From mboxrd@z Thu Jan 1 00:00:00 1970 From: Julian Anastasov Date: Mon, 08 Jul 2002 12:15:38 +0000 Subject: Re: [LARTC] "Bug" in howto 4.2.1 Split access and other advice Message-Id: List-Id: References: In-Reply-To: MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit To: lartc@vger.kernel.org Hello, On Mon, 8 Jul 2002, Ard van Breemen wrote: > > Or more correctly, to specify the path between > > each two subnets, the more specific rules and routes before the > > others. > Yes... I like. Although too complex for the users that do not > know what we are talking about. Yes, I usually can't write good docs for the user's eyes :) > > Yes, equalize does not work if the ISPs filter by src. > > This flag is simply not in the kernel, only in user space. > Well, it *does* work in this framework: we only need the > multipath code to select a route, and therefore a source ip. Once > we got the source ip, we will not hit the multipath route > anymore due to the rules... And even if we did, there is a good > chance it is still cached :). Yes, the route cache is the only place that remembers these associations. But it is dangerous for the NAT conns, one IP added and some of the connections can die selecting wrong src IP after the cache is autoflushed. > > This snafu is also fixed in 2.4.19pre8, it is even killed: > > the multipath route is deleted due to SMP locking problems. > Do you mean we cannot have multipaths anymore? Or that the fix > was to remove the multipath route? Yes, the kernel removes the whole multipath route if one device from a path is unregistered. Even without such action from the kernel, the user is obligated to delete this multipath route because if we register the same device name, the nexthop will not switch from dead to alive. So, for 2.4 (I'm not sure how the behaviour will change in 2.5 later) the kernel removes the multipaths but note that we (the users) always have to recreate the multipath routes with unregistered devices. Regards -- Julian Anastasov _______________________________________________ LARTC mailing list / LARTC@mailman.ds9a.nl http://mailman.ds9a.nl/mailman/listinfo/lartc HOWTO: http://lartc.org/