Date: Fri, 25 Sep 2009 09:29:19 -0700 From: Julian Elischer <julian@elischer.org> To: John Hay <jhay@meraka.org.za> Cc: freebsd-net <freebsd-net@FreeBSD.org>, "Li, Qing" <qing.li@bluecoat.com>, freebsd-current@FreeBSD.org, Alexander Motin <mav@FreeBSD.org> Subject: Re: Point-to-Point interfaces regressions Message-ID: <4ABCEFDF.5020501@elischer.org> In-Reply-To: <20090925090104.GA99931@zibbi.meraka.csir.co.za> References: <4ABBAC87.4040306@FreeBSD.org> <B583FBF374231F4A89607B4D08578A430569985B@bcs-mail03.internal.cacheflow.com> <4ABBE5C6.6070707@FreeBSD.org> <B583FBF374231F4A89607B4D08578A43056998A4@bcs-mail03.internal.cacheflow.com> <4ABC6E7C.80305@FreeBSD.org> <B583FBF374231F4A89607B4D08578A4305699AA6@bcs-mail03.internal.cacheflow.com> <20090925090104.GA99931@zibbi.meraka.csir.co.za>
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John Hay wrote: > On Fri, Sep 25, 2009 at 12:27:04AM -0700, Li, Qing wrote: >>> Li, Qing wrote: >>>>> Me and many other people running net/mpd handling thousands of PtP >>>>> interfaces sharing local addresses with each other and with some >>>>> Ethernet interface. This change makes such setup inoperable, as mpd >>>>> will constantly receive errors while trying to set addresses and >>>>> drop connections. >>>> I can revert to the old behavior. I asked for feedback and >> received >>>> none at the time ... >>> I would like to see it working, but working correctly. If it is not >>> possible to implement it correctly - then reverted, or at least >>> disabled >>> by default. >>> >> Asking for compatibility is reasonable but the existing packet >> leaking behavior is incorrect. >> >> After reviewing the previous thread on this topic back in July, >> I see that Henri Hennebert requested this feature for IPv6. >> >> I intend to introduce a sysctl variable to control whether loopback >> route should be installed for the local end point. By default >> the old behavior maintained. > > What about only adding the route if it does not exist yet? That should > handle the common case of reusing your ip address on the ethernet > interface on the local side of point-to-point links. the hard part is removing it if it is the last interface that uses it. > > John
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