[dpdk-users] DPDK support for vlan id 0

[Muhammad Zain-ul-Abideen]

Kindly tell us more about the setup and which dpdk you are using. and what
is the packet life at sender and receiver.




On Mon, May 17, 2021 at 1:01 PM Jagan P <jagan2.p at altran.com> wrote:

> Hi,
> We were trying to forward packets with vlan id as 0. But the packet is
> getting altered when we do so.
> The IP flag and the destination port fields are getting changed. We doubt
> if this is happening in DPDK because till the rte_eth_tx_burst API, the
> packet is proper.
> But the packet captured at the destination is altered.
> Could you please let us know if there is support in DPDK for forwarding
> packet with vlan id 0 or if we are missing something.
>
> Packet at rte_eth_tx_burst:
> dump mbuf at 0x1706dad00, iova=0x1706dad80, buf_len=2304
>   pkt_len=252, ol_flags=0xf0000000000181, nb_segs=1, port=0, vlan_tci=0,
> ptype=0x211
>   segment at 0x1706dad00, data=0x1706dae04, len=252, off=132, refcnt=1
>   Dump data at [0x1706dae04], len=200
> 00000000: 00 10 94 00 00 05 00 01 02 03 04 05 81 00 00 00 |
> ................
> 00000010: 08 00 45 00 00 EA 00 02 00 00 3F 11 00 00 02 02 |
> ..E.......?.....
> 00000020: 02 02 05 05 05 02 62 A4 62 A3 00 D6 0E F2 00 00 |
> ......b.b.......
> 00000030: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |
> ................
> 00000040: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |
> ................
> 00000050: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |
> ................
> 00000060: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |
> ................
> 00000070: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |
> ................
> 00000080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |
> ................
> 00000090: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |
> ................
> 000000A0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |
> ................
> 000000B0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |
> ................
> 000000C0: 00 00 00 00 00 00 00 00
>
> Packet captured at spirent(destination):
> 00 10 94 00 00 05 00 01 02 03 04 05 81 00 00 00
> 08 00 45 00 00 EA 00 02 6e fe 3F 11 00 00 02 02
> 02 02 05 05 05 02 62 A4 f5 f8 00 D6 0E F2 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
> 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>
>
> Thanks,
> Jagan P
>
> =====================================================
> Please refer to https://northamerica.altran.com/email-disclaimer
> for important disclosures regarding this electronic communication.
> =====================================================
>