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Standard User deleted
(deleted) Mon 16-Jun-14 23:21:39
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Re: What is a good ping time on FTTC? Same as ADSL


[re: XRaySpeX] [link to this post]
 
Thanks.

My pings have increased again, now averaging around 42ms. Getting a bit high.

Edited by deleted (Mon 16-Jun-14 23:35:49)

Standard User wolvesmad
(fountain of knowledge) Tue 17-Jun-14 09:23:02
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Re: What is a good ping time on FTTC?


[re: StephenTodd] [link to this post]
 
How do you tell where BT are routing you?

-

BT BroadbandInfinity 2
Standard User StephenTodd
(experienced) Tue 17-Jun-14 09:51:13
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Re: What is a good ping time on FTTC?


[re: wolvesmad] [link to this post]
 
In reply to a post by wolvesmad:
How do you tell where BT are routing you?

You can't tell for sure, but tracert gives a pretty good idea.

In the tracert below you will see a jump from 7 to 11 between steps 4 and 5, and another jump from 11 to 16 between 8 and 9.
The figures indicate that machines 5..8 are close to each other, but somewhat remote from machines 4 and 9.
The '.sf' in the name of machine 8 suggests Sheffield; and others have talked about significant BT presence there.

Tracert interpretation is tricky because the numbers are not always very accurate.
You often see values for a machine A some way down the route as higher than for a machine B further down the route.
In that case you can assume that A is just slow at responding to tracert requests.
I have often seen this for the first ealing machine, though in this particular tracert the figures look pretty clean.


Tracing route to bbc.co.uk [212.58.246.104]
over a maximum of 30 hops:

  1     1 ms    <1 ms    <1 ms  192.168.1.254
  2     6 ms     5 ms     6 ms  172.16.14.14
  3     *        *        *     Request timed out.
  4     7 ms     7 ms     7 ms  213.120.158.173
  5    12 ms    11 ms    11 ms  212.140.206.82
  6    11 ms    11 ms    11 ms  217.41.169.223
  7    11 ms    11 ms    11 ms  217.41.169.109
  8    12 ms    10 ms    11 ms  acc2-xe-5-2-2.sf.21cn-ipp.bt.net [109.159.251.247]
  9    18 ms    21 ms    16 ms  core1-te0-0-0-7.ealing.ukcore.bt.net [109.159.251.33]
 10    17 ms    16 ms    17 ms  peer2-xe2-0-0.telehouse.ukcore.bt.net [109.159.254.106]
 11    22 ms    24 ms    21 ms  194.74.65.42
 12     *        *        *     Request timed out.
 13    21 ms    20 ms    20 ms  ae0.er01.cwwtf.bbc.co.uk [132.185.254.93]
 14    21 ms    26 ms    22 ms  132.185.255.165
 15    19 ms    21 ms    21 ms  fmt-vip133.cwwtf.bbc.co.uk [212.58.246.104]


--
Moved (with trepidation turned relief) to BT Infinity 2 for upload speed. Happy BE user for several years.


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Standard User kasg
(fountain of knowledge) Tue 17-Jun-14 11:09:08
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Re: What is a good ping time on FTTC?


[re: StephenTodd] [link to this post]
 
You seem to have rather more hops than I do:

Tracing route to bbc.co.uk [212.58.246.103]
over a maximum of 30 hops:

  1    <1 ms    <1 ms     1 ms  dsldevice.lan [192.168.1.2]
  2     9 ms    19 ms     9 ms  lo0-central10.pcl-ag05.plus.net [195.166.128.186]
  3     9 ms     9 ms     9 ms  link-a-central10.pcl-gw01.plus.net [212.159.2.176]
  4     9 ms     9 ms     9 ms  xe-1-2-0.pcl-cr01.plus.net [212.159.0.208]
  5    37 ms    10 ms    10 ms  ae1.ptw-cr01.plus.net [195.166.129.0]
  6    13 ms    13 ms    10 ms  kingston-gw.thdo.bbc.co.uk [212.58.239.6]
  7     *        *        *     Request timed out.
  8    12 ms    11 ms    12 ms  ae0.er01.cwwtf.bbc.co.uk [132.185.254.93]
  9    12 ms    11 ms    11 ms  132.185.255.165
 10    10 ms    10 ms    10 ms  fmt-vip132.cwwtf.bbc.co.uk [212.58.246.103]

Trace complete.


Kevin

plusnet Unlimited Fibre - sync approx 70000/20000 at 450m - BQM
Using OpenDNS
Domains and web hosting with TSOHOST
Standard User StephenTodd
(experienced) Tue 17-Jun-14 12:41:46
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Re: What is a good ping time on FTTC?


