How to get Ping lower?

Hi,

I recently got Fibre last week but my pings to bbc.co.uk is about 32ms, was 42-45ms on ADSL2+.

I think I am on Fast Path/Speed profile

Here is my stats

# xdslcmd info --show
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 40462 Kbps, Downstream rate = 120784 Kbps
Bearer: 0, Upstream rate = 19999 Kbps, Downstream rate = 79987 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): 18.8 23.3
Attn(dB): 13.9 0.0
Pwr(dBm): 13.3 4.6
VDSL2 framing
Bearer 0
MSGc: 18 26
B: 239 237
M: 1 1
T: 23 42
R: 0 16
S: 0.0955 0.3781
L: 20104 5374
D: 1 1
I: 240 127
N: 240 254
Counters
Bearer 0
OHF: 335787249 430594
OHFErr: 3246 79
RS: 0 3346581
RSCorr: 0 135
RSUnCorr: 0 0

Bearer 0
HEC: 11810 0
OCD: 342 0
LCD: 342 0
Total Cells: 3781361836 0
Data Cells: 584173874 0
Drop Cells: 0
Bit Errors: 0 0

ES: 1655 73
SES: 1 0
UAS: 23 23
AS: 555357

Bearer 0
INP: 0.00 0.00
INPRein: 0.00 0.00
delay: 0 0
PER: 1.65 3.98
OR: 116.09 64.22
AgR: 80103.09 20063.54

Bitswap: 387914/387914 5002/5002

In the Subject you ask how to get the ping lower, and in the post you tell us it is 10-13ms lower than it was on ADSL2+.

???

I think the OP means "even lower".

I get a ping of 9ms on FTTC to the BBC normally, but with "interleaving high" enabled (due to a fault on the line), that shot up to between 35-45ms.
As soon as interleaving was removed, straight back down to 9ms.

I'd investigate why interleaving is enabled and if that can be sorted... not much else one can do elsewise.

From those stats i would say that the OP isn't currently interleaved, I agree that 32ms on fast path to the BBC is a little on the high side,Who is the ISP? as it could have something to do with them

Edited by tommy45 (Tue 20-May-14 00:58:51)

And where they are in the UK

In reply to a post by MrSaffron:

And where they are in the UK

Spot on Mr Saffron. Where i live in the Scottish Highlands it's pretty much impossible to get pings <30ms even on fastpath on ADSL2+. This has improved on fibre as i'm getting ~20ms but i know to get significantly lower ping times i'd have to live closer to London. I've come across someone with ping times of 4ms on fibre...I suspect they live next to Telehouse in Central London LOL

Edited by deleted (Tue 20-May-14 08:11:23)

And a tracert in case there is some odd routing going on taking packets around the houses.

I'm North East of Scotland and on BT Infinity 2.

And that, And BT's somewhat questionable routing, So East scotland >>>> to BT's london data centre, then peered into BBC , would be the most direct way, I wonder if this isn't the case, It would explain why the latency is so high

It's in part the distance and network topology between end users and ISP's data centre, and POP's ect, Whilst the majority of the biggest ISP's all favour london, there are one of 2 that have data centres in other parts of the country as well,

In reply to a post by baby_frogmella:

In reply to a post by MrSaffron:

And where they are in the UK

Spot on Mr Saffron. Where i live in the Scottish Highlands it's pretty much impossible to get pings <30ms even on fastpath on ADSL2+. This has improved on fibre as i'm getting ~20ms but i know to get significantly lower ping times i'd have to live closer to London. I've come across someone with ping times of 4ms on fibre...I suspect they live next to Telehouse in Central London LOL

I think someone on sky Llu in the Inverness / Forres area was getting lower pings. Those ISPs that use bt wholesale are generally 20cn still and pings are 50ms or higher. You can ping New York in 55ms on a good line, so it's not a good advert for bt wholesale in Scotland.

In reply to a post by JB68:

I'm North East of Scotland and on BT Infinity 2.

You should have a pretty good connection up there!

BT has Business support offices in Alness - for Business Broadband, including Infinity and also up in Thurso. So, you even speak te same dialect!

ive capped my sync speed with my zyxel modem using this line adsl configure --maxDataRate 09000 700 09700, the line errors are very low now im currently getting 41ms pings to the BBC , im in Chesterfield.

Capped Sync

Hoping it knocks interleaving off a bit.

The only time i got 14ms was when i had it first installed, the line was perfect for 12 days,then it added interleaving, to get 24ms , to say im 1200 metres from the cab and quite a bit of aluminium in there as well.

Since ive been trying the zyxel all in one , its added a lot more interleaving.

Edited by bobbyboyuk (Wed 21-May-14 15:59:57)

My ping to BBC on Infinity 2 is 11ms - Midlands

In reply to a post by bobbyboyuk:

ive capped my sync speed with my zyxel modem using this line adsl configure --maxDataRate 09000 700 09700, the line errors are very low now im currently getting 41ms pings to the BBC , im in Chesterfield.

That appears to be on ADSL2+?

Not something that is supposed to be done on FTTC, and this is an FTTC thread in the Fibre forum .

no, fibre to the cabinet bt, i got 2mb on adsl2

Linky Now say sorry

Edited by bobbyboyuk (Wed 21-May-14 20:15:49)

In reply to a post by wolvesmad:

My ping to BBC on Infinity 2 is 11ms - Midlands

C:\>ping bbc.co.uk

Pinging bbc.co.uk [212.58.246.103] with 32 bytes of data:
Reply from 212.58.246.103: bytes=32 time=20ms TTL=50
Reply from 212.58.246.103: bytes=32 time=20ms TTL=50
Reply from 212.58.246.103: bytes=32 time=20ms TTL=50
Reply from 212.58.246.103: bytes=32 time=20ms TTL=50

North East Hampshire, near Aldershot. So pretty close to London. Infinity 2 - interleaved.

In reply to a post by bobbyboyuk:

Linky Now say sorry

SNR is high, can't you get more speed out of it

In reply to a post by JB68:

In reply to a post by bobbyboyuk:

Linky Now say sorry

SNR is high, can't you get more speed out of it

lol, thats the idea, to get lower speed, and interleaving down. ive lowered it, i can get 16-17 down.

In reply to a post by bobbyboyuk:

no, fibre to the cabinet bt, i got 2mb on adsl2

SIN 498, i.e. the Openreach DLM, may not behave as you expect/hope .

Note : It is the DLM system that sets the line profile, and this should not be interfered with by CPs/users setting rates, SNR margins etc. at the modem.

I actually hope you are lucky and things turn out well, but ....