I'm using network, not NetworkManager. I've got a bridge set up
with my (one and only) ethernet point connected to it. I'm
running fedora 31.

Randomly, when I reboot the system to get a new kernel
or something, dhcp will fail to assign an IP address to
the bridge. I'll reboot again and it will be OK (I have
also been able to do an ifdown/ifup to get an IP addr).

I once found a web page that said STP (spanning tree
protocol) slowed things way down, and with my config
I can't possibly have any loops, so I disable STP. That
did indeed make network startup far more reliable, but
it still sometimes fails.

Does anyone else have this problem? Is there some
magic I can perform to make it reliable? I don't have
this problem when configured with a static IP, but they
were redoing a lot of network infrastructure and
recommended everyone switch to dhcp.

It also seemed very reliable before I created the bridge
(but I need the bridge to run virtual machines).

Working from home, I've now become paranoid about installing
updates that need a reboot for fear I won't be able to get
to the machine again because the network never comes back up.

Maybe I should install a script in rc.local that checks to see
if an IP address was defined, and reboots again if not :-).
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