Broadband Related > ADSL Issues
Hey kitz, latency on demand
guest:
Remember once upon a time I had a very dodgy Zen connection with latency in the thousands of milliseconds whenever traffic was put on the line?
Well look what I've found :
Tracing route to www.bbc.net.uk [212.58.251.202]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms 192.168.16.2
2 1 ms 1 ms 1 ms 192.168.1.1
3 21 ms 20 ms 20 ms btdhg558-hg2.ealing.broadband.bt.net [217.47.133.201]
4 21 ms 19 ms 20 ms 217.47.133.161
5 21 ms 20 ms 20 ms 217.47.133.234
6 26 ms 21 ms 20 ms 217.47.219.34
7 21 ms 21 ms 20 ms 217.41.168.25
8 21 ms 21 ms 21 ms 217.41.168.66
9 22 ms 21 ms 21 ms 217.41.168.78
10 21 ms 21 ms 20 ms 217.41.168.54
11 21 ms 20 ms 20 ms 217.47.87.113
12 23 ms 22 ms 21 ms core2-pos1-0-0-0.telehouse.ukcore.bt.net [194.74.65.121]
13 22 ms 21 ms 22 ms core1-pos5-0-0.telehouse.ukcore.bt.net [194.74.65.122]
14 22 ms 21 ms 22 ms 194.74.65.6
15 23 ms 27 ms 22 ms 212.58.238.129
16 23 ms 22 ms 21 ms 212.58.239.58
17 22 ms 23 ms 23 ms www2.telhc.bbc.co.uk [212.58.251.202]
Trace complete.
Tracing route to www.bbc.net.uk [212.58.253.73]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms 192.168.16.2
2 1 ms 1 ms 1 ms 192.168.1.1
3 2286 ms 2410 ms * btdhg558-hg2.ealing.broadband.bt.net [217.47.133.201]
4 2021 ms 1985 ms 2270 ms 217.47.133.130
5 2388 ms 2060 ms 1943 ms 217.47.133.238
6 2412 ms 2527 ms * 217.47.219.34
7 2385 ms * 2051 ms 217.41.168.25
8 2342 ms 2503 ms * 217.41.168.66
9 2082 ms 2316 ms 2505 ms 217.41.168.78
10 2036 ms 1989 ms 2269 ms 217.41.168.46
11 2507 ms 2035 ms 1967 ms 217.47.70.114
12 2413 ms 2502 ms 2363 ms core2-pos1-0-0-0.telehouse.ukcore.bt.net [194.74.65.121]
13 2011 ms 2013 ms 2316 ms core1-pos5-0-0.telehouse.ukcore.bt.net [194.74.65.122]
14 2528 ms 2536 ms 2036 ms 194.74.65.6
15 2226 ms 2362 ms 2490 ms 212.58.238.129
16 1964 ms 2106 ms 2523 ms te12-1.hsw0.cwwtf.bbc.co.uk [212.58.239.222]
17 2503 ms 2059 ms 2011 ms www4.cwwtf.bbc.co.uk [212.58.253.73]
Trace complete.
Tracing route to www.bbc.net.uk [212.58.253.73]
over a maximum of 30 hops:
1 <1 ms <1 ms <1 ms 192.168.16.2
2 1 ms 1 ms 1 ms 192.168.1.1
3 20 ms 20 ms 20 ms btdhg558-hg2.ealing.broadband.bt.net [217.47.133.201]
4 20 ms 20 ms 19 ms 217.47.133.162
5 22 ms 21 ms 20 ms 217.47.133.238
6 116 ms 212 ms 72 ms 217.47.219.34
7 21 ms 20 ms 20 ms 217.41.168.25
8 20 ms 21 ms 21 ms 217.41.168.66
9 21 ms 21 ms 21 ms 217.41.168.78
10 22 ms 21 ms 21 ms 217.41.168.46
11 20 ms 20 ms 21 ms 217.47.70.114
12 22 ms 22 ms 22 ms core2-pos1-0-0-0.telehouse.ukcore.bt.net [194.74.65.121]
13 21 ms 21 ms 22 ms core1-pos5-0-0.telehouse.ukcore.bt.net [194.74.65.122]
14 21 ms 21 ms 21 ms 194.74.65.6
15 23 ms 21 ms 21 ms 212.58.238.129
16 24 ms 23 ms 23 ms te12-1.hsw0.cwwtf.bbc.co.uk [212.58.239.222]
17 25 ms 24 ms 23 ms www4.cwwtf.bbc.co.uk [212.58.253.73]
Trace complete.
