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Message-ID: <20081111133108.GA7124@clipper.ens.fr>
Date: Tue, 11 Nov 2008 14:31:08 +0100
From: David Madore <david.madore@....fr>
To: Linux Kernel Mailing-List <linux-kernel@...r.kernel.org>,
Linux NetDev Mailing-List <netdev@...r.kernel.org>,
atl1-devel@...ts.sourceforge.net
Subject: atl1e Ethernet driver not seeing packets sent to 33:33:00:00:00:01 multicast
Hi,
This is on Ubuntu 8.10 "Intrepid Ibex" using its stock kernel
(2.6.27-7.16), with an Eee PC 901 whose Ethernet adapter is (according
to lspci):
04:00.0 Ethernet controller: Attansic Technology Corp. L1 Gigabit Ethernet Adapter (rev b0)
using driver atl1e of said kernel.
_Unless_ the network device is put in promiscuous mode (e.g., by
running tcpdump), it does not see packets sent to Ethernet multicast
address 33:33:00:00:00:01. E.g., IPv6 packets to ff02::1
(ip6-allnodes) are not seen.
Practical consequence: IPv6 is broken, because router advertisements
are not received.
("ip maddr show" does give "link 33:33:00:00:00:01" among the
subscribed multicast addresses, so it's not a config problem.)
Is this a known problem? Is there a patch fixing it?
Until then, a workaround is to put the device in promiscuous mode.
Happy hacking,
--
David A. Madore
(david.madore@....fr,
http://www.madore.org/~david/ )
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