Dear John,
We found the problem using our DPDK application, but later on we reproduced
the same issue using in-kernel drivers (even after fresh reboot).
Best Regards,
Michał Mirosław
2016-04-21 16:54 GMT+02:00 Ronciak, John <john.ronc...@intel.com>:
> > -----Original Message-----
> > From: Michał Mirosław [mailto:michal.miros...@atendesoftware.pl]
> > Sent: Thursday, April 21, 2016 5:45 AM
> > To: e1000-devel@lists.sourceforge.net; intel-wired-...@lists.osuosl.org
> > Cc: Paweł Małachowski <pawel.malachow...@atendesoftware.pl>; mirq-
> > li...@rere.qmqm.pl
> > Subject: [E1000-devel] i40e: Deadly GRE packet
> >
> > Dear Developers,
> >
> > I have a setup of a pair of SuperMicro-branded XL710s connected with
> > passive crossover cable, one (eth4) is using firmware 5.0, the other
> (eth7) is
> > using fw 4.33. When I send couple of packets with no payload in GRE over
> IP
> > over ETH from eth7 to eth4, the receiving card stops processing further
> > packets. It seems that 4 empty-GRE packets in succession are enough to
> kill
> > the card's receivers (all ports stop working), more if there are other
> packets
> > inbetween. Transmit direction is not affected. After reboot, the card
> comes
> > back, reloading the driver (or unbind/bind) is not enough to fix the
> problem.
> >
> > 14:31:24.299203 00:00:00:00:00:00 > ff:ff:ff:ff:ff:ff, ethertype IPv4
> (0x0800),
> > length 60: (tos 0x0, ttl 64, id 1, offset 0, flags [none], proto GRE
> (47), length
> > 24)
> > 127.0.0.1 > 127.0.0.1: GREv0, Flags [none], proto unknown (0x0000),
> length
> > 4
> > gre-proto-0x0
> > 0x0000: 4500 0018 0001 0000 402f 7cb4 7f00 0001 E.......@
> /|.....
> > 0x0010: 7f00 0001 0000 0000 0000 0000 0000 0000
> ................
> > 0x0020: 0000 0000 0000 0000 0000 0000 0000 ..............
> >
> > scapy 2.2.0 generates this packet from: Ether()/IP()/GRE()
> >
> > Tested on stock Debian kernel, with in-kernel driver and one from
> DPDK-2.2.
> > Linux lab1 3.16.0-4-amd64 #1 SMP Debian 3.16.7-ckt25-2 (2016-04-08)
> x86_64
> > GNU/Linux
> >
> > Best Regards,
> > Michał Mirosław
> How exactly is DPDK involved? Is it running in all instances where the
> issue is seen? Have you tried the latest i40e driver from our Sourceforge
> site (http://e1000.sf.net)?
>
> Cheers,
> John
>
>
>
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