Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[boost]

Does anyone have a BT Internet product that doesn't doesn't double their latency?

I'm fastpath (d=1) FTTC and when installed, ping was 11/12ms to bbc. The hub has now updated itself (I assume) with the correct credentials (the only change that is evident from install) and first hop ping is now 19ms.

Gateway hopping results in a +/- 3ms first hop. Nowhere near where it should be. Is this a BT Internets thing or coincidence? It's kinda annoying that a technology that can do single digit latency turns into this...?

[kitz]

8ms is typical latency increase if Interleaving has been applied.

>>  I'm fastpath (d=1)
>> The hub has now updated itself

Out of interest are you on a Huawei cab and do you have a HH 5A?

[roseway]

first hop ping is now 19ms

Just to be clear, is this increase reflected in the latency to remote sites, such as the BBC?

[boost]

8ms is typical latency increase if Interleaving has been applied.

>>  I'm fastpath (d=1)
>> The hub has now updated itself

Out of interest are you on a Huawei cab and do you have a HH 5A?

I only glanced at the bandplan but it did look like Huawei. 3970 rings a bell? I will double check later.

I do, yes. Well, it's a business hub 5a. As of yesterday, the HG612 is now mated to the faceplate with the BH5A riding bare back.

[boost]

first hop ping is now 19ms

Just to be clear, is this increase reflected in the latency to remote sites, such as the BBC?

Yes, unfortunately

[kitz]

8ms is typical latency increase if Interleaving has been applied.

>>  I'm fastpath (d=1)
>> The hub has now updated itself

Out of interest are you on a Huawei cab and do you have a HH 5A?

I only glanced at the bandplan but it did look like Huawei. 3970 rings a bell? I will double check later.

I do, yes. Well, it's a business hub 5a. As of yesterday, the HG612 is now mated to the faceplate with the BH5A riding bare back.

There's beginning to emerge a pattern of some users being treated very harshly by the DLM after g.inp has been activated on their dslams.   Previous non interleaved lines have what appears to be interleaving applied in that their latency shoots right up and they may also lose some sync speed.    Tests dont show any proof that the line is actually interleaved other than the increased latency.   

The people affected seem to be those using ECI modems and a couple of days ago I had a nagging doubt about some other routers which may also use the same chipset as the modems such as the HH5A.    Since then cases have just started to appear showing people with a HH5A are also seeing these same problems.   Including last night another new one - Bob Pullen Plusnet rep, who is using a HH5.

[boost]

Interesting!

So this may be an invisible interleaving issue rather than BT rattling my packets around several tunnels? I'll dig out all the stats from the modem later.

I couldn't see anything obviously related to g.inp but then this is a pretty short line with 125Mb~ DS attainable so wasn't sure it would be visible?

It might be coincidence but the BH5a kept failing PPP when I first put the HG in front of it. I added ptm.301 back to the HG and rebooted it and that seemed to do the trick. Could be coincidence? Have I just opened myself up to GUI bork?

[boost]

The broadband username has 'HG31' in the name. I saw a mention elsewhere I might be able to remove the hg31 portion and just use the rest of it for PPP?

Code: [Select]

xdslcmd info --stats
xdslcmd: ADSL driver and PHY status
Status: Showtime
Retrain Reason: 0
Last initialization procedure status: 0
Max: Upstream rate = 36500 Kbps, Downstream rate = 123116 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): 18.3 23.0
Attn(dB): 5.4 0.0
Pwr(dBm): 13.5 -13.4
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: 54740743 1674907
OHFErr: 61 60
RS: 0 4179248
RSCorr: 0 35
RSUnCorr: 0 0

Bearer 0
HEC: 468 0
OCD: 52 0
LCD: 52 0
Total Cells: 1034829085 0
Data Cells: 268622276 0
Drop Cells: 0
Bit Errors: 0 0

ES: 52 54
SES: 0 0
UAS: 22 22
AS: 90534

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: 43590/43590 5874/5874

Also currently uploading to MDWS if anyone wants to take a peek.

However...

Tracing route to bbc.co.uk [212.58.244.20]
over a maximum of 30 hops:

  1     2 ms     2 ms     2 ms  BTHUB5 [10.21.12.254]
  2    18 ms    17 ms    20 ms  host81-148-128-1.in-addr.btopenworld.com [81.148
.128.1]
  3    18 ms    18 ms    18 ms  213.120.182.141
  4    18 ms    18 ms    18 ms  213.120.161.82
  5    18 ms    18 ms    19 ms  31.55.164.187
  6    19 ms    19 ms    19 ms  31.55.164.107
  7    23 ms    23 ms    22 ms  acc1-10GigE-0-5-0-7.bm.21cn-ipp.bt.net [109.159.
248.102]
  8    34 ms    31 ms    31 ms  109.159.252.210
  9    30 ms    31 ms    31 ms  core1-pos9-0.bletchley.ukcore.bt.net [194.72.31.
133]
 10    30 ms    29 ms    28 ms  194.74.65.42
 11     *        *        *     Request timed out.
 12     *        *        *     Request timed out.
 13    25 ms    31 ms    25 ms  ae0.er01.telhc.bbc.co.uk [132.185.254.109]
 14    23 ms    23 ms    24 ms  132.185.255.149
 15    29 ms    29 ms    31 ms  fmt-vip71.telhc.bbc.co.uk [212.58.244.20]

Trace complete.

