On Sat, 12 Dec 2020 14:15:53 +0100
Antony Stone <Antony.Stone@???> wrote:

> Hi.
>
> I've just installed a couple of Beowulf systems, each of which has
> three ethernet interfaces; one on the motherboard, and two on a PCI
> card.
>
> I'm trying to work out how to give those interfaces the names I want;
> the motherboard as eth0, and the PCI card as eth1 / eth2.
>
> Historically, I've been used to udev
> and /etc/udev/rules.d/70-persistent- net.rules doing this, where I
> can specify the name I want for each interface according to its MAC
> address.
>
> The file didn't exist (although the directory did) on my Beowulf
> system, so I created one with the appropriate contents, and I now get
> messages while the kernel is booting:
>
> udevd[441]: Error changing net interface name eth2 to eth0: File
> exists udevd[441]: could not rename interface '4' from 'eth2' to
> 'eth0': File exists udevd[438]: Error changing net interface name
> eth1 to eth2: File exists udevd[438]: could not rename interface '3'
> from 'eth1' to 'eth2': File exists udevd[445]: Error changing net
> interface name eth0 to eth1: File exists udevd[445]: could not rename
> interface '2' from 'eth0' to 'eth1': File exists
>
> I've followed the entire thread on this list from July 2018 about
> this, which I've found _some_ of in the archives at
> https://lists.dyne.org/lurker/message/20180715.200323.7a2473a2.en.html
> however that link shows only a very small proportion of the emails in
> the discussion for some reason (I have my own local copy in my mail
> client).
>
> According to https://wiki.debian.org/NetworkInterfaceNames the old 70-
> persistent-net.rules system _should_ still work in Buster / Beowulf,
> but I can't work out how to get it to do so.
>
> I _have_ tried adding "net.ifnames=0" to the kernel boot line; this
> makes no difference.
>
> So:
>
> 1. how can I get 70-persistent-net.rules to carry on working under
> Beowulf?
>
> 2. what's the "correct" way to get my interfaces named the way I
> want, according to their MAC addresses, under Beowulf?
>
> (The above Debian wiki document indicates that Buster is the last
> release which will continue to support this, so I'm assuming I'll
> need to do something else for Chimaera; what is it?)
>
>
> Thanks,
>
>
> Antony.
>

Hi,
You can:

1) delete the persistent net names file and get the interfaces with
     old style names but eventually reordered (with net.ifnames=0).

2) use a new net persistent names file using mac address or pci bus (use lspci to get it):

SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:00:00:00:00:ea", ATTR{type}=="1", KERNEL=="?*", NAME:="eth0"
SUBSYSTEM=="net", ACTION=="add", DRIVERS=="?*", ATTR{address}=="00:00:00:00:00:eb", ATTR{type}=="1", KERNEL=="?*", NAME:="eth1"

or

SUBSYSTEM=="net", ACTION=="add", KERNELS=="0000:01:00.0", NAME:="eth0"
SUBSYSTEM=="net", ACTION=="add", KERNELS=="0000:01:00.1", NAME:="eth1"

Ciao,
Tito