From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH v2 net-next 0/3] ipv4: Hash-based multipath routing Date: Sat, 29 Aug 2015 13:46:28 -0700 (PDT) Message-ID: <20150829.134628.1013990034021542524.davem@davemloft.net> References: <1440792050-2109-1-git-send-email-pch@ordbogen.com> <20150829.131429.360433621593751136.davem@davemloft.net> <20150829223115.523553db@tyr> Mime-Version: 1.0 Content-Type: Text/Plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Return-path: In-Reply-To: <20150829223115.523553db@tyr> Sender: linux-api-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: pch-chEQUL3jiZBWk0Htik3J/w@public.gmane.org Cc: netdev-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, kuznet-v/Mj1YrvjDBInbfyfbPRSQ@public.gmane.org, jmorris-gx6/JNMH7DfYtjvyW6yDsg@public.gmane.org, yoshfuji-VfPWfsRibaP+Ru+s062T9g@public.gmane.org, kaber-dcUjhNyLwpNeoWH0uzbU5w@public.gmane.org, linux-api-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, roopa-qUQiAmfTcIp+XZJcv9eMoEEOCMrvLtNR@public.gmane.org, sfeldma-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, ebiederm-aS9lmoZGLiVWk0Htik3J/w@public.gmane.org, nicolas.dichtel-pdR9zngts4EAvxtiuMwx3w@public.gmane.org, tgraf-G/eBtMaohhA@public.gmane.org, jbenc-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org List-Id: linux-api@vger.kernel.org =46rom: Peter N=F8rlund Date: Sat, 29 Aug 2015 22:31:15 +0200 > On Sat, 29 Aug 2015 13:14:29 -0700 (PDT) > David Miller wrote: >=20 >> From: pch-chEQUL3jiZBWk0Htik3J/w@public.gmane.org >> Date: Fri, 28 Aug 2015 22:00:47 +0200 >>=20 >> > When the routing cache was removed in 3.6, the IPv4 multipath >> > algorithm changed from more or less being destination-based into >> > being quasi-random per-packet scheduling. This increases the risk >> > of out-of-order packets and makes it impossible to use multipath >> > together with anycast services. >>=20 >> Don't even try to be fancy. >>=20 >> Simply kill the round-robin stuff off completely, and make hash base= d >> routing the one and only mode, no special configuration stuff >> necessary. >=20 > I like the sound of that! Just to be clear - are you telling me to > stick with L3 and skip the L4 part? =46or now it seems best to just do L3 and make ipv4 and ipv6 behave the same.