Date: Sun, 12 Sep 2021 12:41:52 +0300 From: Andriy Gapon <avg@FreeBSD.org> To: mike tancsa <mike@sentex.net>, FreeBSD-STABLE Mailing List <freebsd-stable@freebsd.org> Subject: Re: routing changes from Sept 7th and possible ppp breakage (RELENG_13) Message-ID: <67010baa-ecb4-7b9b-a797-efb3e2940fbb@FreeBSD.org> In-Reply-To: <c1cd5310-c241-6b7a-b81a-33e29648fa82@sentex.net>
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On 10/09/2021 00:38, mike tancsa wrote: > On our standard nanobsd router image we use, I noticed failover routing > broke all of a sudden. We are not using multiple FIBs, but somehow we > now have two default routes I am guessing because of multipath. (Note, > we just started testing RELENG_13 so its possible I am making bad > assumptions somewhere.) > > default 10.255.255.1 UGS 6 1500 igb0 > default 10.1.0.1 UGS 17 1500 tun10 > > I am pretty sure from the code base from 3+ days ago, I would not see > this condition. I just want to add that I've been seeing the same behavior on CURRENT for a few months now. I think that ppp probably needs some sort of an update to be aware of multipath. BTW, net@ may be a good mailing list to discuss this as well. > In the past, my nano image would get a default route via DHCP. If that > path was not functional or blocked, my monitoring software would detect > the failure and fire up PPP which has > > add! default HISADDR > > That now seems to add a second default route instead of getting rid of > the old one. > > if I add net.route.multipath=0 > > I get back the old behaviour > > According to the ppp docs > > If the add! command is used (note the trailing "!"), then if the > route already exists, it will be updated as with the `route change' > command (see route(8) for further details). > > Where as now, it doesnt seem to replace it, it seems to just add another > default route. > > For my purposes, setting net.route.multipath=0 seems to work just fine, > but I wonder if this warrants a note in ppp's docs since it no longer > seems to work that way in RELENG_13 ? -- Andriy Gaponhome | help
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