From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Miller Subject: Re: [PATCH v2 net-next] ipv6: router reachability probing Date: Wed, 11 Dec 2013 16:03:23 -0500 (EST) Message-ID: <20131211.160323.283336557694027073.davem@davemloft.net> References: <20131211191023.GA4675@order.stressinduktion.org> Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit Cc: jbenc@redhat.com, netdev@vger.kernel.org, yoshfuji@linux-ipv6.org To: hannes@stressinduktion.org Return-path: Received: from shards.monkeyblade.net ([149.20.54.216]:59535 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751287Ab3LKVD0 (ORCPT ); Wed, 11 Dec 2013 16:03:26 -0500 In-Reply-To: <20131211191023.GA4675@order.stressinduktion.org> Sender: netdev-owner@vger.kernel.org List-ID: From: Hannes Frederic Sowa Date: Wed, 11 Dec 2013 20:10:23 +0100 > On Wed, Dec 11, 2013 at 01:48:20PM +0100, Jiri Benc wrote: >> RFC 4191 states in 3.5: >> >> When a host avoids using any non-reachable router X and instead sends >> a data packet to another router Y, and the host would have used >> router X if router X were reachable, then the host SHOULD probe each >> such router X's reachability by sending a single Neighbor >> Solicitation to that router's address. A host MUST NOT probe a >> router's reachability in the absence of useful traffic that the host >> would have sent to the router if it were reachable. In any case, >> these probes MUST be rate-limited to no more than one per minute per >> router. >> >> Currently, when the neighbour corresponding to a router falls into >> NUD_FAILED, it's never considered again. Introduce a new rt6_nud_state >> value, RT6_NUD_FAIL_PROBE, which suggests the route should not be used but >> should be probed with a single NS. The probe is ratelimited by the existing >> code. To better distinguish meanings of the failure values, rename >> RT6_NUD_FAIL_SOFT to RT6_NUD_FAIL_DO_RR. >> >> Signed-off-by: Jiri Benc > > Acked-by: Hannes Frederic Sowa > > Looks good, thanks! Applied, thanks guys.