VDSL Performance & Tuning

Forums › New Zealand Broadband › VDSL Performance & Tuning

1 | ... | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | ... | 285

1598 posts

Uber Geek
+1 received by user: 252

Trusted

#862594 20-Jul-2013 14:28

jaxta67: Hi there, I'm just wondering if there is any specific reason you have 5ms latency. I'm located less than 50m from the cabinet and my latency is 26ms. Thanks

You'll still be on a DLM profile which has higher interleaving delays - if your line is good enough you'll eventually be put onto DLM-1 which has a 1ms latency.

jaxta67

26 posts

Geek

#862612 20-Jul-2013 15:11

I was informed today that I am on dlm 2, but my latency is still 26ms to most local servers. Others are higher. Please help?

sidefx

3775 posts

Uber Geek
+1 received by user: 1295

Trusted

#862622 20-Jul-2013 15:27

Help with what? That sounds about right for dlm2 (I wasn't far off that when on dlm2) What does a tracert to say geekzone.co.nz or trademe.co.nz look like?

"I was born not knowing and have had only a little time to change that here and there." | Octopus Energy | Sharesies
- Richard Feynman

SamF

1598 posts

Uber Geek
+1 received by user: 252

Trusted

#862626 20-Jul-2013 15:32

What is your ping time to ns1.snap.net.nz?

Also, are you testing via wireless or wired?

cruxis

512 posts

Ultimate Geek
+1 received by user: 346

#862651 20-Jul-2013 16:41

VDSL has been setup today, but seems slow for being within 50m of the cabinet. Was told it will goto max speed after a 48 hours is that correct ? Just dont reset the router, My line Single Jackpoint with Snap Naked VDSL, with the old adsl splitter still left in.

So do I leave as is and the profile will change automatically sometime?

jaxta67

26 posts

Geek

#862654 20-Jul-2013 16:46

@SamF:
I use a wired connection always (personally I don't trust wireless) and also I done several ping test to the address you gave and it shows and average of 21ms.

Quic Broadband

Move to New Zealand's best fibre broadband service (affiliate link). Free setup code: R587125ERQ6VE. Note that to use Quic Broadband you must be comfortable with configuring your own router.

SamF

1598 posts

Uber Geek
+1 received by user: 252

Trusted

#862660 20-Jul-2013 17:01

@jaxta: Ok, 21ms is bang on. On my line with DLM-1 I get a 5ms ping, and DLM-2 has an 8ms delay (per direction), so 5+8+8 = 21.

jaxta67

26 posts

Geek

#862661 20-Jul-2013 17:03

@sidefx:
Hi there, here are the tracert for those websites. Thanks

Tracert Geekzone

Tracert Trademe:

jaxta67

26 posts

Geek

#862663 20-Jul-2013 17:07

SamF: @jaxta: Ok, 21ms is bang on. On my line with DLM-1 I get a 5ms ping, and DLM-2 has an 8ms delay (per direction), so 5+8+8 = 21.

Hi, could you please elaborate a bit more on this. Also, I'm a bit confused now; previously with my adsl2 connection my average latency was about 10ms, which is huge jumped I'm really confused why?

hio77

'That VDSL Cat'
13036 posts

Uber Geek
+1 received by user: 3896

ID Verified

Trusted

Lizard Networks

Subscriber

#862665 20-Jul-2013 17:12

SamF: @jaxta: Ok, 21ms is bang on. On my line with DLM-1 I get a 5ms ping, and DLM-2 has an 8ms delay (per direction), so 5+8+8 = 21.

would actually be 5+7+7 since DLM-1 is actually 1ms each way not zero.. but still, your talking 2ms..

21ms sounds about right

for reference, on a 8ms profile, i get 18ms locally..

@cruxis, looks like your on DLM-1 there already, that line looks pretty good for 17a too.. whats the connection uptime there? (hard to make assumptions on your line if thats been taken a few seconds after syncing and error rates arent settled..

your SNR is a little higher than normal, and thus your speeds are a little lower, but that all should settle out.. your spectrum is looking pretty good..

#include <std_disclaimer>

Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.

hio77

'That VDSL Cat'
13036 posts

Uber Geek
+1 received by user: 3896

ID Verified

Trusted

Lizard Networks

Subscriber

#862666 20-Jul-2013 17:15

jaxta67:
SamF: @jaxta: Ok, 21ms is bang on. On my line with DLM-1 I get a 5ms ping, and DLM-2 has an 8ms delay (per direction), so 5+8+8 = 21.

Hi, could you please elaborate a bit more on this. Also, I'm a bit confused now; previously with my adsl2 connection my average latency was about 10ms, which is huge jumped I'm really confused why?

you were on a different latency profile on adsl, on vdsl you cant physically control this (in terms of getting your interlevings profile changes to lower pings..) this is all controlled by DLM profiles.

let your line get down to DLM-1, hopefully your error rates are fine to stick, and you will be in the about 5ms range..

#include <std_disclaimer>

Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.

New World

Shop on-line at New World now for your groceries (affiliate link).

SamF

1598 posts

Uber Geek
+1 received by user: 252

Trusted

#862672 20-Jul-2013 17:36

jaxta67:
SamF: @jaxta: Ok, 21ms is bang on. On my line with DLM-1 I get a 5ms ping, and DLM-2 has an 8ms delay (per direction), so 5+8+8 = 21.

Hi, could you please elaborate a bit more on this. Also, I'm a bit confused now; previously with my adsl2 connection my average latency was about 10ms, which is huge jumped I'm really confused why?

Ok, with my DLM-1 line (1ms interleaving) I'm getting a ping time of 5ms to snap's DNS server. With the DLM-2 profile you are currently on you have an added 7ms of latency (thanks Hio for pointing my error out!) between you and the cabinet. This latency affects both upstream and downstream traffic. Therefore you can expect 5ms +7ms +7ms = 19ms to the snap DNS server, which is about what you're getting.

jaxta67

26 posts

Geek

#862679 20-Jul-2013 18:04

@SamF, @Hio77
Thanks for the information about latency. I still don't quite understand this though only because my adsl2 had a difference of around 13ms as appose to my current vdsl2 connection. I might have to look further into this but thanks for the information you were able to provide.

SamF

1598 posts

Uber Geek
+1 received by user: 252

Trusted

#862686 20-Jul-2013 18:26

jaxta67: @SamF, @Hio77
Thanks for the information about latency. I still don't quite understand this though only because my adsl2 had a difference of around 13ms as appose to my current vdsl2 connection. I might have to look further into this but thanks for the information you were able to provide.

VDSL is different to ADSL because you have DLM profiles which will change your interleaving level (and therefor latency). You are currently on DLM-2 which has an overall latency of 16ms, if your line is good enough you will be put onto DLM-1 which has an overall latency of 2ms.

jaxta67

26 posts

Geek

#862688 20-Jul-2013 18:40

@SamF:
Thanks for that. I really hope I do get to DLM-1.

EDIT:On to another case with my line (which is a bit annoying) was the encounter I had with the telecom representative today. My line attenuation which started on vdsl2 at 4 then 5 and now its 7.5 is really starting to bug me. I don't know why it is on the rise. The rep. from telecom told me I might well have a cable that is 500+m even if im located a mere 50m from the cabinet. I hope it doesn't increase much more.

1 | ... | 121 | 122 | 123 | 124 | 125 | 126 | 127 | 128 | 129 | 130 | 131 | ... | 285