[dpdk-users] i40e VF PMD not getting multicast packets

Dey, Souvik sodey at rbbn.com
Mon Oct 15 21:27:10 CEST 2018


Moreover I wanted to mention one more thing, that the issue of multicast packets not working is only with DPDK 140eVF PMD. In case I use the i40evf of the kernel then it is working fine and I don’t see any issues with v6. So why is the trust mode a requirement for DPDK pmd ?

From: Dey, Souvik
Sent: Monday, October 15, 2018 2:52 PM
To: Ruinan <huruinan at gmail.com>
Cc: dev at dpdk.org; users at dpdk.org
Subject: RE: [dpdk-users] i40e VF PMD not getting multicast packets

No the trust mode is off currently on the host. I can try with trust mode on too. But I have a doubt, is trust mode mandatory to be turned on to make the VF receive v6 multicast packets ? if yes then how will this work in openstack (i40e VF dpdk) with v6 ?

--
Regards,
Souvik

From: Ruinan <huruinan at gmail.com<mailto:huruinan at gmail.com>>
Sent: Monday, October 15, 2018 2:33 PM
To: Dey, Souvik <sodey at rbbn.com<mailto:sodey at rbbn.com>>
Cc: dev at dpdk.org<mailto:dev at dpdk.org>; users at dpdk.org<mailto:users at dpdk.org>
Subject: Re: [dpdk-users] i40e VF PMD not getting multicast packets

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Hi,

Did you enable trust mode on vf? If trust is off on host, promiscuous can’t enabled from vm.

Ruinan Hu
ruinan.hu at casa-systems.com<mailto:ruinan.hu at casa-systems.com>
(857) 209-1955

> On Oct 15, 2018, at 14:26, Dey, Souvik <sodey at rbbn.com<mailto:sodey at rbbn.com>> wrote:
>
> Hi All,
> I am currently facing issues with getting the multicast IPv6 packets when using the i40evf pmd.
>
> I do see there is a limitation mentioned in the release notes of DPDK that
>
> 16.27. I40e VF may not receive packets in the promiscuous mode
> Description:
> Promiscuous mode is not supported by the DPDK i40e VF driver when using the i40e Linux kernel driver as host driver.
> Implication:
> The i40e VF does not receive packets when the destination MAC address is unknown.
> Resolution/Workaround:
> Use a explicit destination MAC address that matches the VF.
> Affected Environment/Platform:
> All.
> Driver/Module:
> Poll Mode Driver (PMD).
>
>
> Do this mean that multicast promiscuous mode is also not supported ? I am currently facing issues with receiving packets multicast packets for IPv6 which is making IPv6 to fail with i40evf pmd.
> I am currently using 17.11.2 DPDK with the Centos 7.5 and i40e 2.4.6 version on the host. I have the rte_eth_allmulticast_enable() also set for the port but still I see all multicast packets are not reaching the pmd.
> Also if promiscuous mode has to be turned off then how should we add multicast address to the PF from the VF ?
> --
> Regards,
> Souvik


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