slow/unreliable connection speeds - Brighton area

bomber · 27-12-2003, 16:36

Merry Xmas guys and gals!

OK, heres the score. I'm down for Xmas at mates in Brighton and yesterday I
connected/registered/installed his new NTL 600k BB service. The speed is absolutely unreliable.....ranging from anywhere between 5 to 50 kbytes!!! Also, we have to keep rebooting the bloody STB all the time.

Before I adivise him on calling CS, I just wondered if any other Brighton 'belles' are having the same terrible performance. His laptop is well within spec. Here are some other details:

Connection method = Ethernet > STB
STB = DITV-1000

I'll post any other network stats if you like, once I know what will be useful for anyone. Thanks in advance.

Bomber

27-12-2003, 20:33

Mines the same here in PEterborough, Just been on the phone with Tech support for the past hour and they say there is nothing wrong on their side. I restored PC back 10 days as i know it was working fine on 24/12 but still doesnt work and tech support have given up now.

Is Brighton in the Southampton area of the network as theres a fault there apparently

th'engineer · 27-12-2003, 21:42

Quote:

Originally Posted by bomber

Merry Xmas guys and gals!

OK, heres the score. I'm down for Xmas at mates in Brighton and yesterday I
connected/registered/installed his new NTL 600k BB service. The speed is absolutely unreliable.....ranging from anywhere between 5 to 50 kbytes!!! Also, we have to keep rebooting the bloody STB all the time.

Before I adivise him on calling CS, I just wondered if any other Brighton 'belles' are having the same terrible performance. His laptop is well within spec. Here are some other details:

Connection method = Ethernet > STB
STB = DITV-1000

I'll post any other network stats if you like, once I know what will be useful for anyone. Thanks in advance.

Bomber

whats the SNR and return power like up dwn blue on remote to get STB menu is the middle light solid on STB

BBKing · 28-12-2003, 11:03

What was the first-hop ping time (on a traceroute, look at the row of times in milliseconds for the first return on the trace - assuming you're not using a router when it would be the second).

28-12-2003, 11:33

mine says 60ms

bomber · 28-12-2003, 13:21

SNR on the STB is 31.0 dB (this seems too low surely......)

Here are a few traceroutes to news.bbc.co.uk (which seem a bit incosistent):

Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Bomber>tracert news.bbc.co.uk

Tracing route to newswww.bbc.net.uk [212.58.226.40]
over a maximum of 30 hops:

1 47 ms 19 ms 58 ms 10.64.48.1
2 11 ms 14 ms * brtn-t2cam1-b-ge92.inet.ntl.com [80.3.66.129]
3 11 ms 8 ms 35 ms brtn-t2core-b-ge-wan61.inet.ntl.com [80.3.65.133
]
4 27 ms 18 ms 14 ms pop-bb-b-so-200-0.inet.ntl.com [62.253.188.237]

5 14 ms 16 ms 16 ms pop-bb-a-ae0-0.inet.ntl.com [213.105.172.78]
6 26 ms 14 ms 17 ms tele-ic-2-so-000-0.inet.ntl.com [62.253.185.86]

7 14 ms 37 ms 17 ms 212.58.239.217
8 25 ms 15 ms 13 ms news.bbc.co.uk [212.58.226.40]

Trace complete.

C:\Documents and Settings\Bomber>tracert news.bbc.co.uk

Tracing route to newswww.bbc.net.uk [212.58.226.40]
over a maximum of 30 hops:

1 21 ms 38 ms 13 ms 10.64.48.1
2 11 ms 10 ms 15 ms brtn-t2cam1-b-ge92.inet.ntl.com [80.3.66.129]
3 27 ms 10 ms 10 ms brtn-t2core-b-ge-wan61.inet.ntl.com [80.3.65.133
]
4 16 ms 12 ms 12 ms pop-bb-b-so-200-0.inet.ntl.com [62.253.188.237]

5 * * 18 ms pop-bb-a-ae0-0.inet.ntl.com [213.105.172.78]
6 13 ms 29 ms 19 ms tele-ic-2-so-000-0.inet.ntl.com [62.253.185.86]

7 13 ms 15 ms 16 ms 212.58.239.217
8 29 ms 13 ms 13 ms news.bbc.co.uk [212.58.226.40]

Trace complete.

C:\Documents and Settings\Bomber>tracert news.bbc.co.uk

Tracing route to newswww.bbc.net.uk [212.58.226.30]
over a maximum of 30 hops:

1 13 ms 56 ms 50 ms 10.64.48.1
2 17 ms 12 ms 9 ms brtn-t2cam1-a-ge92.inet.ntl.com [80.3.66.1]
3 10 ms 13 ms 10 ms brtn-t2core-a-ge-wan61.inet.ntl.com [80.3.65.5]

4 10 ms 17 ms 14 ms gfd-bb-a-so-230-0.inet.ntl.com [62.253.188.233]

5 26 ms 11 ms 13 ms gfd-bb-b-ae0-0.inet.ntl.com [213.105.172.6]
6 22 ms 12 ms 14 ms tele-ic-2-so-100-0.inet.ntl.com [62.253.185.74]

7 14 ms 13 ms 11 ms 212.58.239.217
8 14 ms 16 ms 19 ms 212.58.226.30

Trace complete.

Many thanks for any advice guys. Bomber

monkeh · 28-12-2003, 13:33

I am getting DNS errors and sh!*e proxy speeds in Luton.

I have tried every luton proxy and there all bad.
currently using UUnets DNS servers, as they work.

