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deleted
(deleted) Sat 12-May-18 11:18:28

Infinity 4 Throttling and Congestion

[link to this post]

Moved to a new place this week that has FTTP - yippee!

Despite being a new build though it only has up to Infinity 4, not Ultrafast 1 or 2.

The engineer was meant to arrive this week to install it but - surprise surprise - was a no show. BT called later in the day to say it 'fell through the system', and couldn't even reschedule because the appointment booker wasn't working. Anyway...

I connected the BT Hub myself and surprisingly it works. Not sure why an engineer was needed. Over the first 24 hours the speeds steadily increased from 20 Mbps to 50 to 100 and then finally to a fairly consistent 240 Mbps and up. Uploads are a solid 30 Mbps despite Infinity 4 in theory being only 20.

But since then the speeds have been all over the place and the speed graphs scream to me "throttling!". They look just like I used to get from Virgin cable in a horribly congested street. Screenshots: https://cl.ly/0j3E0w2E0q0g https://cl.ly/2L112N3C3T3Z

In the evenings I frequently can't do better than 50 Meg - barely enough for 4K HDR movies from iTunes.

The building is a large apartment block. Probably 300+ units. Is this just the reality of FTTP? Extremely disappointing if so.

(Yes I'll get BT on the case but at the moment they can't even figure out how to get an engineer to show up!)

Edited by deleted (Sat 12-May-18 11:29:47)

Zarjaz
(eat-sleep-adslguide) Sat 12-May-18 11:25:32

Re: Infinity 4 Throttling and Congestion

[re: deleted] [link to this post]

I believe Infinity 4 is 330/30.

How are you connecting to run these tests, if by wifi then this isn't a good/accurate method.

Can you run some trace routes to see where this throttling and congestion is occurring ?

Zarjaz - "Yeah, well, that's just like, your opinion, man"

Edited by Zarjaz (Sat 12-May-18 11:26:52)

deleted
(deleted) Sat 12-May-18 11:45:04

Re: Infinity 4 Throttling and Congestion

[re: Zarjaz] [link to this post]

That's right, in theory it is profiled at 330/30 but they sell it as 300/20.

The results are the same whether on ac Wi-Fi, or connected directly via Ethernet (Cat 5e and better), whether using the BT Hub as a router, or replacing it with my Linksys Velop (which I only did to see if it would fix the issue - though I'd prefer to keep it anyway, can't stand BT Hubs). It always bursts to near the expected speed and then appears to throttle like hell.

[The Velop also has the ability to run speedtest.net tests itself (i.e. cabled speed to the router) and the results are just the same. I wish it was just Wi-Fi issues!]

I thought FTTP was meant to be rock solid. I'd prefer 100 megs reliably than 50-250 based on the time of day

Currently using the Velop as you can see in the below trace route (which doesn't seem to indicate a problem) but the problems persist whatever I use.

I've rebooted the modem.

Text

Traceroute has started�
 traceroute to 8.8.8.8 (8.8.8.8), 64 hops max, 72 byte packets
 1  linksys08769 (192.168.1.1)  3.739 ms  2.043 ms  1.273 ms 2  * * *
 3  31.55.186.197 (31.55.186.197)  7.265 ms  3.705 ms  3.889 ms 4  31.55.186.204 (31.55.186.204)  4.571 ms  4.597 ms  5.119 ms
 5  195.99.127.90 (195.99.127.90)  6.030 ms  4.803 ms  5.057 ms 6  peer2-et-2-3-0.redbus.ukcore.bt.net (62.172.103.37)  5.878 ms  6.005 ms  7.408 ms
 7  109.159.253.93 (109.159.253.93)  6.096 ms  7.084 ms  5.943 ms 8  * * *
 9  64.233.175.154 (64.233.175.154)  7.743 ms  6.104 ms  5.191 ms10  108.170.230.157 (108.170.230.157)  5.964 ms  6.593 ms  6.012 ms
11  google-public-dns-a.google.com (8.8.8.8)  5.013 ms  4.829 ms  4.828 ms 
 Traceroute has started�
 traceroute to 8.8.4.4 (8.8.4.4), 64 hops max, 72 byte packets
 1  linksys08769 (192.168.1.1)  2.457 ms  1.158 ms  2.165 ms 2  * * *
 3  31.55.186.193 (31.55.186.193)  6.477 ms  4.649 ms  5.000 ms 4  31.55.186.212 (31.55.186.212)  5.032 ms  4.913 ms  4.495 ms
 5  host213-121-192-52.ukcore.bt.net (213.121.192.52)  4.672 ms  6.087 ms  4.804 ms 6  peer7-et-3-0-0.telehouse.ukcore.bt.net (62.6.201.212)  4.761 ms  4.869 ms  5.289 ms
 7  109.159.253.185 (109.159.253.185)  4.867 ms  6.060 ms  4.933 ms 8  * * *
 9  216.239.46.12 (216.239.46.12)  9.057 ms  8.240 ms  6.194 ms10  108.170.230.163 (108.170.230.163)  7.562 ms  6.726 ms  6.530 ms
11  google-public-dns-b.google.com (8.8.4.4)  5.086 ms  5.788 ms  6.357 ms 
 Traceroute has started�
 traceroute to 1.1.1.1 (1.1.1.1), 64 hops max, 72 byte packets
 1  linksys08769 (192.168.1.1)  4.839 ms  5.170 ms  7.273 ms 2  * * *
 3  31.55.186.197 (31.55.186.197)  5.448 ms  3.782 ms  3.555 ms 4  31.55.186.232 (31.55.186.232)  4.847 ms  3.617 ms  4.635 ms
 5  195.99.127.108 (195.99.127.108)  4.813 ms  4.579 ms  4.872 ms 6  peer5-hu0-12-0-0.telehouse.ukcore.bt.net (213.121.193.185)  6.112 ms  4.968 ms  6.081 ms
 7  195.99.126.1 (195.99.126.1)  9.696 ms  4.622 ms  6.761 ms 8  1dot1dot1dot1.cloudflare-dns.com (1.1.1.1)  4.184 ms  4.432 ms  4.879 ms

Here's an even better screenshot of the current throttling: https://cl.ly/2k1K12272H3Q

Zarjaz
(eat-sleep-adslguide) Sat 12-May-18 11:49:20

Re: Infinity 4 Throttling and Congestion

[re: deleted] [link to this post]

OK, so you seem to have ruled the usual suspects ...

