[ale] eth numbering change

[Lightner, Jeffrey]

My experience has been that new NICs generally show up as an increment of all previous NICs.
e.g. if you had only an eth0 the new one would show up as eth1.  If you had eth0, eth1 and eth2 the new one would show up as eth3..

I’ve seen this even when I removed a NIC so that it does not automatically get rid of the eth# used by that NIC even though it is no longer there.

I have seen oddities occur that made me go address udev rules to get rid of old entries and/or reorder/edit entries so the NICs have the eth# I want (including in above removal scenario).


From: ale-bounces at ale.org [mailto:ale-bounces at ale.org] On Behalf Of Brian Stanaland
Sent: Wednesday, February 08, 2017 2:05 PM
To: Atlanta Linux Enthusiasts - Yes! We run Linux!
Subject: [ale] eth numbering change

Hello,
This one has bugged me for a while.

I understand that the numbering of network interfaces can change when adding a network card. What I can't figure out is why it's inconsistent. I have two identical servers, same mobo, same NICs in slot 1, same firmware, etc. I add a NIC in slot 2 on both severs and reboot. Why does one show the new NIC as eth0 and the other shows the new NIC as eth1?

Google only turns up how to set persistence.
--Brian

--
"Anyone who has never made a mistake has never tried anything new." -Albert Einstein
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