Most modern linux systems have udev rules that create a consistent name mechanism for each hardware interface, so eth# is rarely used anymore. This of course depends on how highly customized you made your yocto based OS. I would suggest running dmesg and searching for "eth", or the more modern "en". On my Atom board you can see my dmesg output and it is using a realtek 8169 for the PHY:
dmesg | grep eth [ 3.178558] r8169 0000:02:00.0 eth0: RTL8168h/8111h at 0xffffaee5401dd000, 00:07:32:95:7a:1e, XID 14100800 IRQ 121 [ 3.188701] r8169 0000:02:00.0 eth0: jumbo features [frames: 9200 bytes, tx checksumming: ko] [ 3.212560] r8169 0000:03:00.0 eth1: RTL8168h/8111h at 0xffffaee5401e5000, 00:07:32:95:7a:1f, XID 14100800 IRQ 122 [ 3.222703] r8169 0000:03:00.0 eth1: jumbo features [frames: 9200 bytes, tx checksumming: ko] [ 4.654901] r8169 0000:03:00.0 eno1: renamed from eth1 [ 4.664799] r8169 0000:02:00.0 enp2s0: renamed from eth0 I hope that helps you find your correct interface name. If you don't know what PHY you have I would suggest consulting your board manufacturer On Fri, Oct 6, 2023 at 5:57 PM Matt <[email protected]> wrote: > Hi all, > We are working on a customized Linux system using Yocto on Intel x6000E > CPU (6413 Elkhart Lake). The Yocto branch used is kirkstone; the Yocto > machine used is intel-corei7-64; kernel version is 5.15.94. > The Linux seems to start without issues. However, there is no network > device eth0.This is the "ifup" output: > $ ifup eth0 > ip: can't find device 'eth0' > ip: SIOCGIFFLAGS: No such device > ip: can't find device 'eth0' > > I believe an external PHY driver is added to the Linux kernel using > menuconfig. So I suspect the cause of no network device eth0 may be the > proper Ethernet driver not included. > > Questions: > 1. What is the correct Ethernet driver to include for the x6413? If the > Ethernet driver is not the cause, what else need to be done to get the > Ethernet device (eth0) up? > 2. Is meta-ptcm required to get Ethernet working on x6413? > > Any pointers are appreciated! > > Thank you for your help! > > > -- [image: iunu.com] <https://iunu.com> *Donovan Sydow* Field Engineering Director Phone: 206.229.8740 *iunu.com <http://www.iunu.com/>*
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