From mboxrd@z Thu Jan 1 00:00:00 1970 Message-ID: <4D65CD81.4070203@zytor.com> Date: Wed, 23 Feb 2011 19:16:17 -0800 From: "H. Peter Anvin" MIME-Version: 1.0 References: <1297811961-19249-1-git-send-email-linus.luessing@web.de> In-Reply-To: <1297811961-19249-1-git-send-email-linus.luessing@web.de> Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Subject: Re: [Bridge] Multicast snooping fixes and suggestions List-Id: Linux Ethernet Bridging List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: =?UTF-8?B?TGludXMgTMO8c3Npbmc=?= Cc: netdev@vger.kernel.org, bridge@lists.linux-foundation.org, linux-kernel@vger.kernel.org, Herbert Xu , "David S. Miller" On 02/15/2011 03:19 PM, Linus Lüssing wrote: > Hello everyone, > > While testing the (very awesome!) bridge igmp/mld snooping support I came across > two issues which are breaking IPv6 multicast snooping and IPv6 > non-link-local multicast on bridges with multicast snooping support enabled > in general. The first two patches shall fix these issues. > > The third one addresses a potential bug on little endian machines which I noticed > during this little code reviewing. This patch is untested though, feedback welcome. > > The fourth and fifth patch are a suggestion to also permit using the bridge multicast > snooping feature for link local multimedia multicast traffic. Therefore > using the transient multicast flag instead of the non-link-local scope criteria > seems to be a suitable solution at least for IPv6, in my opinion. Let me know what > you think about it. > Hello, I have just noticed that when using a Linux bridge, IPv6 often fails to configure until some considerable time has passed, presumably some kind of retry timer. The dmesg shows: [178292.449300] br0: port 1(eth0) entering learning state [178292.449304] br0: port 1(eth0) entering learning state [178302.536098] br0: no IPv6 routers present [178307.416139] br0: port 1(eth0) entering forwarding state ... even though there is a configured and active IPv6 router on the network. I have also seen some serious delays with DHCPv4 which presumably is due to lost packets during bridge learning. Are these packets likely to address that situation (or am I just plain doing something stupid)? -hpa -- H. Peter Anvin, Intel Open Source Technology Center I work for Intel. I don't speak on their behalf.