[Make-wifi-fast] Bufferbloat on Norwegian train wifi

Toke Høiland-Jørgensen toke at redhat.com
Mon Jun 22 08:51:09 EDT 2020

> I've always noticed that the wireless network on Norwegian Vy trains
> around Oslo can be close to useless with page load time in excess of
> 10 seconds and frequent timeouts. That's why I decided to bring along
> the laptop to run an RRUL BE test, and the results are, as expected,
> pretty terrible. Mind you, I ran this test while the train was in a
> tunnel, but I don't think that should matter all that much since
> there's good 4G service in the tunnel.
> I've attached the flent data file. Average ping is around 800 ms at
> the highest, while ICMP spikes above 1000 ms at the highest. I get
> well below 1 Mbps of download bandwidth, and the upload bandwidth is
> considerably higher but quite variable at 3 to 15 Mbps.

Yeah, that seems pretty bad. Although my personal record for bloat on a
train was around ~30 seconds ;)

Guess you could try complaining to the operator, but it may be difficult
to get hold of anyone with enough of a clue to actually do something
about this. And since the service is likely to be oursourced, you'll
need to get the train operator to apply pressure to the company
providing the service to get them to care. Tried to get Icomera (the
company providing the internet in Swedish and German trains, among
others) to care about bufferbloat some years back; but was totally
unsuccessful :/


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