[re: kasg] [link to this post]
 
Sadly, yes. I do have rather more hops than ideal.

On your side, almost all your latency is in that first hop.
It looks as if you either have mild interleaving, or are quite a long way from your first point of presence (or concentrator or whatever it is called)

--
Moved (with trepidation turned relief) to BT Infinity 2 for upload speed. Happy BE user for several years.

Edited by StephenTodd (Tue 17-Jun-14 13:57:00)

Standard User deleted
(deleted) Wed 25-Jun-14 01:13:46
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Re: What is a good ping time on FTTC?


[re: StephenTodd] [link to this post]
 
So my HG612 has arrived from eBay and I've unlocked it. I had to leave the house as I'm away tonight. I did take some router stats but the windows were lost when I opened my laptop after arriving at my destination, so I'll post some tomorrow.

My first question however, is can the HG612 somehow increase ping times from my devices? My router and devices were all pinging at 21ms. Now, if I ping directly from the router I'm seeing 21ms, but from my devices, I'm seeing 5-6ms higher, and nothing has changed on the router.

Thanks guys.
Standard User Chrysalis
(legend) Wed 25-Jun-14 15:22:43
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Re: What is a good ping time on FTTC?


[re: deleted] [link to this post]
 
that wont be due to the hg.

Standard User deleted
(deleted) Wed 25-Jun-14 18:01:50
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Re: What is a good ping time on FTTC?


[re: Chrysalis] [link to this post]
 
Thanks, no problem.

Here's the stats anyway, how does this look to you guys? (I've also posted this at Kitz)

# xdslcmd info --pbParams
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 12087 Kbps, Downstream rate = 51204 Kbps
Bearer: 0, Upstream rate = 11999 Kbps, Downstream rate = 43225 Kbps

Discovery Phase (Initial) Band Plan
US: (7,32) (871,1205) (1972,2782)
DS: (33,859) (1216,1961) (2793,3970)
Medley Phase (Final) Band Plan
US: (7,32) (871,1205) (1972,2644)
DS: (33,859) (1216,1961) (2793,3408)
VDSL Port Details Upstream Downstream
Attainable Net Data Rate: 12087 kbps 51204 kbps
Actual Aggregate Tx Power: 7.0 dBm 12.6 dBm
====================================================================================
VDSL Band Status U0 U1 U2 U3 U4 D1 D2 D3
Line Attenuation(dB): 6.9 35.5 53.5 N/A N/A 16.8 43.6 67.8
Signal Attenuation(dB): 6.9 34.6 51.9 N/A N/A 25.0 43.2 68.6
SNR Margin(dB): 6.0 6.1 6.1 N/A N/A 6.9 6.9 6.9
TX Power(dBm): 0.0 -7.4 5.6 N/A N/A 9.9 7.8 3.8
# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 12080 Kbps, Downstream rate = 51204 Kbps
Bearer: 0, Upstream rate = 11999 Kbps, Downstream rate = 43225 Kbps

Link Power State: L0
Mode: VDSL2 Annex B
VDSL2 Profile: Profile 17a
TPS-TC: PTM Mode(0x0)
Trellis: U:ON /D:ON
Line Status: No Defect
Training Status: Showtime
Down Up
SNR (dB): 6.9 6.1
Attn(dB): 22.1 0.0
Pwr(dBm): 12.6 7.0
VDSL2 framing
Bearer 0
MSGc: 18 58
B: 51 237
M: 1 1
T: 64 33
R: 12 16
S: 0.0383 0.6297
L: 13376 3227
D: 845 1
I: 64 127
N: 64 254
Counters
Bearer 0
OHF: 28076340 186790
OHFErr: 99 86
RS: 2892472767 512583
RSCorr: 173669247 1238
RSUnCorr: 4616 0

Bearer 0
HEC: 1032 0
OCD: 37 0
LCD: 37 0
Total Cells: 1444066954 0
Data Cells: 5740135 0
Drop Cells: 0
Bit Errors: 0 0

ES: 27 90
SES: 0 0
UAS: 24 24
AS: 69050

Bearer 0
INP: 3.00 0.00
INPRein: 0.00 0.00
delay: 8 0
PER: 2.45 10.43
OR: 78.07 49.08
AgR: 43302.84 12047.83

Bitswap: 33243/33243 12011/12011


My BT profile according to the BT Wholesale speed test is 41.66Mbps, Plusnet have got me set at 42Mb for some reason. When doing speed tests I'm seeing between 39Mbps and 40.5Mbps down, and pretty much bang on 10Mbps up.

Thanks guys.

Edited by deleted (Wed 25-Jun-14 18:03:33)

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