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From: Pekka Savola <pekkas@netcore.fi>
To: "Alejandro Riveira Fernández" <ariveira@gmail.com>
Cc: Todd Hayton <todd.hayton@gmail.com>,
	linux-kernel@vger.kernel.org, netdev@vger.kernel.org
Subject: Re: IPv6 multicast forwarding
Date: Fri, 24 Oct 2008 13:12:29 +0300 (EEST)	[thread overview]
Message-ID: <alpine.LRH.2.00.0810241307360.1106@netcore.fi> (raw)
In-Reply-To: <20081024111044.74c15155@varda>

[-- Attachment #1: Type: TEXT/PLAIN, Size: 1070 bytes --]

On Fri, 24 Oct 2008, Alejandro Riveira Fernández wrote:
>> Let me apologize in advance for the length of this message - it is long!
>>
>> I'm trying to test out IPv6 multicast forwarding on a 2.6.26 kernel
>> and I'm getting some strange values for the upcall messages from the
>> kernel. My code is below, but to give an overview, my setup is as
>> follows:
>>
>>     sender ------ ff15::1 -----> [eth1] linux 2.6.26 [eth0] ------> ...

Maybe this isn't the bug you're looking for but you shouldn't be using 
ff1x multicast addresses in a test like this; ff1x means that the 
multicast group is of "interface-local scope" and it isn't useful for 
multicast forwarding.  So the kernel might be correct in not 
installing multicast forwarding state for a group address like this 
(but if it's a conscious decision, maybe the failure mode should be 
better).  See S 2.7 of RFC4291.

-- 
Pekka Savola                 "You each name yourselves king, yet the
Netcore Oy                    kingdom bleeds."
Systems. Networks. Security. -- George R.R. Martin: A Clash of Kings

  reply	other threads:[~2008-10-24 10:12 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-10-23 22:11 Todd Hayton
2008-10-24  9:10 ` Alejandro Riveira Fernández
2008-10-24 10:12   ` Pekka Savola [this message]
2008-10-24 13:06     ` Todd Hayton
2008-10-26 10:26       ` Pekka Savola
  -- strict thread matches above, loose matches on Subject: below --
2003-07-25 12:04 ipv6 " Youngmin Kim

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