Print

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

[dpd]

hi and thanks in advance for any help anyone may be able to offer me. i am trying to find out if interleaving is active on my line. i happen to think that it is as i have been comparing my stats to others on this forum and my brothers connection who lives nextdoor to me ( i know its very close ).

im currently with fast.co.uk and have no issue with the broadband speed and the guys in support are always really helpful and speedy in there responses. i have put in a request with support to have interleaving turned off and they said that it will be complete today. the reason i want it off is that i play online games very often and last few months i have noticed that on certain games i suffer with latency issues.

im using a netgear dg834gt and im connected via an ethernet cable. my brothers connection when pinging bbc.co.uk is around 10-20ms (interleaving off) but when i ping i get the following result:


Pinging bbc.co.uk [212.58.254.252] with 32 bytes of data:
Reply from 212.58.254.252: bytes=32 time=37ms TTL=246
Reply from 212.58.254.252: bytes=32 time=40ms TTL=246
Reply from 212.58.254.252: bytes=32 time=37ms TTL=246
Reply from 212.58.254.252: bytes=32 time=131ms TTL=246

Ping statistics for 212.58.254.252:
    Packets: Sent = 4, Received = 4, Lost = 0 (0% loss),
Approximate round trip times in milli-seconds:
    Minimum = 37ms, Maximum = 131ms, Average = 61ms

i am told that times in this region show that interleaving is probably turned on but how do i check for sure one way or another? hopefully i will see a reduction in these times when it goes through today sometime but again it would be nice to check for sure. i have tried to do the process which is mentioned on these forums where i debug and then type telnet 192.168.0.1 but at this stage it fails and says it is not a valid command.

im no expert so apologies if i have not given enough information on my connection.

[roseway]

Hi and welcome.

I think that telnet is the only way to get the information with the official Netgear firmware. If you get the response that 'telnet' is not a valid command, then I presume that it's not installed on your system. I presume you're using Windows, in which case I don't know what to do, but I imagine that telnet must be an optional component which can be installed.

If you do manage to get telnet working, then the command which you need to use is the one for a Broadcom chipset:

# adslctl info --stats

Which produces a stream of information with the interleaving status shown near the top.

[dpd]

hi and thanks for your help. i have enabled telnet via the contol panel>programs and features option. i did what you said and i got a screen full of info which means nothing to me  can you please tell me where i should be looking. thankyou

[dpd]

ah i see it. it says that the channel is FAST so i presume this is FASTPATH.

the trouble i have though is my connection to gaming servers is pretty bad. i mean i got a download speed of 6-7mb and a upload of around 350-400kb and i thought my ping of around 40ms was fine for online games. but my connection to the gaming servers is always average at best resulting in latency in my play. very frustrating as it used to be great. around december time my problems started and it continues now. i changed my isp to fast.co.uk hoping that this was the problem but no it obviously isnt.

can anyone please offer me any help or advice. i would really appreciate it as im so frustrated by this problem. i have setup dmz and linked it to my xbox360 but still i get a poor connection. like i said earlier my brother lives nextdoor and gets pings to bbc.co.uk around 10-20ms. mine is at least double that. i dont think its an exchange issue as my brother is on it aswell but then again i know not much about it....

[roseway]

Yes, FAST is the same as FASTPATH, so that's not the cause of your latency problem. Any server between you and the site you're connecting to can add to the latency, so it could be your ISP or a site which they work through. You might get some useful information from a traceroute, so I suggest that you open a command line window and type

tracert bbc.co.uk

and copy the result here.

[dpd]

this is what i get....

Tracing route to bbc.co.uk [212.58.254.252]
over a maximum of 30 hops:

  1     1 ms    <1 ms    <1 ms  192.168.0.1
  2    40 ms    40 ms    39 ms  213.130.147.57
  3   164 ms   223 ms   214 ms  bdr1.lon-th1.as8401.net [195.82.97.228]
  4    42 ms   235 ms    60 ms  212.58.239.125
  5    37 ms    40 ms    38 ms  212.58.238.133
  6    56 ms    50 ms    48 ms  rdirslb0.thdo.bbc.co.uk [212.58.224.136]
  7    48 ms    50 ms    52 ms  virtual3.rbsov.bbc.co.uk [212.58.254.252]

couple of higher ping times in the middle. dont know if they should be there or not. thanks again by the way.

