Date: Thu, 16 Mar 2006 23:51:44 +0100 From: "Bart Van Kerckhove" <bart@it-ss.be> To: "Brad" <brad@comstyle.com>, "freebsd-net@FreeBSD.org" <freebsd-net@freebsd.org> Subject: Re: OT - Quagga/CARP Message-ID: <001601c6494c$32f188f0$020b000a@bartwrkstxp> References: <20060316193740.GE11850@spc.org><003701c64941$ac548540$020b000a@bartwrkstxp><20060316215207.GH11850@spc.org> <20060316222111.GD23644@blar.home.comstyle.com>
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Brad <brad@comstyle.com> wrote: > On Thu, Mar 16, 2006 at 09:52:07PM +0000, Bruce M Simpson wrote: >> On Thu, Mar 16, 2006 at 10:36:20PM +0100, Bart Van Kerckhove wrote: >>> ECMP was indeed one of the features i was looking for at that time, >>> which i found to be impossible. >>> I just don't like the idea of moving towards another platform just >>> for this reason, since I'm very happy with freebsd's performance. >>> There used to be a patch for ECMP, but it was a huge hack. very >>> dirty at best. >> >> itojun recently committed a set of ECMP related changes to OpenBSD. >> Unfortunately I have not had free time to review them in any detail. >> >> I hope andre@ is watching this thread, it's probably on his laundry >> list too. I believe other parties may have implemented the hack you >> are referring to. > > Heh. At first I read this and wasn't sure what ECMP was, I've never > seen anyone use that acronym before. Hmm, sorry if I used a non-common term there, it's the only abbreviation i know of ;> > The code Itojun commited to the > OpenBSD tree consisted of code to add multipath support for radix > trees. The routing code still needs to be modified to use this new > support though. > > > radix tree with multipath support. from kame. deraadt ok > user visible changes: > - you can add multiple routes with same key (route add A B then route > add A C) > - you have to specify gateway address if there are multiple entries > on the table (route delete A B, instead of route delete A) > kernel change: > - radix_node_head has an extra entry > - rnh_deladdr takes extra argument I have looked into KAME before, and was puzzled to see it was in KAME, but not in *bsd :-> > > TODO: > - actually take advantage of multipath (rtalloc -> rtalloc_mpath) > > > http://www.openbsd.org/cgi-bin/cvsweb/src/sys/net/radix.c > http://www.openbsd.org/cgi-bin/cvsweb/src/sys/net/radix_mpath.c I have no kernel coding experience whatsoever. How hard would it be to merge this with freebsd? -Bart
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