On Tue, 8 Jun 2021 11:44:10 +0800 "JieSong" <[email protected]> wrote:
> 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"<[email protected]>; > Date: Mon, Dec 14, 2020 00:56 AM > To: "[email protected]"<[email protected]>; > > 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.
