From: "songj@zctt.com" <songj@zctt.com>
To: stephen <stephen@networkplumber.org>
Cc: "Ido Goshen" <Ido@cgstowernetworks.com>, users <users@dpdk.org>
Subject: Re: [dpdk-users] Is it possible to receive packets with bad CRC?
Date: Wed, 9 Jun 2021 12:58:52 +0800 [thread overview]
Message-ID: <2021060912584016728766@zctt.com> (raw)
In-Reply-To: <20210608082326.66e83722@hermes.local>
Hi Stephen
Thank you very much, you point out the correct function rte_pmd_ixgbe_udp_fctrl_sbp that I want.
I do a quick test about if DPDK can receive error packet:
1. With the original DPDK testpmd just show the number of error packets in RX-errors, but not RX-packets.
2. I modify fucntion ixgbe_dev_rx_init with adding IXGBE_FCTRL_SBP for the eth device, Testpmd will show the number of error packets both in RX-errors and RX-packets，so the eth device can receive error packets in DPDK now.
Thanks
Jie
> Hi Ido,
> I have the same question as yours, I want to get all the packets even the CRC/FCS error packet.
> Without DPDK I set the nic with "ethtool -K rx-all on", Then i can tcpdump all the packets both good and error packets.
> But I have no ideal with DPDK. Did you find something for this question?
>
>
> Thanks
>
>
> Jie
>
>
>
>
>
>
> ------------------ Original ------------------
> From: "Ido Goshen"<Ido@cgstowernetworks.com>;
> Date: Mon, Dec 14, 2020 00:56 AM
> To: "users@dpdk.org"<users@dpdk.org>;
>
> Subject: [dpdk-users] Is it possible to receive packets with bad CRC?
>
>
>
> Hi
>
> By default bad CRC packets are dropped and raise the ierror counter.
>
> Is there a way to change this behavior for I350 (igb) and rx it by the app?
>
> I’ve tried setting DEV_RX_OFFLOAD_KEEP_CRC but this doesn’t help (I think this only keeps CRC for good packets)
> I’ve also tried enabling the Store Bad Packet (not sure what it does but it’s the closet I could find) by setting in e1000/igb_rxtx.c
> rctl |= E1000_RCTL_SBP; E1000_WRITE_REG(hw, E1000_RCTL, rctl);
> Didn’t help either.
>
> Is it possible to do with I350?
> Or with any of the other intel NICs? X522 (ixgbe) or X710 (i40e)?
>
> Thanx,
>
> * Ido
Please don't use HTML mail on the DPDK mailing list.
The DPDK ethdev API does not have a way to enable storing bad packets.
The DPDK ixgbe driver has a device specific API call rte_pmd_ixgbe_udp_fctrl_sbp which may
do what you want. Device specific API's are discouraged but possible.
prev parent reply other threads:[~2021-06-09 4:59 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-13 16:55 Ido Goshen
2021-06-08 3:44 ` JieSong
2021-06-08 15:23 ` Stephen Hemminger
2021-06-09 4:58 ` songj [this message]
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