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On Thu, 19 May 2022 19:58:09 +0200
Simone Piccardi via pve-user <[email protected]> wrote:
> Hi, I have a very strange networking problem on a Proxmox server,
> emerged after upgrading from 6.4 to 7.
I have no idea if this can have something to do with it, but not a very
long time ago I had two Dell R210 servers connected through a simple
failover bond0. The issue I found was that somehow these bond0 devices
on two *different* servers got the *same* fixed MAC address. After some
searching I stumbled upon this:
https://blog.sigterm.se/posts/a-bonding-exercise/
I had some discussion afterward with Patrik and I ended up in adding a
fixed MAC address in the /etc/network/interfaces stanza, e.g.:
hwaddress ether 4a:89:66:60:e4:97
I just want to notify this phenomena because you can get the most weird
behaviour if you have two devices having the same MAC. I tested loading
the bonding on some workstations:
modprobe -v bonding
ip link show bond0
and see what address it gets, it depends on this value:
cat /sys/class/net/bond0/addr_assign_type
which me be different from host to host.
To remove the module:
modprobe -rv bonding
I had no time to dive deeper into this matter, I just worked around it
by adding the "hwaddress ether" in the bond0 stanza. This works fine.
My 2cts,
R.
--
richard lucassen
http://contact.xaq.nl/
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