netdev - Re: [PATCH v2 net-next] ipv6: router reachability probing

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Message-Id: <20131211.160323.283336557694027073.davem@davemloft.net>
Date:	Wed, 11 Dec 2013 16:03:23 -0500 (EST)
From:	David Miller <davem@...emloft.net>
To:	hannes@...essinduktion.org
Cc:	jbenc@...hat.com, netdev@...r.kernel.org, yoshfuji@...ux-ipv6.org
Subject: Re: [PATCH v2 net-next] ipv6: router reachability probing

From: Hannes Frederic Sowa <hannes@...essinduktion.org>
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 <jbenc@...hat.com>
> 
> Acked-by: Hannes Frederic Sowa <hannes@...essinduktion.org>
> 
> Looks good, thanks!

Applied, thanks guys.
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