Re: network trouble on stretch

[Zenaan Harkness <zenaan@freedbms.net>]

On Sun, Sep 03, 2017 at 06:27:12PM -0400, Fungi4All wrote:
> > From: ghe2001@gmail.com
> > The WiFi works, but the Ethernet doesn"t, and I can"t figure out why.
> > ip addr:
...

> Before you get a long lecture on the merits of long unique names try this:
> 
> Edit your /etc/default/grub change GRUB_CMDLINE_LINUX=”” to :
> GRUB_CMDLINE_LINUX="net.ifnames=0" If the biosdevname is installed you need to add :
> GRUB_CMDLINE_LINUX="net.ifnames=0 biosdevname=0"
> $ sudo update-grub
> $ sudo reboot
> 
> Now check your /dev/interfaces, they should be eth0 and wlan0 and they will stay
> this way.

VERY nice hint - jotted away for future :)

That should hopefully solve the OP's problem. If not, the next step I
would personally take is to:

1) determine which ifnames are which type

2) drop into a terminal and use ip (or ifconfig still?) to manually
   configure each eth dev, one by one, with a static address, and see
   if ping works from another host;
   if not work, then "ifconfig down" or "ip link set $DEVNAME down"
   and try the next one...

This way also means that specific commands are either failing or
succeeding - I know it's lower level, but can make debugging ones
problem a little easier from my oh-so-incredibly-humble experiences
:)

Good luck,