This is absolute best case, after GW hopping.

Currently using a powerline adapter which adds 2ms, as per first hop.

[boost]

Alrighty then.

Removing the 'HG31' from the username = no PPP.
Putting myself back on the service username = 11ms ping.


 

[NewtronStar]

The people affected seem to be those using ECI modems and a couple of days ago I had a nagging doubt about some other routers which may also use the same chipset as the modems such as the HH5A.    Since then cases have just started to appear showing people with a HH5A are also seeing these same problems.   Including last night another new one - Bob Pullen Plusnet rep, who is using a HH5.

Ok well I am using the HG612 as the modem and using the HH5 type A as a router if this helps 

Code: [Select]

Tracing route to bbc.co.uk [212.58.244.18]
over a maximum of 30 hops:

  1    <1 ms    <1 ms    <1 ms  BThomehub.home [192.168.1.254]
  2    10 ms    10 ms    11 ms  217.32.142.106
  3    11 ms    11 ms    11 ms  217.32.142.174
  4    18 ms    18 ms    17 ms  212.140.206.2
  5    17 ms    17 ms    17 ms  213.120.162.65
  6    18 ms    18 ms    17 ms  31.55.165.107
  7    17 ms    17 ms    17 ms  acc1-10GigE-2-3-0.mr.21cn-ipp.bt.net [109.159.250.94]
  8    29 ms    27 ms    28 ms  core2-te0-5-0-1.ealing.ukcore.bt.net [109.159.250.145]
  9    28 ms    27 ms    27 ms  peer2-xe3-2-1.telehouse.ukcore.bt.net [109.159.254.225]
 10    30 ms    29 ms    30 ms  194.74.65.42
 11     *        *        *     Request timed out.
 12     *        *        *     Request timed out.
 13    27 ms    28 ms    27 ms  ae0.er01.telhc.bbc.co.uk [132.185.254.109]
 14    28 ms    28 ms    28 ms  132.185.255.149
 15    28 ms    27 ms    27 ms  fmt-vip72.telhc.bbc.co.uk [212.58.244.18]

Trace complete.
if i run the same tracert to bbc.co.uk using boost path (212.58.244.20) it shows a difference.

Code: [Select]

Tracing route to fmt-vip71.telhc.bbc.co.uk [212.58.244.20]
over a maximum of 30 hops:

  1     1 ms    <1 ms    <1 ms  BThomehub.home [192.168.1.254]
  2    11 ms    10 ms    10 ms  217.32.142.106
  3    12 ms    11 ms    11 ms  217.32.142.158
  4    17 ms    17 ms    17 ms  213.120.158.226
  5    17 ms    17 ms    17 ms  213.120.162.65
  6    18 ms    17 ms    18 ms  31.55.165.107
  7    17 ms    17 ms    17 ms  acc1-10GigE-1-2-0.mr.21cn-ipp.bt.net [109.159.250.70]
  8    25 ms    23 ms    23 ms  core1-te0-14-0-3.ealing.ukcore.bt.net [109.159.250.5]
  9    73 ms    24 ms    23 ms  peer2-xe3-0-0.telehouse.ukcore.bt.net [109.159.254.223]
 10    27 ms    26 ms    26 ms  194.74.65.42
 11     *        *        *     Request timed out.
 12     *        *        *     Request timed out.
 13    23 ms    25 ms    24 ms  ae0.er01.telhc.bbc.co.uk [132.185.254.109]
 14    25 ms    25 ms    25 ms  132.185.255.149
 15    25 ms    25 ms    25 ms  fmt-vip71.telhc.bbc.co.uk [212.58.244.20]

Trace complete.

[Chrysalis]

the hh5a as a router will have no affect newt, we talking about the modem.

I fear we will see the same issues with eci cab and bcm modem combo.  if yes there will be some VERY unhappy peeps on eci cabs,

[boost]

Newtron, you have a 10ms first hop? What HG are you on and where in the country are you?

This is not a modem issue chaps but a gateway selection one specific to the BT Internetz. If I remove my PPP details and select the install time credentials 'green-light' I get routed to a much more favourable gateway; 18ms first hop~ becomes 11ms.

There is a 2-3ms difference depending on which NS entry is returned for bbc.co.uk but that is not the issue either.

[NewtronStar]

Thanks Boost & Chry

Northern Ireland is my location.

It's one of those things i don't understand ping results, a new PPP connection would only change the ping by 2-3ms it would seem i'm stuck on 2 gateway hops and thats' the Isle of Man and Carlisle it been a long long time since i've seen a london gateway they always gave me a lower ping result (millisecond).

[Chrysalis]

I am guessing newt you abandoned the 8800nl? as before you had a hh3, so I guess you got a hh5 instead?

[NewtronStar]

I am guessing newt you abandoned the 8800nl? as before you had a hh3, so I guess you got a hh5 instead?

A nice fellow Kitizen member pooclah was able to send me the HH5 type A 
But using the HG612 as modem and HH5A as router.