On Wed, Jun 12, 2024 at 03:16:41PM -0400, Greg Wooledge wrote: > On Wed, Jun 12, 2024 at 09:01:44PM +0200, to...@tuxteam.de wrote:
[...] > > Mine loks like this: > > > > GRUB_CMDLINE_LINUX_DEFAULT="quiet net.ifnames=0" > > People who are thinking of doing this should take a moment to consider > whether it will be better or worse than the default. Absolutely. I did, and I decided that in my case, this is the better choice... > For a machine that has exactly one ethernet interface, this is a vast > improvement over the default. Your interface will always be named > "eth0" no matter what crazy things happen on the PCI bus. ...but it's not always, as you say. > For a machine with multiple interfaces, however, the original problem > that "predictable interface names" were supposed to solve is still an > issue. The kernel may not assign the names in the same order every > time you boot. In that situation, "net.ifnames=0" is not likely to > be an improvement. You'd be better off using systemd.link(5) files to > customize your interface names according to your own specific needs. I think PCI is not the worst offender. The worst is if you have a bunch of adapters hanging off an USB tree. Then, as they say, God does play dice :-) Back Then (TM) (I think it was a Debian 3.x aka Sarge), a bunch of us cobbled a "router thingy" together on some off-the-shelf hardware. It had four Ethernets hanging off whatever PC bus was fashionable back then (too lazy to look it up). Not many of those were sold, luckily :-) One was for "the bad Internet", the other three for "the inside". Our big fear was that, after a BIOS upgrade the interfaces would come up in a mangled order. That would have been a good application of this scheme (provided it works at all: I'm somewhat sceptic. Hardware and firmware are known to do... things). We ended up going by the card's MAC addresses, at the price of having a set up step on assembly. But then, if you change one Ethernet card... Alas, you can't do it right. For my laptop, I very much prefer to say "sudo ifup eth0" than to say "sudo ifup en0ps&&@*#!☠" thankyouverymuch :) Cheers -- t
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