netdev - Re: [Intel-wired-lan] i40e error handling LLDP messages from Arista switches

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Message-ID: <CAH9ADKWKYYqahQdrso3Nf556WzuF4ZnVPkz9pGO0NqDsQNbqOQ@mail.gmail.com>
Date:	Tue, 19 Apr 2016 16:20:28 -0400
From:	Jeremy Ashton <jeremy.ashton@...pify.com>
To:	"Parikh, Neerav" <neerav.parikh@...el.com>
Cc:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
Subject: Re: [Intel-wired-lan] i40e error handling LLDP messages from Arista switches

Is there a way to disable the lldp daemon running in the firmware?

On Tue, Apr 19, 2016 at 2:31 PM, Parikh, Neerav <neerav.parikh@...el.com> wrote:
>
>
>> -----Original Message-----
>> From: Jeremy Ashton [mailto:jeremy.ashton@...pify.com]
>> Sent: Tuesday, April 19, 2016 11:10 AM
>> To: Parikh, Neerav <neerav.parikh@...el.com>
>> Cc: netdev@...r.kernel.org; intel-wired-lan@...ts.osuosl.org
>> Subject: Re: [Intel-wired-lan] i40e error handling LLDP messages from Arista
>> switches
>>
>> So, what commands exactly are you looking to have run?  Would packet
>> capture of the lldp traffic help?
>>
> LLDP is running in the i40e device firmware so unless you've a packet capture on
> the wire (Xgig) you may not see that in the wireshark/tshark on the host system.
>
> The debugfs commands I was referring to below can help capture some
> information; and for that you may need to mount the debugfs file system on
> your setup. If debugfs is supported then once you've that mounted and have the
> i40e driver loaded then you may see an entry named "i40e" under the mount point.
> Assuming debugfs is mounted on /sys/kernel/debug the i40e directory will be under
> /sys/kernel/debug/i40e. This directory will have entry for each PCIe device being
> managed by the i40e driver. You can select the PCIe device that maps to the device
> in question and can run the commands like:
> echo "dump port" > /sys/kernel/debug/i40e/<pci-path>/command
> echo "lldp get local" > /sys/kernel/debug/i40e/<pci-path>/command
> echo "lldp get remote" > /sys/kernel/debug/i40e/<pci-path>/command
>
> The output of these commands will show up in the dmesg log.
>
> One another I noticed in your thread on the PF_RING bz is that you're using inbox
> Ubuntu driver. Have you tried with current upstream and seen this issue?
>
> Thanks,
> Neerav
>
>> On Tue, Apr 19, 2016 at 1:53 PM, Parikh, Neerav <neerav.parikh@...el.com>
>> wrote:
>> > Resending as the original email was sent in HTLM format and hence my reply
>> went in that format
>> > as well; which got rejected by netdev mailer.
>> >
>> >> -----Original Message-----
>> >> From: Intel-wired-lan [mailto:intel-wired-lan-bounces@...ts.osuosl.org] On
>> Behalf Of Parikh, Neerav
>> >> Sent: Tuesday, April 19, 2016 10:45 AM
>> >> To: Jeremy Ashton <jeremy.ashton@...pify.com>
>> >> Cc: netdev@...r.kernel.org; intel-wired-lan@...ts.osuosl.org
>> >> Subject: Re: [Intel-wired-lan] i40e error handling LLDP messages from Arista
>> switches
>> >>
>> >> > From: Intel-wired-lan [mailto:intel-wired-lan-bounces@...ts.osuosl.org] On
>> Behalf Of Jeremy Ashton
>> >> > Sent: Tuesday, April 19, 2016 10:26 AM
>> >> > Cc: netdev@...r.kernel.org; intel-wired-lan@...ts.osuosl.org
>> >> > Subject: [Intel-wired-lan] i40e error handling LLDP messages from Arista
>> switches
>> >> >
>> >> > I have been trying to get pf_ring with zc running on ubuntu 14.04.  The
>> thread can be found here:
>> >> >
>> >> > https://github.com/ntop/PF_RING/issues/81
>> >> >
>> >> > Unfortunately it seems there is a bug in i40e which is carried into the code
>> base for i40e_zc.
>> >> >
>> >> > $ modinfo i40e
>> >> > filename:       /lib/modules/3.19.0-58-
>> generic/kernel/drivers/net/ethernet/intel/i40e/i40e.ko
>> >> > version:        1.2.2-k
>> >> > license:        GPL
>> >> > description:    Intel(R) Ethernet Connection XL710 Network Driver
>> >> > author:         Intel Corporation, <e1000-devel@...ts.sourceforge.net>
>> >> > srcversion:     E3DEEE00F49BBFBB8FF33A7
>> >> > alias:          pci:v00008086d00001586sv*sd*bc*sc*i*
>> >> > alias:          pci:v00008086d00001585sv*sd*bc*sc*i*
>> >> > alias:          pci:v00008086d00001584sv*sd*bc*sc*i*
>> >> > alias:          pci:v00008086d00001583sv*sd*bc*sc*i*
>> >> > alias:          pci:v00008086d00001581sv*sd*bc*sc*i*
>> >> > alias:          pci:v00008086d00001580sv*sd*bc*sc*i*
>> >> > alias:          pci:v00008086d0000157Fsv*sd*bc*sc*i*
>> >> > alias:          pci:v00008086d00001574sv*sd*bc*sc*i*
>> >> > alias:          pci:v00008086d00001572sv*sd*bc*sc*i*
>> >> > depends:        ptp,vxlan
>> >> > intree:         Y
>> >> > vermagic:       3.19.0-58-generic SMP mod_unload modversions
>> >> > signer:         Magrathea: Glacier signing key
>> >> > sig_key:
>> DE:B3:43:0A:26:E6:7D:3D:3B:54:B9:DD:13:25:B3:3A:46:B2:F2:DD
>> >> > sig_hashalgo:   sha512
>> >> > part:           debug:Debug level (0=none,...,16=all) (int)
>> >> >
>> >> >
>> >> > I wonder if someone might offer some insight as to the next steps to
>> debug/resolve this.
>> >> >
>> >> > Cheers.
>> >> >
>> >> > Can you send us the dmesg output after running i40e debugfs commands
>> >> > viz. “dump port”, “llpd get local” , “lldp get remote”, for the port that is
>> showing
>> >> > this behavior? Also, do you happen to know what is the Arista side
>> configuration?
>> >> > This will help us debug better.
>> >> >
>> >> > Thanks,
>> >> > Neerav