[roseway]

I'm no expert on these things, but it rather looks to me as though your ISP (hop 2) is the problem.

[dpd]

sorry to sound dumb but could you please explain. also how i would confirm this and rectify the problem.

[roseway]

I'm not sure that I have a full enough understanding to explain it, but I'll try.

The first thing is that you can ignore high intermediate values if subsequent values are lower. So your hops 3 and 4 have high values, but there are much lower values after them. All this means is that those servers prioritise actual through traffic and give low priority to ICMP (ping) responses. All that matters is how fast the data passes through them.

But hop 2 is just about the lowest value of the lot, and it's still rather on the high side. To give you a comparison, when I run a traceroute the second hop (my ISP) consistently shows values around 20 ms, and a ping to bbc.co.uk is generally less that 25 ms (and my connection is interleaved). So although I can't be certain, I suspect that your ISP is causing a bit of extra latency.

[jeffbb]

Hi


this is my result  with interleave depth of 32 downstream and 4 upstream

Tracing route to bbc.co.uk [212.58.254.252]
over a maximum of 30 hops:

  1     1 ms     1 ms     1 ms  192.168.0.1
  2    39 ms    38 ms    39 ms  gandhi-dsl1.wh.zen.net.uk [62.3.83.5]
  3    39 ms    39 ms    39 ms  erazmus-ge-0-0-1-3.wh.zen.net.uk [62.3.80.197]
  4    45 ms    45 ms    46 ms  leibniz-ge-3-0-0-0.te.zen.net.uk [62.3.80.45]
  5    45 ms    47 ms    55 ms  lorenz-ge-2-0-0-0.te.zen.net.uk [62.3.80.41]
  6    47 ms    46 ms    47 ms  82.71.254.134
  7    57 ms    44 ms    46 ms  212.58.238.129
  8    45 ms    46 ms    46 ms  rdirslb0.thdo.bbc.co.uk [212.58.224.136]
  9    45 ms    45 ms    46 ms  virtual3.rbsov.bbc.co.uk [212.58.254.252]

Trace complete.
 edit basically interleave will add about 20 ms to the time
 regards Jeff

[dpd]

my router confirms that i am on FASTPATH so am i right in saying that my ping time is twice that of what it should be? using other peoples stats as a guide then mine is way too high and i only live about 100yards from my exchange.


***fast.co.uk customer support have also said that it looks odd and are gonna do some tests via remote access tommorrow and see whats happening so i will let you know how it goes****

thanks again for your time roseway and jeff.

[jeffbb]

Hi

The ping times have very little to do with the distance to your exchange when you consider the many miles of line to the various locations.
Regards jeff

[kitz]

>> ping times have very little to do with the distance to your exchange

Indeed, distance to the exchange doesn make much difference. 
However location in the UK can do..  for example someone up in Scotland or in Ireland, would expect to get higher latency to the BBC, than someone in London.

Times still seem a bit high though, so hopefully your ISP are able to spot something.

[jeffbb]

Hi

A little bit of info on latency

The distance the data is traveling. Data travels at (very roughly) 120,000 miles (or 192,000 kilometers) per second, or 120 miles (192 km) per ms (millisecond) over a network connection. With traceroute, we have to send the data there and back again, so the latency will raise roughly 1ms for every 60 miles (96km, although with the level of accuracy we're using here, we should say "100km") of distance between you and the target.

more info there 
http://www.nessoft.com/kb/42
Regards Jeff

[dpd]

thanks for all the info guys. i have been in touch with the support guys from fast.co.uk numerous times. my problem isnt yet sorted but they seem to be trying to help me so thats a start i suppose.

anyway when he did some testing via remote access to my router he found that he was getting ping times around 50-70ms to bbc.co.uk which is worse than i was getting yesterday. so after that asked me to monitor the line and see if theres any changes during the course of the day. (which i knew there wouldnt be as its been like this a while now) i reported back and he now thinks it might be an issue with a line card (whatever that is) he confirmed that i should be getting ping times around 20ms and possibly better and that i definatley was on FASTPATH. he is going to log a fault with BT so will see what happens and report back to let you know what comes of it.

by the way does anyone know what a line card is and what it does and also in what way does it effect on my connection? again thanks for any advice.