Re: [dpdk-users] How does Intel I350 support RSS for double VLAN (QinQ)?

[Alex Zhang <cingular.alex@gmail.com>]

> Hi,
>
> Does anyone know how to support the RSS for receiving packets with double
> VLAN or QinQ vlan (0x88A8), for I350 NIC card?
> In the I350 datasheet, it is mentioned:
>
> 7.4.5
> A packet is defined as a VLAN/802.1q packet if its type field matches the
> VET.
> Double VLAN Support
> The I350 supports a mode where most of the received and sent packet have
> at least one VLAN tag in
> addition to the regular tagging which might optionally be added. This mode
> is used for systems where
> the switches add an additional tag containing switching information.
> Note:
> The only packets that may not have the additional VLAN are local packets
> that will not have
> any VLAN tag.
> This mode is activated by setting CTRL_EXT.EXT_VLAN bit. The default value
> of this bit is set according
> to the EXT_VLAN (bit 1) in the Initialization Control 3 EEPROM word for
> ports 0 to 3. See Section 6.2.26
> for more information.
> The type of the VLAN tag used for the additional VLAN is defined in the
> VET.VET_EXT field.
>
> Based on above, I can use the
> rte_eth_dev_set_vlan_offload(port_id, ETH_VLAN_EXTEND_OFFLOAD)
> and
> rte_eth_dev_set_vlan_ether_type(port_id, ETH_VLAN_TYPE_OUTER, 0x88A8)
> to set the vlan extend offload and the corresponding eth type successfully.
>
> But the RSS still does not work for QinQ traffic.
>
> Can anyone have some input?
>
> Thanks,
>


-- 

Alex,