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Newbie
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Message 1 of 14

Are BT throttling Netflix.com? (my results suggest they are...)

I've been having intermittent issues with Netflix on various devices (wired and wifi). My BT wholesale and speedtest.net results are typically decent (30mpbs down).

Usually Netflix's own speedtest, fast.com reports similar speeds, however recently it's been reporting very low speeds of c.1.4mbps. ***EDIT - I'm now getting 140 Kbps on fast.com on my wired PC. At the same time I'm getting 29Mbps on my EE 4g phone.....***

Assuming this was a fast.com issue I tried fast.com from my EE 4g mobile and got 40mbps

Other than BT throttling or traffic shaping (which is odd, due to it being 07:30 in the morning!!) can anyone explain what's going on?

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13 REPLIES 13
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Newbie
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Message 2 of 14

Re: Are BT throttling Netflix.com? (my results suggest they are...)

Hmmm, it may not be throttling - a tracert from my router to fast.com/184.30.112.32 shows an abysmal latency.... some of those hops are 100+ ms !!!!

3 31.55.187.176 (31.55.187.176) 26.807 ms 31.55.187.180 (31.55.187.180) 27.082 ms 28.340 ms
4 core2-hu0-17-0-5.southbank.ukcore.bt.net (195.99.127.190) 27.070 ms 213.121.192.134 (213.121.192.134) 27.283 ms host213-121-192-114.ukcore.bt.net (213.121.192.114) 26.826 ms
5 peer7-et-4-0-5.telehouse.ukcore.bt.net (194.72.16.130) 27.395 ms peer7-et-3-1-6.telehouse.ukcore.bt.net (109.159.252.234) 33.069 ms peer7-et-0-0-5.telehouse.ukcore.bt.net (109.159.252.184) 29.105 ms
6 166-49-128-32.eu.bt.net (166.49.128.32) 25.674 ms 25.544 ms 25.858 ms
7 ldn-b1-link.telia.net (213.248.97.48) 28.600 ms 27.043 ms 27.111 ms
8 ldn-bb4-link.telia.net (62.115.143.26) 118.168 ms ldn-bb3-link.telia.net (62.115.114.234) 118.092 ms *
9 * nyk-bb4-link.telia.net (62.115.113.20) 122.219 ms *
10 ash-bb4-link.telia.net (62.115.136.201) 106.863 ms ash-bb3-link.telia.net (62.115.141.244) 105.357 ms ash-bb4-link.telia.net (62.115.136.201) 106.260 ms
11 atl-b22-link.telia.net (62.115.125.191) 119.824 ms 122.830 ms 118.081 ms
12 akamai-ic-315258-atl-bb1.c.telia.net (213.248.102.234) 116.339 ms 122.785 ms 125.871 ms
13 * * *
14 * * *
15 * * *
16 * * *
17 * * *
18 * * *
19 * * *
20 * * *
21 * * *
22 * * *
23 * * *
24 * * *
25 * * *
26
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Sage
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Message 3 of 14

Re: Are BT throttling Netflix.com? (my results suggest they are...)

I too get latency in the 100's to fast.com and that's with a different ISP. What does a tracert to bbc.co.uk give you?

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Newbie
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Message 4 of 14

Re: Are BT throttling Netflix.com? (my results suggest they are...)

Hi, thanks for the reply.

Still pretty lousy:

traceroute to 212.58.226.75 (212.58.226.75), 30 hops max, 38 byte packets
1 * * *
2 * * *
3 31.55.187.184 (31.55.187.184) 32.460 ms 31.55.187.180 (31.55.187.180) 34.384 ms 31.55.187.184 (31.55.187.184) 37.669 ms
4 core1-hu0-8-0-5.southbank.ukcore.bt.net (195.99.127.178) 47.071 ms core1-hu0-2-0-3.southbank.ukcore.bt.net (195.99.127.26) 45.991 ms host213-121-192-114.ukcore.bt.net (213.121.192.114) 53.180 ms
5 peer7-et-4-0-2.telehouse.ukcore.bt.net (194.72.16.124) 52.583 ms peer7-et-0-1-2.telehouse.ukcore.bt.net (109.159.252.176) 49.491 ms peer8-et-3-1-5.telehouse.ukcore.bt.net (109.159.252.238) 50.649 ms
6 109.159.253.13 (109.159.253.13) 50.524 ms 76.443 ms 44.515 ms
7 * * *
8 * * *
9 132.185.249.7 (132.185.249.7) 28.018 ms 27.681 ms 28.791 ms
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15

Seems way too many hops (with a 40+ ms latency) for UK backbone traffic....

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Highlighted
Sage
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Message 5 of 14

Re: Are BT throttling Netflix.com? (my results suggest they are...)

Are you running tracert on a wired or wireless connection?

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Newbie
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Message 6 of 14

Re: Are BT throttling Netflix.com? (my results suggest they are...)

Am running directly from my Asus router since Win10 blocks ICMP...

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Sage
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Message 7 of 14

Re: Are BT throttling Netflix.com? (my results suggest they are...)

What do you get for a tracert to the bbc with this IP 151.101.64.81 ? Which DNS are you using?

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Newbie
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Message 8 of 14

Re: Are BT throttling Netflix.com? (my results suggest they are...)

The DNS is set to BT default (eg undefined in my ASUS router)

That IP is better:

traceroute to 151.101.64.81 (151.101.64.81), 30 hops max, 38 byte packets
1 * * *
2 * * *
3 31.55.187.188 (31.55.187.188) 26.802 ms 31.55.187.184 (31.55.187.184) 26.253 ms 28.321 ms
4 core2-hu0-17-0-1.southbank.ukcore.bt.net (195.99.127.188) 25.607 ms host213-121-192-96.ukcore.bt.net (213.121.192.96) 26.578 ms host213-121-192-116.ukcore.bt.net (213.121.192.116) 27.361 ms
5 194.72.16.216 (194.72.16.216) 29.031 ms peer7-et-0-0-5.telehouse.ukcore.bt.net (109.159.252.184) 27.010 ms 194.72.16.66 (194.72.16.66) 28.850 ms
6 * * *
7 * * *
8 * * *
9 * * *
10 * * *
11 * * *
12 * * *
13 * * *
14 * * *
15 * * *
16 * * *
17 *



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Highlighted
Sage
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Message 9 of 14

Re: Are BT throttling Netflix.com? (my results suggest they are...)

Looks like it could be a DNS problem. I wouldn't use any ISP DNS. I find the following works well.

Primary 1.1.1.1 (Cloudflare)

Secondary 8.8.4.4 (Google)

Give it a try and see if you get better results.

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Newbie
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Message 10 of 14

Re: Are BT throttling Netflix.com? (my results suggest they are...)

I tried the 1.1.1.1 DNS - still getting VERY slow Netflix speeds (see below)

 

 

BT 30Mpbs BroadbandBT 30Mpbs BroadbandEE 4gEE 4g

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