Realtek r8169 always flapping
Kseniya Blashchuk
ksyblast at gmail.com
Tue Oct 27 07:27:30 UTC 2015
BTW, I thought maybe its not a driver but a NIC issue and some of the pins
dont work properly. Maybe anybody knows how to check if all NIC pins are
working?
вт, 27 окт. 2015 г. в 9:07, Kseniya Blashchuk <ksyblast at gmail.com>:
> Tried setting just speed 1000 duplex full - no difference.
> After that set speed 1000 duplex full on a switch side - link down O_o.
> After changing to 100 everything is working.
> Now set ETHTOOL_OPTS="autoneg off speed 100 duplex full" only on my side
> (and auto on a switch - standard port config)
> No flapping so far on 100Mbps. I think I will use this workaround, still
> very strange why it doesn't work properly on 1000, I guess its a kernel
> module problem or something like that. If anybody still has any suggestions
> about 1Gbps - you are welcome :).
>
> пн, 26 окт. 2015 г. в 21:47, Rick Stevens <ricks at alldigital.com>:
>
>> On 10/26/2015 11:24 AM, Kseniya Blashchuk wrote:
>> > I tried disabling autoneg, and it helped, but in this case dot1x auth
>> > doesn't work for some reason, I didn't have time to troubleshoot why,
>> > but there is no mac address on a switch port when dot1x is enabled.
>> > But i didn't try setting speed 1000 duplex full on a switch side. I'll
>> > try it tomorrow once again.
>>
>> Not sure what's on the end of your dot1x, but it may be part of the
>> autonegotiation process to make that all work. You can leave autoneg
>> on to get by that, but still set the speeds and such once its done. That
>> may get squonked (new word) by future negotiations. Dunno.
>>
>> > On Mon, Oct 26, 2015, 9:14 PM Rick Stevens <ricks at alldigital.com
>> > <mailto:ricks at alldigital.com>> wrote:
>> >
>> > On 10/26/2015 09:57 AM, Kseniya Blashchuk wrote:
>> > > Hi everyone!
>> > > I noticed in dmesg that my ethernet link is flapping all the time
>> > > [Oct25 18:55] r8169 0000:02:00.0 enp2s0: link down
>> > > [ +3.131667] r8169 0000:02:00.0 enp2s0: link up
>> > > [Oct25 18:56] r8169 0000:02:00.0 enp2s0: link down
>> > > [ +2.763688] r8169 0000:02:00.0 enp2s0: link up
>> > > [Oct25 18:59] r8169 0000:02:00.0 enp2s0: link down
>> > > [ +3.060069] r8169 0000:02:00.0 enp2s0: link up
>> > > [Oct25 19:00] r8169 0000:02:00.0 enp2s0: link down
>> > > [ +3.559610] r8169 0000:02:00.0 enp2s0: link up
>> > > I changed the cabling, tried to plug into another switch no
>> > difference.
>> > > Any ideas will be very appreciated as this flapping brings a lot
>> of
>> > > inconvenience.
>> > > My device in lspci:
>> > > 02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd.
>> > > RTL8111/8168/8411 PCI Express Gigabit Ethernet Controller (rev
>> 10)
>> >
>> > Uhm, could be a kernel issue or a driver issue. Generally when I see
>> > that sort of thing it's an auto speed or auto duplex negotiation
>> between
>> > the driver and switch that isn't working. You could try forcing the
>> > speed and duplex via something like:
>> >
>> > sudo ethtool -s enp2s0 autoneg off duplex full speed 1000
>> >
>> > to set a fixed 1Gbps, full duplex connection and see if that helps
>> > stabilize things. If that works you could try to restart auto
>> > renegotiation via
>> >
>> > sudo ethtool -s enp2s0 autoneg on
>> > sudo ethtool -r enp2s0
>> >
>> > The first comment re-enables autonegotiation, the second forces a
>> > renegotiation.
>> >
>> ----------------------------------------------------------------------
>> > - Rick Stevens, Systems Engineer, AllDigital ricks at alldigital.com
>> > <mailto:ricks at alldigital.com> -
>> > - AIM/Skype: therps2 ICQ: 226437340 Yahoo:
>> origrps2 -
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>>
>> --
>> ----------------------------------------------------------------------
>> - Rick Stevens, Systems Engineer, AllDigital ricks at alldigital.com -
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>
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