-----Original Message-----
From: Skidmore, Donald C [mailto:donald.c.skidmore@intel.com]
Sent: Saturday, March 29, 2014 5:54 AM
To: Komatsubara Madoka(小松原 円); linux-kernel@vger.kernel.org;
e1000-devel@lists.sourceforge.net; netdev@vger.kernel.org
Cc: Shimamoto Hiroshi(島本 裕志); Baba Hiroshi(馬場 裕司)
Subject: RE: Unable to receive multicast packet on VF

quoted

-----Original Message-----
From: Madoka Komatsubara [mailto:m-komatsubara@ab.jp.nec.com]
Sent: Friday, March 28, 2014 4:49 AM
To: linux-kernel@vger.kernel.org; e1000-devel@lists.sourceforge.net;
netdev@vger.kernel.org
Cc: Hiroshi Shimamoto; Hiroshi Baba
Subject: [E1000-devel] Unable to receive multicast packet on VF

Hi all,


We would like to use multicast packet on the guest with Intel 82599EB
SR- IOV.
However, the document says that adding the multicast MAC address to
the VF is allowed during PF initialization only. (Please refer to the
URL below.) It means that we couldn't handle dynamically allocated multicast

address.

quoted

On the other hand,

quoted

From the data sheet, 82599EB has Multicast Promiscuous mode.

We could enable it on PF and all multicast packets are delivered to every

VF.

quoted

That doesn't seem good, because each guest has to handle unnecessary
packet.

Isn't it good to have a feature to add specific multicast address to VF?
Does anyone know that issue or the solution?



<http://www.intel.com/content/dam/www/public/us/en/documents/datas
heets/82599-10-gbe-controller-datasheet.pdf>
 page585
 section 8.2.3.7.7
 "This table should be initialized by software before transmit and
receive are enabled."

Regards,
Madoka Komatsubara

Hi Madoka,

You can see where we are changing the multicast address list in the VF driver
in ixgbevf_set_rx_mode().  This not only called via ndo_set_rx_mode but in
our up and open calls.   So while it is true this needs to be initialized before
transmit and receive are enabled, the value can be changed without requiring
the module to be reloaded.

Hope that helps,
-Don

Hi Donald,

Thank you for your information.
it is currently under consideration.
I will contact you again later.


Regards,
Madoka Komatsubara