UBR saturated - nice job NTL - Page 2

IanUK · 11-12-2005, 16:53

Its back to normal again now, I'll call them tomorrow, I've had enough of ringing NTL for this week (having a nightmare with them over lots of issues this week, this being just one of them - when things go wrong they really are awful)

Doofy · 11-12-2005, 16:59

Same here in NE Lincs area spent more time on the phone to tech support i think i might be invited to the staff xmas party

,looks like i am going to have to do the same as the last time this plagued me. Keep ringing and evebtually someone will take notice last time they waived the bill for 3 months till the prob was sorted

Chrysalis · 11-12-2005, 19:02

Leics is saturated pretty bad at ubr level here, ignition you have been mentioning how ntl have apperently got a better network then telewest but it doesnt show here.

Sun, 11 Dec 2005 18:08:38 UTC

1st 512K took 3219 ms = 159.1 KB/sec, approx 1311 Kbps, 1.28 Mbps
2nd 512K took 2531 ms = 202.3 KB/sec, approx 1667 Kbps, 1.63 Mbps
3rd 512K took 2500 ms = 204.8 KB/sec, approx 1688 Kbps, 1.65 Mbps
4th 512K took 2078 ms = 246.4 KB/sec, approx 2030 Kbps, 1.98 Mbps

Overall Average Speed = approx 1674 Kbps, 1.64 Mbps

I did it 3 times and only had 1 out of 12 spike to 7mbit.

BBKing · 11-12-2005, 19:37

Quote:

Leics is saturated pretty bad at ubr level

Pretty sweeping statement. Have you checked every single CMTS in Leicester, at up to 8 CMTS per UBR and 12 UBRs in Leicester now (six more in the last year , by my reckoning).

Quote:

seems, I've had no service for TV or Broadband for most of the week

If it's affecting TV it isn't UBR congestion. Period. PM me your modem's MAC address and I can take a look at it.

There are no UBRs in Romford, incidentally.

mpmc · 11-12-2005, 19:39

As part of the ongoing project to maintain and upgrade our Broadband network, there is a requirement to carry out maintenance and upgrades on components which may result in a loss of service for the duration.
The following work will be taking place during the week commencing Monday 14th November.
On the morning of Tuesday the 6th of December between midnight and 6 AM,
Network optimisation will result in a loss of service in the Poole, Leicester, Cambridge and surrounding areas.
Network updates will result in a loss of servie in Belfast, Leicester and Manchester.
Network rebalancing across the country will result in a brief loss of service for all customers.
On the morning of Wednesday the 7th of December between midnight and 6 AM,
Network optimisation will result in a loss of service in the Leicester, Waltham Park, Lancing, Bromborough, Coventry, Lichfield, Warwick, Stafford, Glengormley, Bishops Stortford, Coventry, Basford, Guildford and surrounding areas.
On the morning of Thursday the 8th of December between midnight and 6 AM,
Network optimisation will result in a loss of service in the Leicester, Lancing, Rochdale, Baguley, Londonderry, Norwich, Poole, Rochdale, Coventry, Lichfield, Warwick, Stafford, Bishops Stortford, Londonderry, Coventry, Basford, Renfrew and surrounding areas.
On the morning of Friday the 9th of December between midnight and 6 AM,
Network optimisation will result in a loss of service in the Leicester and surrounding areas.
We thank you for your understanding and apologise for any inconvenience these planned works may cause.

That might explain it <_<

IanUK · 11-12-2005, 20:02

LOL, they could probably word that better !

I've PM'd you as requested BBKing - thanks.

---------- Post added at 19:02 ---------- Previous post was at 18:45 ----------

Uhm, I just read Ignitions post about Cable modem signal levels here:
http://www.cableforum.co.uk/board/sh...ad.php?t=26006

and mine seem to be way out of whack, (unless I'm reading them wrong)

NTL250 modem

Downstream receive power: -23.0 dbmv
Downstream snr: 22.8 dbmv

Upstream Transmit Power: 55.0 dbmv

Is that bad ?

BBKing · 11-12-2005, 20:38

Er. Yes. I saw the same myself on your connection and I can honestly say that's about the worst downstream stats I've seen in a good while.

Chrysalis · 12-12-2005, 10:01

bbking I mean just my ubr I dont know what the other 11 are like

The speed was to paul's speedtest site and it got faster a few hours later so if it wasnt the ubr I dont know what else would make it just speed up.

