Date: Wed, 07 Jul 2010 17:49:07 +0200
- Cc: usagi-users@xxxxxxxxxxxxxxxxx
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- In-reply-to: <20100701230846.GA3783@Sellars> ("Linus LÃssing"'s message of "Fri, 2 Jul 2010 01:08:46 +0200")
- References: <20100610155436.GA5116@Sellars> <87hbkm54q8.fsf@xxxxxxxxxxxxxx> <20100701230846.GA3783@Sellars>
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Linus LÃssing <linus.luessing@xxxxxx> writes:
> Cool! I now did some new tests with a custom-build 188.8.131.52
> kernel. It seems to work a little better, in that it now also
> switched the default route. The new netcat session goes over the
> right prefix and to the right router with the high preference.
> However, there still seems something wrong: The old netcat
> connection still uses the old prefix (which is good, otherwise I'd
> lose the connection, of course), but new packets take the
> high-preference default route immediately - which is going to fail
> if the gateway routers / the ISPs behind them do strict subnet
Yes. I would have to reread the RFC (4861, 4191, 2461, 4863, ...?) to
check what the expected behavior is: IIRC, the prefix is associated with
the subnet (the link) and not the router. If I am right, the behaviour
you get makes sense.
> And just for clarification, a route ::/0 with the same preference
> is probably superfluous, right (though I tested both with the same
I implemented that a long time ago in UMIP and do not remember what the
kernel maintains, i.e. one or two routes.
> The gateway is running a 2.6.32 kernel by the way.
That's a good version (stable and maintained).