[AusNOG] NBNCo Tails to Plane Seats?

[Mark ZZZ Smith]

----- Original Message -----
From: Mark ZZZ Smith <markzzzsmith at yahoo.com.au>
To: Paul Jones <paul at pauljones.id.au>; Paul Wilkins <paulwilkins369 at gmail.com>; "ausnog at ausnog.net" <ausnog at ausnog.net>
Cc: 
Sent: Sunday, 10 May 2015, 21:19
Subject: Re: [AusNOG] NBNCo Tails to Plane Seats?

<snip>

/ Allowing for 200ms typical RTT from here to the US, to simulate satellite latency on your OpenWRT or similar Linux CPE, add 200ms to your LAN (wifi wlan0) and WAN (pppoe-wan) interfaces (i.e., adding 400ms to the RTT):

root at wndr3800:~# tc qdisc del dev pppoe-wan root
root at wndr3800:~# tc qdisc del dev wlan0 root
root at wndr3800:~# tc qdisc add dev pppoe-wan root netem delay 200ms
root at wndr3800:~# tc qdisc add dev wlan0 root netem delay 200ms


/Actually you should add 300ms each way, the report was just measuring satellite RTT, not satellite + Internet RTT.


// And here's another interesting effect. I have enough ADSL sync to get Netflix videos in HD (around 15Mbps). Even with Netflix set to play HD only (which you can set in Playback settings in the Netflix web interface under Your Account), I have noticed that the first 5 or so seconds of video is lower resolution, after which it improves. I think even with forced HD, Netflix are still measuring my capability to play the HD video.

// After adding the 300ms delay in both directions as above, even when I play a HD video it stays grainy. So Netflix are somehow factoring in latency when it comes to choosing whether to play the video in HD or not, even when there is enough bandwidth available.

// YouTube still plays in HD even with the +600ms added to RTT.

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