BBking if you know could you answer this please.

Almost every day during the past month or so Leics has "Network optimisation" and the "Network updates" once as above, is this actual upgrades or just tweaking juggling heavy users around etc.

IanUK · 12-12-2005, 10:15

I'm back to sub 5k again this morning, at least I now have a clue as to why

BBKing · 12-12-2005, 12:14

Chrysalis:

You're only on a small part of one UBR, which I can take a look at if you like. Drop me your MAC address via PM.

Network optimisation stuff is generally automatic in turns of juggling users between upstreams to even things out and happens nearly everywhere now fairly often. As I said, there have been six new UBRs gone in recently, and plugging them all in and resegmenting takes a bit of effort too, so you'll see that come up every few weeks too, with consequent interruptions to service for *some* people (many, of course, will see no impact).

Chrysalis · 12-12-2005, 20:00

Ok thanks for your reply, I will pm you the mac, I guess I havent been moved since during all these weeks of maintenance I have not had a single drop.

Chrysalis · 13-12-2005, 10:24

Ok sorry I have sent the mac yet but I was tired and now I am not at home, but please comment on this if you can thanks.

here are 2 traceroutes from other ntl user's

Quote:

1 <1 ms <1 ms <1 ms ipcop.localdomain [10.0.0.1]
2 7 ms 8 ms 7 ms 10.15.16.1
3 10 ms 8 ms 9 ms bagu-t2cam1-b-ge-wan52-121.inet.nt
2.213]
4 8 ms 18 ms 8 ms bagu-t2core-b-ge-wan64.inet.ntl.co
1]
5 9 ms 9 ms 10 ms lee-bb-b-so-200-0.inet.ntl.com [21

6 10 ms 9 ms 10 ms lee-bb-a-ae0-0.inet.ntl.com [62.25
7 14 ms 14 ms 14 ms nth-bb-b-so-000-0.inet.ntl.com [62

8 14 ms 25 ms 13 ms nth-bb-a-ae0-0.inet.ntl.com [62.25
9 17 ms 15 ms 16 ms gfd-bb-b-so-400-0.inet.ntl.com [62
10 34 ms 20 ms 18 ms redb-ic-1-as0-0.inet.ntl.com [213.
11 18 ms 18 ms 18 ms xchangepoint-gw1.aexiomus.net [217
12 18 ms 18 ms 19 ms peer8.rbl-mer.aexiomus.net [80.82.
13 18 ms 17 ms 18 ms 84-45-244-6.no-dns-yet.enta.net [8
14 34 ms 16 ms 18 ms mars.miniserve.net [195.62.28.9]

Quote:

1 7 ms 7 ms 8 ms 10.139.151.254
2 7 ms 7 ms 6 ms lutn-t2cam1-a-v112.inet.ntl.com [80.4.118.5]
3 6 ms 7 ms 8 ms lutn-t2core-a-ge-wan64.inet.ntl.com [213.107.47.89]
4 9 ms 7 ms 8 ms pop-bb-a-so-410-0.inet.ntl.com [213.105.174.61]
5 7 ms 7 ms 10 ms pop-bb-b-ae0-0.inet.ntl.com [213.105.172.77]
6 17 ms 16 ms 16 ms amst-ic-1-as0-0.inet.ntl.com [62.253.188.94]
7 19 ms 28 ms 19 ms ge-amsix.gw-backbone-a.ams.schlund.net [195.69.144.220]
8 27 ms 27 ms 27 ms so-4000.gw-backbone-a.ffm.schlund.net [212.227.120.5]
9 29 ms 29 ms 30 ms so-4000.gw-backbone-a.bs.ka.schlund.net [212.227.120.8]
10 28 ms 28 ms 29 ms a0kac1.gw-distp-a.bs.ka.schlund.net [212.227.116.210]
11 29 ms 30 ms 27 ms pkad1.gw-prtr-r10-a.bs.ka.schlund.net [212.227.34.198]
12 27 ms 28 ms 31 ms p15195557.pureserver.info [82.165.36.206]

note there is hardly any spikes and they are small.

here is one from here (same ubr as my home connection)

