[SOLVED] ethernet interface not recognized

barbaros · 2024-12-13 08:38:39

Hello everybody,
I am trying to install archlinux and I have trouble using the ethernet link.
When I boot from archlinux installation media (which I call archlinux-live in the sequel) everything works fine.
In dmesg I see :

[    2.820320] tg3 0000:04:00.0 eth0: Tigon3 [partno(BCM95720) rev 5720000] (PCI Express) MAC address d0:46:0c:70:94:fe
[    2.820325] tg3 0000:04:00.0 eth0: attached PHY is 5720C (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
[    2.820328] tg3 0000:04:00.0 eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] TSOcap[1]
[    2.820330] tg3 0000:04:00.0 eth0: dma_rwctrl[00000001] dma_mask[64-bit]
[   52.270417] tg3 0000:04:00.0 eno8303: renamed from eth0
[   57.024269] tg3 0000:04:00.0 eno8303: Link is up at 1000 Mbps, full duplex
[   57.024280] tg3 0000:04:00.0 eno8303: Flow control is off for TX and off for RX
[   57.024283] tg3 0000:04:00.0 eno8303: EEE is enabled

If I unplug the cable I see :

[  120.954987] tg3 0000:04:00.0 eno8303: Link is down

And when I plug it back :

[  137.632205] tg3 0000:04:00.0 eno8303: Link is up at 1000 Mbps, full duplex
[  137.632224] tg3 0000:04:00.0 eno8303: Flow control is off for TX and off for RX
[  137.632231] tg3 0000:04:00.0 eno8303: EEE is enabled

In the installed archlinux the interface does not work. In dmesg I see :

[    4.014856] tg3 0000:04:00.0 eth0: Tigon3 [partno(BCM95720) rev 5720000] (PCI Express) MAC address d0:46:0c:70:94:fe
[    4.014862] tg3 0000:04:00.0 eth0: attached PHY is 5720C (10/100/1000Base-T Ethernet) (WireSpeed[1], EEE[1])
[    4.014865] tg3 0000:04:00.0 eth0: RXcsums[1] LinkChgREG[0] MIirq[0] ASF[1] TSOcap[1]
[    4.014867] tg3 0000:04:00.0 eth0: dma_rwctrl[00000001] dma_mask[64-bit]
[    4.047177] tg3 0000:04:00.0 eno8303: renamed from eth0

When I unplug the cable the led goes off but dmesg produces no ouput.
When I plug it back the led comes to life but dmesg produces no ouput.
Unsurprisingly, ping reports temporary failure in name resolution.

The machine has other ethernet adapters but I do not include that information since it does not seem relevant.

Thank you for any suggestion. Cristian

Last edited by barbaros (2024-12-19 09:00:23)

seth · 2024-12-13 09:33:48

* Forgot to install linux-firmware ?
* Test the LTS kernel.
* Do you use any power management tools like TLP?

Last resort you'll have to please post your complete system journal for the boot:

sudo journalctl -b | curl -F 'file=@-' 0x0.st

There could be bus errors, an interrupt storm or god knows what else breaking the ethernet down the road.

xerxes_ · 2024-12-13 09:47:30

That is because you have to setup internet connection yourself (as many things in Archlinux) because you have few options to choose (in this case: dhcpcd, NetworkManager, systemd-networkd, etc.). Pick one and go: https://wiki.archlinux.org/title/Network_interface

barbaros · 2024-12-13 18:23:06

xerxes_ : That makes sense, thank you. I will try.

seth : What does the command 'curl -F ...' do exactly ? Recall my complaint is that I cannot access the internet in the first place.

seth · 2024-12-13 18:47:18

https://wiki.archlinux.org/title/Tethering but that would only be relevant after all other options have been exhausted.
It'll upload the stdin into 0x0.st and get you a url to share in return, also see the 1st link below.

barbaros · 2024-12-19 07:57:59

Here are the steps I took.

Recall that, after boot, 'ip address show' gives

2: eno8303: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN group default qlen 1000
    link/ether d0:46:0c:70:94:fe brd ff:ff:ff:ff:ff:ff
    altname enp4s0f0
    altname enxd0460c7094fe

I gave the command 'ip link set eno8303 up' and then the output of 'ip address show' changed to

2: eno8303: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether d0:46:0c:70:94:fe brd ff:ff:ff:ff:ff:ff
    altname enp4s0f0
    altname enxd0460c7094fe
    inet6 fe80::d246:cff:fe70:94fe/64 scope link proto kernel_ll 
       valid_lft forever preferred_lft forever

That's an improvement.
Then I installed the package 'dhclient'. After giving the command 'dhclient eno8303', the output of 'ip address show' changed to

2: eno8303: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc mq state UP group default qlen 1000
    link/ether d0:46:0c:70:94:fe brd ff:ff:ff:ff:ff:ff
    altname enp4s0f0
    altname enxd0460c7094fe
    inet 10.101.88.16/22 brd 10.101.91.255 scope global eno8303
       valid_lft forever preferred_lft forever
    inet6 fe80::d246:cff:fe70:94fe/64 scope link proto kernel_ll 
       valid_lft forever preferred_lft forever

That's a huge improvement. Now 'ping' works both ways (from my machine I can reach the outside world and from outside I can reach my machine). Cannot log in through 'ssh' yet.

Next challenges :
1. Launch the commands 'ip link set eno8303 up' and 'dhclient eno8303' automatically at boot.
2. Install sshd

Bottom line: archlinux is fun !

seth · 2024-12-19 09:01:40

https://archlinux.org/packages/extra/x86_64/dhclient/ comes w/ a service you can enable.
You could also just use dhcpcd which is a bit more elaborate.

Please always remember to mark resolved threads by editing your initial posts subject - so others will know that there's no task left, but maybe a solution to find.
Thanks.
F5…

Last edited by seth (2024-12-19 09:01:58)

barbaros · 2024-12-19 14:20:04

Yes, I just enabled dhclient as a service. Relevant commands are 'pacman -Qql dhclient | grep -Fe .service -e .socket' and 'systemctl enable dhclient@eno8303'.

Also, I installed the 'openssh' package. Works OK after adding 'PermitRootLogin yes' to the configuration file. It took me a while to understand that the right file to edit is '/etc/ssh/sshd_config' rather than '/etc/ssh/ssh_config' ...

Thank you both !

Last edited by barbaros (2024-12-19 14:46:22)

seth · 2024-12-19 18:19:36

Works OK after adding 'PermitRootLogin yes'

Fwwi, you should refrain from logging in as root at all, certainly not via ssh and UNDER NO CIRCUMSTANCES enable that for a WAN facing host (if you can reach it from the internet)
In that case rather see https://wiki.archlinux.org/title/OpenSSH#Protection

Arch Linux

#1 2024-12-13 08:38:39

[SOLVED] ethernet interface not recognized

#2 2024-12-13 09:33:48

Re: [SOLVED] ethernet interface not recognized

#3 2024-12-13 09:47:30

Re: [SOLVED] ethernet interface not recognized

#4 2024-12-13 18:23:06

Re: [SOLVED] ethernet interface not recognized

#5 2024-12-13 18:47:18

Re: [SOLVED] ethernet interface not recognized

#6 2024-12-19 07:57:59

Re: [SOLVED] ethernet interface not recognized

#7 2024-12-19 09:01:40

Re: [SOLVED] ethernet interface not recognized

#8 2024-12-19 14:20:04

Re: [SOLVED] ethernet interface not recognized

#9 2024-12-19 18:19:36

Re: [SOLVED] ethernet interface not recognized

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