The middle trace was taken while downloading part of SP3 with the line maxed out at 60kB/s or so. Totally repeatable.
This line is an original 512kbps engineer install. I'm not kidding. There is a Voyager 240 somewhere but nobody knows where :lol: Basically there's some old Telkonet ethernet over mains setup with a load of switches (ancient ones) providing local ethernet ports. This arrangement goes throughout the building(s) so the router could quite literally be anywhere. Ditto master socket. Nobody has a scooby :lol:
The line has 14.5dB downstream attenuation and 11dB upstream. Noise margins indicate that the router is probably on an extension (deep joy) but even so this line is capable of much more than 512kbps. The exchange has Be and UKO present.
The hunt goes on :lol:
kitz:
Good luck playing Hunt the Router. :'(
Hmmm Interesting traces - same exchange as yours?
Old 512kb account never upgraded - Therefore possible early adapter and possible same DSLAM? Although I thought you had a lift and shift or could Zen not get them to do that in the end?. As mentioned to you in eons ago some old DSLAMs couldnt cope very well with differentation of services, but most (if not all) were supposed to have been upgraded by BT.
And if anyone wonders what rizla is on about the latency is much higher than you would normally expext to see despite the line maxing out and an ongoing problem that he had until he moved to LLU. :(
As a comparison this is a tracert
1) Without downloading
Tracing route to bbc.co.uk [212.58.224.131]
over a maximum of 30 hops:
1 8 ms 99 ms 99 ms 192.168.1.254
2 * * * Request timed out.
3 19 ms 18 ms 17 ms 10.1.2.1
4 15 ms 15 ms 15 ms 83.245.126.93
5 15 ms 15 ms 15 ms 212.58.238.129
6 15 ms 14 ms 14 ms rdirwww-vip.thdo.bbc.co.uk [212.58.224.131]
2) Whilst maxing a line out at 23.75 Mbps*
Tracing route to bbc.co.uk [212.58.224.131]
over a maximum of 30 hops:
1 36 ms 103 ms 99 ms 192.168.1.254
2 * * * Request timed out.
3 * * 52 ms 10.1.2.1
4 39 ms 43 ms 45 ms 83.245.126.93
5 39 ms 37 ms 42 ms 212.58.238.129
6 53 ms 42 ms 41 ms rdirwww-vip.thdo.bbc.co.uk [212.58.224.131]
*No thats not a mistake - I just downloaded 6.29 GB in 4 minutes. :o
guest:
Different exchange.
6.29GB in 4 minutes? I think you mixed up bytes and bits ;)
mr_chris:
Have to say it does sound more like 6.29 GigaBITS downloaded in 4 minutes. Although we did work out one time that Kitz can download about 2GB in 10 minutes, which is still very impressive!
Probably just a simple mistake like the totals in DU meter being set to Bits rather than Bytes... and Kitz glancing at them whilst typically doing 20 other things!
kitz:
>> 6.29GB in 4 minutes? I think you mixed up bytes and bits
Sorry probably my mistake - I took the download from Grabbit as to how long it took to download a pile of files whilst performing the traces. I didnt really want the files so didnt keep them, so possibly was Gb.
Bear in mind I only had 1 hour sleep last night since I had to get up at 3am to take the brat to the station... and Ive been up since then :D
But for sure and without a doubt the 23.75 Mbps shown on DUMeter was definite.
I think my jaw still drops at my download speeds... and I can still sync at 24Mbps... will see what happens though when I go for Annex M
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