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<p class="MsoNormal"><b><span style="font-size:12.0pt;color:black">From: </span></b><span style="font-size:12.0pt;color:black">Christian Svensson <bluecmd@google.com><br>
<b>Date: </b>Monday, September 16, 2019 at 5:33 AM<br>
<b>To: </b>Samuel Mendoza-Jonas <sam@mendozajonas.com><br>
<b>Cc: </b>Vijay Khemka <vijaykhemka@fb.com>, "David S. Miller" <davem@davemloft.net>, "netdev@vger.kernel.org" <netdev@vger.kernel.org>, "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>, "openbmc @ lists . ozlabs . org" <openbmc@lists.ozlabs.org>,
Joel Stanley <joel@jms.id.au>, "linux-aspeed@lists.ozlabs.org" <linux-aspeed@lists.ozlabs.org>, Sai Dasari <sdasari@fb.com><br>
<b>Subject: </b>Re: [PATCH] net/ncsi: Disable global multicast filter<o:p></o:p></span></p>
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<p class="MsoNormal">On Mon, Sep 16, 2019 at 4:39 AM Samuel Mendoza-Jonas <<a href="mailto:sam@mendozajonas.com">sam@mendozajonas.com</a>> wrote:<br>
><br>
> I'll have a look at the multicast issues, CC'ing in Chris too who IIRC<br>
> was looking at similar issues for u-bmc in case he got further.<br>
<br>
Thanks. I think this is very similar to the patch that u-bmc has, but this one is an actual nice-looking patch :-). The u-bmc one is just a bunch of #if 0's around multicast filtering.<o:p></o:p></p>
<p class="MsoNormal">Thanks Chris<o:p></o:p></p>
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<br>
What I'm worried about is that we forget why IPv6 works by disabling multicast filtering, I don't see any elaborate mention of this in the code. The long-term fix is to make sure the GMF is programmed with the correct multicast groups to make IPv6 happy, and
we shouldn't lose track of that I feel. However, as an intermediate fix I welcome this patch whole-heartedly.
<o:p></o:p></p>
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<p class="MsoNormal">Currently issues are with vender’s firmware. If we enable multicast filtering it filters IPV6 packets as well like RA, neighbor discovery etc. And by disabling it forward all packets including IPV6 to management controller.<o:p></o:p></p>
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<p class="MsoNormal">I will see if I can dig up an eval board to try it on and add a Tested-By in that case.<o:p></o:p></p>
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<p class="MsoNormal">Thanks Chris, I am looking forward to your test results.<o:p></o:p></p>
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<p class="MsoNormal">Thanks,<o:p></o:p></p>
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