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#1 2019-11-26 22:23:47

Bidski
Member
Registered: 2019-07-31
Posts: 12

[SOLVED] Network interface names in the live environment

I am wondering what scheme the Arch Linux live environment is using to name network interface names.

When I boot into the live environment and run

ip -br link

I see

lo           UNKNOWN        00:00:00:00:00:00 <LOOPBACK,UP,LOWER_UP> 
eno1         DOWN           1c:69:7a:06:ff:85 <BROADCAST,MULTICAST> 
wlan0        DOWN           04:ea:56:82:55:b9 <BROADCAST,MULTICAST> 

However, after installing Arch Linux and booting into the new system, running

ip -br link

produces

lo               UNKNOWN        00:00:00:00:00:00 <LOOPBACK,UP,LOWER_UP> 
eno1             DOWN           1c:69:7a:06:ff:85 <BROADCAST,MULTICAST> 
wlp0s20f3        DOWN           04:ea:56:82:55:b9 <BROADCAST,MULTICAST> 

I am guessing that both the live environment and the installed are using the predictable network interface naming, but if this was the case then I would expect both systems to name the wireless interface the same way. So, what is causing the difference?

Last edited by Bidski (2020-01-14 21:37:07)

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#2 2019-12-09 19:42:21

VCoolio
Member
From: Netherlands
Registered: 2010-01-05
Posts: 120

Re: [SOLVED] Network interface names in the live environment

It seems udev decides to make it difficult. This bugged me too and caused issues, but you can easily revert it to wlan0. Check the wiki. I went for the kernel parameters option.

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#3 2019-12-09 22:07:36

Bidski
Member
Registered: 2019-07-31
Posts: 12

Re: [SOLVED] Network interface names in the live environment

VCoolio wrote:

It seems udev decides to make it difficult. This bugged me too and caused issues, but you can easily revert it to wlan0. Check the wiki. I went for the kernel parameters option.

Reverting wlp0s20f3 to wlan0 is not what I desire. I would desire to have the live environment bring up wlp0s20f3 which is what I think it should be doing.

Ultimately, what  I desire is to have the freshly installed environment match the environment seen in the live environment so that I can reliably set up network interfaces during installation so that the system is fully operational from the first boot.

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#4 2019-12-10 01:46:02

loqs
Member
Registered: 2014-03-06
Posts: 9,590

Re: [SOLVED] Network interface names in the live environment

@Bidski in the live environment does the journal contain any entries indicating the interface is renamed?

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#5 2019-12-10 01:58:54

Bidski
Member
Registered: 2019-07-31
Posts: 12

Re: [SOLVED] Network interface names in the live environment

loqs wrote:

@Bidski in the live environment does the journal contain any entries indicating the interface is renamed?

Not sure what other commands to run or what to look for? Does this answer your question?

$ journalctl -xb | grep wl
Dec 10 01:48:22 archiso kernel: iwlwifi 0000:00:14.3: enabling device (0000 -> 0002)
Dec 10 01:48:22 archiso kernel: iwlwifi 0000:00:14.3: Found debug destination: EXTERNAL_DRAM
Dec 10 01:48:22 archiso kernel: iwlwifi 0000:00:14.3: Found debug configuration: 0
Dec 10 01:48:22 archiso kernel: iwlwifi 0000:00:14.3: loaded firmware version 46.6bf1df06.0 op_mode iwlmvm
Dec 10 01:48:22 archiso kernel: wl: loading out-of-tree module taints kernel.
Dec 10 01:48:22 archiso kernel: wl: module license 'MIXED/Proprietary' taints kernel.
Dec 10 01:48:22 archiso kernel: wl: module verification failed: signature and/or required key missing - tainting kernel
Dec 10 01:48:22 archiso kernel: iwlwifi 0000:00:14.3: Detected Intel(R) Dual Band Wireless AC 9560, REV=0x318
Dec 10 01:48:22 archiso kernel: iwlwifi 0000:00:14.3: Applying debug destination EXTERNAL_DRAM
Dec 10 01:48:22 archiso kernel: iwlwifi 0000:00:14.3: Allocated 0x00400000 bytes for firmware monitor.
Dec 10 01:48:22 archiso kernel: iwlwifi 0000:00:14.3: base HW address: 04:ea:56:82:55:b9
Dec 10 01:48:23 archiso kernel: ieee80211 phy0: Selected rate control algorithm 'iwl-mvm-rs'
$ journalctl -xb | grep udevd
Dec 10 01:48:21 archiso systemd-udevd[382]: /usr/lib/udev/rules.d/11-dm-lvm.rules:40 Invalid value for OPTIONS key, ignoring: 'event_timeout=180'
Dec 10 01:48:21 archiso systemd-udevd[382]: /usr/lib/udev/rules.d/11-dm-lvm.rules:40 The line takes no effect, ignoring.
-- Subject: A start job for unit systemd-udevd.service has finished successfully
-- A start job for unit systemd-udevd.service has finished successfully.
Dec 10 01:48:21 archiso audit[1]: SERVICE_START pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-udevd comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Dec 10 01:48:21 archiso kernel: audit: type=1130 audit(1575942501.785:4): pid=1 uid=0 auid=4294967295 ses=4294967295 msg='unit=systemd-udevd comm="systemd" exe="/usr/lib/systemd/systemd" hostname=? addr=? terminal=? res=success'
Dec 10 01:48:22 archiso systemd-udevd[393]: Using default interface naming scheme 'v243'.
Dec 10 01:48:22 archiso systemd-udevd[393]: ethtool: autonegotiation is unset or enabled, the speed and duplex are not writable.
Dec 10 01:48:22 archiso systemd-udevd[396]: ethtool: autonegotiation is unset or enabled, the speed and duplex are not writable.
Dec 10 01:48:22 archiso systemd-udevd[394]: Using default interface naming scheme 'v243'.
Dec 10 01:48:22 archiso systemd-udevd[397]: cfg80211: Process '/usr/bin/set-wireless-regdom' failed with exit code 1.
Dec 10 01:48:23 archiso systemd-udevd[389]: Using default interface naming scheme 'v243'.
Dec 10 01:48:23 archiso systemd-udevd[389]: ethtool: autonegotiation is unset or enabled, the speed and duplex are not writable.

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#6 2019-12-10 08:19:30

loqs
Member
Registered: 2014-03-06
Posts: 9,590

Re: [SOLVED] Network interface names in the live environment

I was looking for a message containing:

wlp0s20f3: renamed from wlan0

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#7 2019-12-10 21:38:44

Bidski
Member
Registered: 2019-07-31
Posts: 12

Re: [SOLVED] Network interface names in the live environment

loqs wrote:

I was looking for a message containing:

wlp0s20f3: renamed from wlan0

The only line containing the word "renamed" is

Dec 10 21:31:35 archiso kernel: e1000e 0000:00:1f.6 eno1: renamed from eth0

The installed system has a line for both the wired and the wireless interfaces being renamed.

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#8 2020-01-14 02:39:34

Bidski
Member
Registered: 2019-07-31
Posts: 12

Re: [SOLVED] Network interface names in the live environment

Does anyone have any idea as to why the interfaces are not being named correctly in the live environment?

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#9 2020-01-14 02:58:11

loqs
Member
Registered: 2014-03-06
Posts: 9,590

Re: [SOLVED] Network interface names in the live environment

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#10 2020-01-14 21:34:07

Bidski
Member
Registered: 2019-07-31
Posts: 12

Re: [SOLVED] Network interface names in the live environment

The solution in this post solves my issues.

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