[DPDK/ethdev Bug 1926] QinQ strip not working on XL710

[bugzilla@dpdk.org]

http://bugs.dpdk.org/show_bug.cgi?id=1926

            Bug ID: 1926
           Summary: QinQ strip not working on XL710
           Product: DPDK
           Version: unspecified
          Hardware: All
                OS: All
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: ethdev
          Assignee: dev@dpdk.org
          Reporter: dmarx@iol.unh.edu
  Target Milestone: ---

Packets with a single 88a8 tag, and packets with 88a8 and 8100 tags, are not
affected with qinq strip enabled:

testpmd> vlan set qinq_strip on 0
testpmd> vlan set strip on 0

Sent Dot1AD: Ether(src='40:a6:b7:22:b0:18',
dst='3c:fd:fe:c8:1a:a8')/Dot1AD()/IP(src='192.168.100.3',
dst='192.168.101.3')/UDP(sport=4321, dport=1234)/Raw(load=b'xxxxx')

Received: Ether / Dot1AD / IP / UDP 192.168.100.3:4321 > 192.168.101.3:1234 /
Raw / Padding

Sent QinQ: Ether(src='40:a6:b7:22:b0:18',
dst='3c:fd:fe:c8:1a:a8')/Dot1AD()/Dot1Q()/IP(src='192.168.100.3',
dst='192.168.101.3')/UDP(sport=4321, dport=1234)/Raw(load=b'xxxxx')

Received: Ether / Dot1AD / Dot1Q / IP / UDP 192.168.100.3:4321 >
192.168.101.3:1234 / Raw / Padding

It seems a previous ticket was closed a few years ago without resolution, which
outlined the same problem: https://bugs.dpdk.org/show_bug.cgi?id=1122

sudo ethtool -i enp181s0f0np0
driver: i40e
version: 6.8.0-106-generic
firmware-version: 9.55 0x8000fe31 1.3862.0
expansion-rom-version: 
bus-info: 0000:b5:00.0
supports-statistics: yes
supports-test: yes
supports-eeprom-access: yes
supports-register-dump: yes
supports-priv-flags: yes

uname -m
x86_64

DPDK version: 26.03 rc2

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