Oh well only have to wait till the 5th for my BT phone line and then 2mb ADSL

monkeh · 28-12-2003, 13:41

Here's a typical trace Nice pings !!!

Tracing route to www.scoobynet.co.uk [217.79.111.23]
over a maximum of 30 hops:

1 403 ms 341 ms 366 ms 172.28.167.254
2 283 ms 288 ms 444 ms lutn-t2cam1-b-ge92.inet.ntl.com [80.4.118.129]
3 484 ms * 584 ms lutn-t2core-b-ge-wan62.inet.ntl.com [213.107.47.205]
4 409 ms * 362 ms nth-bb-b-so-220-0.inet.ntl.com [62.253.188.189]
5 442 ms * 414 ms lee-bb-a-so-600-0.inet.ntl.com [62.253.185.102]
6 420 ms * 267 ms pop-bb-b-so-100-0.inet.ntl.com [62.253.185.238]
7 456 ms * 349 ms tele-ic-1-so-000-0.inet.ntl.com [62.253.185.82]
8 246 ms * 418 ms linx.core1.tchx.lon.uk.griffin.com [195.66.224.38]
9 433 ms 230 ms 247 ms atm1-0.core1.srbp.dby.uk.griffin.com [217.79.96.130]
10 473 ms 267 ms 437 ms 217.79.111.23

Trace complete.

BBKing · 28-12-2003, 14:44

Quote:

Originally Posted by bomber

SNR on the STB is 31.0 dB (this seems too low surely......)

Here are a few traceroutes to news.bbc.co.uk (which seem a bit incosistent):

[B][COLOR=Blue][SIZE=1]Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\Documents and Settings\Bomber>tracert news.bbc.co.uk

Tracing route to newswww.bbc.net.uk [212.58.226.40]
over a maximum of 30 hops:

1 47 ms 19 ms 58 ms 10.64.48.1
2 11 ms 14 ms * brtn-t2cam1-b-ge92.inet.ntl.com [80.3.66.129]
* snipped *

Many thanks for any advice guys. Bomber

SNR is fine, the higher the better in fact, but over 30 is absolutely no problem at all (it should work down to 20 and often does below 20). The trace looks like either you have an application using the net connection without your knowledge (like P2P software, spyware or a virus) or the local area is congested. Not in work for a few days so can't check.

horseman · 30-12-2003, 11:07

Quote:

Originally Posted by BBKing

SNR is fine, the higher the better in fact, but over 30 is absolutely no problem at all (it should work down to 20 and often does below 20). The trace looks like either you have an application using the net connection without your knowledge (like P2P software, spyware or a virus) or the local area is congested. Not in work for a few days so can't check.

Empirically I see probs if return power is high/approaching 58Dbmv and SNR drops to 30Db or below during what I suspect is high thermal stressing on non forced ventilated roadside cabs typically during Summer.
Although having been disconnected from UBR (Ranging failures) during early hours over several (unsupported by CS<g>) weekends prior to XMAS I suspect that despite NTL's apparent recent re-segmentation and UBR upgrades, both Brighton's indigenous and migratory student population<g> probably aggravate the unbalanced upstream loads during XMAS (and other) recesses anyway!

So not sure of the validity/usefulness of comparing a different UBR (&/or upstream)port over several day lag but FWIW here's a 150k Hove UBR port comparison(UBR private IP partially obfuscated and relevant first two hops only listed on subsequent tracing) along with salient extracts from STB User info:

SNR 33db, Return Power 56dbmV, Timers and Pre/Post RS errors are zero.
Diag log indicates "Tuning parameters corrupt" interposed between "Reboot" and "CM operational" entries which appears to be typical on DTVi1000 hardware on these networks.

C:\Documents and Settings\Tony>tracert news.bbc.co.uk

Tracing route to newswww.bbc.net.uk [212.58.226.30]
over a maximum of 30 hops:

1 11 ms 30 ms 7 ms 10.64.2xx.1
2 9 ms 8 ms 21 ms brtn-t2cam1-a-ge95.inet.ntl.com [80.3.66.13]
3 42 ms 8 ms 11 ms brtn-t2core-a-ge-wan61.inet.ntl.com [80.3.65.5]

4 10 ms 11 ms 10 ms gfd-bb-a-so-230-0.inet.ntl.com [62.253.188.233]

5 11 ms 30 ms 11 ms gfd-bb-b-ae0-0.inet.ntl.com [213.105.172.6]
6 12 ms 10 ms 11 ms tele-ic-2-so-100-0.inet.ntl.com [62.253.185.74]

7 13 ms 12 ms 36 ms 212.58.239.217
8 39 ms 13 ms 12 ms 212.58.226.30

Trace complete.

C:\Documents and Settings\Tony>tracert news.bbc.co.uk

Tracing route to newswww.bbc.net.uk [212.58.226.30]
over a maximum of 30 hops:

1 9 ms 11 ms 9 ms 10.64.2xx.1
2 38 ms 30 ms 18 ms brtn-t2cam1-a-ge95.inet.ntl.com [80.3.66.13]

C:\Documents and Settings\Tony>tracert news.bbc.co.uk

Tracing route to newswww.bbc.net.uk [212.58.226.30]
over a maximum of 30 hops:

1 9 ms 9 ms 11 ms 10.64.2xx.1
2 10 ms 8 ms 10 ms brtn-t2cam1-a-ge95.inet.ntl.com [80.3.66.13]

YMMV but HTH,
Good Luck together with the ubiquitous festive greetings - TW