1 16 ms 11 ms 10 ms 10.8.143.254
2 52 ms 13 ms 40 ms leic-t2cam1-b-ge914.inet.ntl.com [82.3.35.213]
3 30 ms 8 ms 22 ms leic-t2core-b-ge-220-0.inet.ntl.com [82.3.33.138]
4 15 ms 52 ms 24 ms nth-bb-b-so-230-0.inet.ntl.com [62.253.188.114]
5 13 ms 10 ms 9 ms nth-bb-a-ae0-0.inet.ntl.com [62.253.185.117]
6 57 ms 27 ms 16 ms gfd-bb-b-so-400-0.inet.ntl.com [62.253.185.98]
7 41 ms 14 ms 15 ms redb-ic-1-as0-0.inet.ntl.com [213.105.174.138]
8 16 ms 20 ms 14 ms xchangepoint-gw1.aexiomus.net [217.79.160.25]
9 18 ms 15 ms 15 ms peer8.rbl-mer.aexiomus.net [80.82.128.46]
10 19 ms 17 ms 21 ms 84-45-244-6.no-dns-yet.enta.net [84.45.244.6]
11 33 ms 27 ms 36 ms mars.miniserve.net [195.62.28.9]

Note the massive increase in spikes, now I expect you will tell me that this is due to icmp been last priority but if that is the case then why is it not apperent on ther 2 trace's do they just happen to be lucky and they are going over idle router's at the time of trace. Also I would expect the last hop doesnt have icmp on low priority if its just a unix or windows server and all 3 are spiked (should be around 18ms).

Also the upgrade work in leics if we have say the ubr capacity at 100% in jan 2005 then what is the new capacity now in proportion to that or you cant say due to NDA? Because I feel that the upgrade work in Leics was just catchup work the ubr's were previously saturated on the now very old 1.5mbit service and all it achieved was to make that useable and things were good up until around july this year where it started declining again, and in nov/dec there was a sharp decline in latency. From here it looks like downstream is filled since I can usually max upstream or it could be we at something like 80% where that level might start to affect latency? If my ubr isnt saturated I would at least like to know if its load is higher then ntl's average load around the country. I will try to get the mac to you tonight when I am back at home if not it will be tommorow. Thanks for the help.

---------- Post added at 09:24 ---------- Previous post was at 09:20 ----------

another one which did improve, but still not near the other 2

1 29 ms 9 ms 11 ms 10.8.143.254
2 23 ms 10 ms 9 ms leic-t2cam1-b-ge914.inet.ntl.com [82.3.35.213]
3 14 ms 13 ms 11 ms leic-t2core-b-ge-220-0.inet.ntl.com [82.3.33.138]
4 12 ms 15 ms 12 ms nth-bb-b-so-230-0.inet.ntl.com [62.253.188.114]
5 14 ms 10 ms 11 ms nth-bb-a-ae0-0.inet.ntl.com [62.253.185.117]
6 15 ms 14 ms 14 ms gfd-bb-b-so-400-0.inet.ntl.com [62.253.185.98]
7 28 ms 17 ms 21 ms redb-ic-1-as0-0.inet.ntl.com [213.105.174.138]
8 20 ms 18 ms 15 ms xchangepoint-gw1.aexiomus.net [217.79.160.25]
9 20 ms 15 ms 15 ms peer8.rbl-mer.aexiomus.net [80.82.128.46]
10 18 ms 29 ms 17 ms 84-45-244-6.no-dns-yet.enta.net [84.45.244.6]
11 19 ms 18 ms 24 ms mars.miniserve.net [195.62.28.9]

Simcut · 13-12-2005, 11:05

you should be seeking some kind of compensation for this mate, I had 8/9 months of problems when my local UBR (at the time in Cheshunt) was overloaded, I used to get an upstream of about 10 max.... used to be great, people on the forum will remember well how arsey I used to be, with reason though

The real bugger was that the UBR is based at the bottom of the road from where I work, I felt like going down there and waiting for the next engineer to turn up so I could threaten them :P

uno · 13-12-2005, 21:05

Well im hoping all these new UBRs Leicester is getting means we are going to get a better service and a more stable speed, anybody know a date when all the work on installing the new equipment will be done.

Chrysalis · 13-12-2005, 21:46

The ubr's hes reffering to are done, I have no idea if any more are scheduled.

The mac should be with you in pm by the time you read this bbking.