Date: Fri, 13 Apr 2007 02:14:03 +0900 From: JINMEI Tatuya / =?ISO-2022-JP?B?GyRCP0BMQEMjOkgbKEI=?= <jinmei@isl.rdc.toshiba.co.jp> To: Andrew McDonald <andrew@mcdonald.org.uk> Cc: freebsd-net@freebsd.org Subject: Re: IPv6 Router Alert breaks forwarding Message-ID: <m1y7kxms6c.wl%jinmei@isl.rdc.toshiba.co.jp> In-Reply-To: <20070405152547.GC6798@mcdonald.org.uk> References: <20070404211815.GA6798@mcdonald.org.uk> <m1d52jpd5c.wl%jinmei@isl.rdc.toshiba.co.jp> <20070405081639.GB6798@mcdonald.org.uk> <m11wiyq5q5.wl%jinmei@isl.rdc.toshiba.co.jp> <20070405152547.GC6798@mcdonald.org.uk>
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At Thu, 5 Apr 2007 16:25:47 +0100, Andrew McDonald <andrew@mcdonald.org.uk> wrote: > > The behavior looks reasonable, but I'd code it more explicitly with > > some comments so that the intent is clear and others can correctly > > modify it for future extensions. A possible patch to implement it is > > pasted below. One thing I'm not really sure is whether someone is > > using (or has used) other predefined alert values: > > > > 1 Datagram contains RSVP message. > > 2 Datagram contains an Active Networks message. > > > > (I guess you're now going to use values 3-35 per RFC3175). > > > > If there is a user, we need to be careful not to break compatibility. > > That patch looks good to me. > > I think RSVP is the only other potential current user (and most likely > without RFC3175 support). There appears to be some basic support for > IPv6 in the ISI RSVPd implementation (untouched since 1999), but from a > quick look at the code it is not clear whether they actually use the > IPv6 router alert anyway. It predates RFC3175. If you want to be very > conservative in changing behaviour you might want to include RSVP, but > it seems unlikely that anyone is using it. > > The only reference I know of for the Active Networks use is a published > paper (and the reference in RFC2711). I don't know of any running code. Okay, if no one else objects to it, I'll commit the change. Thanks, JINMEI, Tatuya Communication Platform Lab. Corporate R&D Center, Toshiba Corp. jinmei@isl.rdc.toshiba.co.jp
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