Have you spoken to any of your neighbours to see if they are experiencing similar issues ?

Zarjaz - "Yeah, well, that's just like, your opinion, man"

PaulKirby
(knowledge is power) Sat 12-May-18 11:49:26

Re: Infinity 4 Throttling and Congestion

[re: Zarjaz] [link to this post]

In reply to a post by Zarjaz:
I believe Infinity 4 is 330/30.

I think its 300Mbps down and 20Mbps up, so BT told me.

Paul

BTBroadband - Ultrafast 2 + FVA
Exchange Name: Ilford Central (LNILC) Cabinet: 24
TBB Speedtest IPv4 | TBB Speedtest IPv6 | Ookla Speedtest | Linksys WRT 3200 ACM (BQM)

deleted
(deleted) Sat 12-May-18 12:05:18

Re: Infinity 4 Throttling and Congestion

[re: Zarjaz] [link to this post]

The neighbours are not the technical type... it's only obsessives like me who verify the speeds! tongue

That said I did see a chap a few floors down picking up an Intel processor from the mail room - he seems like the type that would keep an eye on these things, hopefully I will bump into him again.

In the meantime, does FTTP work the same as FTTC in terms of profiling? Will turning the modem off (which you can only do by pulling the plug due to the battery backup) be detected as a line error and cause it to profile down?

With the speeds hovering at around 150 it could be that I've been profiled at 152 Mbps, i.e. Infinity 3.

I would have a look what the profile is however the BT Wholesale checker has no trace of an FTTP connection at my address (or any address in the building for that matter). Useless.

PaulKirby
(knowledge is power) Sat 12-May-18 12:07:14

Re: Infinity 4 Throttling and Congestion

[re: deleted] [link to this post]

What exchange are you on, when we were on Infinity 4 we were getting ~310Mbps down and a solid 32Mbps up.

Ours only went down in the evenings where it would normally drop down to about 200Mbps (around 6pm to 10pm), only once did it drop down to 45Mbps.

This time of the day you should be getting your max speed or very close to it.

I just did a SpeedOfMe Test and got >> this <<<.

Also it shouldn't be the case of it starting at 20Mbps then 50, 100 and then 240, something isn't right.

The sad thing is BT won't class this as an issue until it goes below 45Mbps (on Infinity 4) when they do their checks.

Paul

BTBroadband - Ultrafast 2 + FVA
Exchange Name: Ilford Central (LNILC) Cabinet: 24
TBB Speedtest IPv4 | TBB Speedtest IPv6 | Ookla Speedtest | Linksys WRT 3200 ACM (BQM)

deleted
(deleted) Sat 12-May-18 12:11:18

Re: Infinity 4 Throttling and Congestion

[re: PaulKirby] [link to this post]

According to the dslchecker.bt.com address checker I'm on the Mile End exchange but I can't check using the telephone number checker as the number still isn't on the system.

PaulKirby
(knowledge is power) Sat 12-May-18 12:11:49

Re: Infinity 4 Throttling and Congestion

[re: deleted] [link to this post]

In reply to a post by Brookzy:
In the meantime, does FTTP work the same as FTTC in terms of profiling? Will turning the modem off (which you can only do by pulling the plug due to the battery backup) be detected as a line error and cause it to profile down?

No, when you connect you connect up at the speed that you are paying for, however due to congestion you might not get your speed.

It might not be this, but you never know, but your fibre might have a bad joint on it, not too sure if a bad joint causes latency issues (due to your latency seems fine), but I think it does cause speed issues.

Paul

BTBroadband - Ultrafast 2 + FVA
Exchange Name: Ilford Central (LNILC) Cabinet: 24
TBB Speedtest IPv4 | TBB Speedtest IPv6 | Ookla Speedtest | Linksys WRT 3200 ACM (BQM)

PaulKirby
(knowledge is power) Sat 12-May-18 12:14:53

Re: Infinity 4 Throttling and Congestion

[re: deleted] [link to this post]

In reply to a post by Brookzy:
According to the dslchecker.bt.com address checker I'm on the Mile End exchange but I can't check using the telephone number checker as the number still isn't on the system.

Ah, your down the road from me, I am on Ilford Central.

Did your phone get moved over to fibre as well, i.e. on the ONT is the TEL1 light on?
If so you have FVA (Fibre Voice Access) and no checker will know your number due to its no longer a PSTN number.

Our phone number is the same due to it also being on FVA.

BTW what cabinet did it say you was on?

Paul

BTBroadband - Ultrafast 2 + FVA
Exchange Name: Ilford Central (LNILC) Cabinet: 24
TBB Speedtest IPv4 | TBB Speedtest IPv6 | Ookla Speedtest | Linksys WRT 3200 ACM (BQM)

Edited by PaulKirby (Sat 12-May-18 12:18:57)

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