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Byter

Member

Registered: 2014-02-07

Posts: 8

[Solved] Help explaining mystery ethernet interface

I have three network interfaces as shown by 'ip link', two of which make sense to me.

lo, the loopback.
eno1, the onboard ethernet which I am using to post this.

But I also have an enp0s20u5 which I understand indicates a PCI device (from the 'p'). I do not have anything plugged into the expansion slot on my motherboard.

My motherboard is https://www.asus.com/us/Motherboards/H87IPLUS/
which lists a single 'Intel® I217, 1 x Gigabit LAN Controller(s)'

So where is enp0s20u5 coming from?

Thanks for your help.

Last edited by Byter (2015-10-15 23:34:02)

ewaller

Administrator

From: Pasadena, CA

Registered: 2009-07-13

Posts: 20,349

Re: [Solved] Help explaining mystery ethernet interface

What is the output of lspci -nn    ?  (That is two n characters, not an m)

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Byter

Member

Registered: 2014-02-07

Posts: 8

Re: [Solved] Help explaining mystery ethernet interface

What is the output of lspci -nn    ?  (That is two n characters, not an m)

$ lspci -nn
00:00.0 Host bridge [0600]: Intel Corporation 4th Gen Core Processor DRAM Controller [8086:0c00] (rev 06)
00:01.0 PCI bridge [0604]: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor PCI Express x16 Controller [8086:0c01] (rev 06)
00:02.0 VGA compatible controller [0300]: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor Integrated Graphics Controller [8086:0402] (rev 06)
00:03.0 Audio device [0403]: Intel Corporation Xeon E3-1200 v3/4th Gen Core Processor HD Audio Controller [8086:0c0c] (rev 06)
00:14.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB xHCI [8086:8c31] (rev 05)
00:16.0 Communication controller [0780]: Intel Corporation 8 Series/C220 Series Chipset Family MEI Controller #1 [8086:8c3a] (rev 04)
00:19.0 Ethernet controller [0200]: Intel Corporation Ethernet Connection I217-V [8086:153b] (rev 05)
00:1a.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #2 [8086:8c2d] (rev 05)
00:1b.0 Audio device [0403]: Intel Corporation 8 Series/C220 Series Chipset High Definition Audio Controller [8086:8c20] (rev 05)
00:1d.0 USB controller [0c03]: Intel Corporation 8 Series/C220 Series Chipset Family USB EHCI #1 [8086:8c26] (rev 05)
00:1f.0 ISA bridge [0601]: Intel Corporation H87 Express LPC Controller [8086:8c4a] (rev 05)
00:1f.2 SATA controller [0106]: Intel Corporation 8 Series/C220 Series Chipset Family 6-port SATA Controller 1 [AHCI mode] [8086:8c02] (rev 05)
00:1f.3 SMBus [0c05]: Intel Corporation 8 Series/C220 Series Chipset Family SMBus Controller [8086:8c22] (rev 05)

http://ark.intel.com/products/70831/Int … ion-I217-V

Last edited by Byter (2015-10-15 12:46:48)

rsmarples

Member

Registered: 2009-05-12

Posts: 287

Re: [Solved] Help explaining mystery ethernet interface

So where is enp0s20u5 coming from?

The u5 implies it's plugged into USB port #5 - so a USB dongle of somekind.
Maybe a smartphone sharing it's internet connection?

Byter

Member

Registered: 2014-02-07

Posts: 8

Re: [Solved] Help explaining mystery ethernet interface

So where is enp0s20u5 coming from?

The u5 implies it's plugged into USB port #5 - so a USB dongle of somekind.
Maybe a smartphone sharing it's internet connection?

Thanks, that was it.