Low throughput but high connect rate

Forums › Spark New Zealand (including Skinny and BigPipe) › Low throughput but high connect rate - Telecom Xtra

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220 posts

Master Geek

#804922 24-Apr-2013 14:11

Talkiet:
Foiler: [snip]
The dns I did consciously set to the older ones 202.27.158.40 202.27.156.72 to avoid the dns cache farm.
[snip]

If you were assigned something like 122.56.237.1 and 210.55.111.1 by the network, then your actions will have degraded your DNS performance a little bit.

Note to other customers, if you weren't allocated these DNS servers by the network, don't try and use them, you won't be able to see them.

Cheers - N

The Domain Controller is DNS for all network clients, and the Active Directory forward lookup zone properties are like this .. can you please clarify what improvement would be by using the assigned servers which are as you have shown ..

Talkiet

4793 posts

Uber Geek

Trusted

#804943 24-Apr-2013 14:24

Foiler:
Talkiet:
Foiler: [snip]
The dns I did consciously set to the older ones 202.27.158.40 202.27.156.72 to avoid the dns cache farm.
[snip]

If you were assigned something like 122.56.237.1 and 210.55.111.1 by the network, then your actions will have degraded your DNS performance a little bit.

Note to other customers, if you weren't allocated these DNS servers by the network, don't try and use them, you won't be able to see them.

Cheers - N

The Domain Controller is DNS for all network clients, and the Active Directory forward lookup zone properties are like this .. can you please clarify what improvement would be by using the assigned servers which are as you have shown ..

They're newer, they're geographically distributed which will only really help if you're out of Auckland and they are physically located with relatively direct links to both sides of our core network.

Basically though, you should just accept the line that the DNS servers assigned to you by your ISP are the most appropriate ones.

There's every chance that you specifically won't see an improvement using the assigned DNS servers over the ones you have configured right now - but that doesn't change the fact the the assigned ones are better and more appropriate.

Cheers - N

Please note all comments are from my own brain and don't necessarily represent the position or opinions of my employer, previous employers, colleagues, friends or pets.

plambrechtsen

1948 posts

Uber Geek
Inactive user

#805111 24-Apr-2013 19:53

Plus it sounds like your internal wiring isn't that good.

If you message me your broadband phone number I will run a line test and see if that is the problem.

Foiler

220 posts

Master Geek

#805132 24-Apr-2013 20:42

plambrechtsen: Plus it sounds like your internal wiring isn't that good.

If you message me your broadband phone number I will run a line test and see if that is the problem.

I think we might be getting off the topic a bit, but I am interested ..

On what basis are you concerned about the internal wiring? And what helpful information would an SLT provide?

Foiler

220 posts

Master Geek

#810356 2-May-2013 17:26

The DSLAM port was changed by Chorus on morning 24th April - throughput immediately improved and the noise margin changed from 15.15dB to 12.0dB.

On the evening of the 24th April we got a Worm alert error from the Mako router .. "WORM DETECTED ON YOUR NETWORK - INTERNET ACCESS DENIED FOR INFECTED COMPUTER". It turned out to be the Domain Controller, which is the DNS server. NOD32 scan didn't pick anything up, and what a strange co-incidence that this happened on the same day as the internet throughput getting fixed.

Anyone have any ideas on this?

Incidentally, the internet access to that "affected machine" was not denied at all, at least not 30 minutes later when I remoted into it.

dan

1134 posts

Uber Geek

Lifetime subscriber

#810375 2-May-2013 18:05

have you ruled the mako out? ie replaced it with a standard one to confirm you still have the same issue

re your worm message, did you check the usage logs for it and see what it was doing / if it actually did something bad?

Foiler

220 posts

Master Geek

#810402 2-May-2013 18:59

We don't have a throughput issue any longer since the DSLAM port was changed. So I don't think changing the router now will prove anything. Original problem is solved thank you.

The router log said that there were 1000 new connections from the specified MAC address within a 10 minute time frame - should have mentioned that. I was unable to see any further detail than that - just the one log entry.

I have asked Gen-i Secureme help desk for more details, but that may take some time .. still haven't had any response from them on other questions I put to them on 15 April.

Perhaps someone can suggest how to get details of the 1000 connections that the Mako detected?

Sharesies

Trade NZ and US shares and funds with Sharesies (affiliate link).

locutus

6 posts

Wannabe Geek

#817931 15-May-2013 10:28

Hi Foiler,

You can check your PC Usage reports on the SecureME Management platform to determine what happened to trigger the worm alert.

Often the worm alerts are related to busy servers and can be adjusted to suit the environment (you can do this from Configure > Internet > Alerts).

The worm detection works by analysing NEW connections in a ten minute timeframe, and sometimes will generate false positives for busy machines.

Thanks
Chris

--
I work for Mako.

Foiler

220 posts

Master Geek

#820688 16-May-2013 16:53

dan: have you ruled the mako out? ie replaced it with a standard one to confirm you still have the same issue

Dan you are the man. We thought that the DSLAM port had fixed the problem, but the throughput issue had returned. Still intermittent - most speed tests (both speedtest.net and speedtest.telecom.co.nz) showing 10M+ down, and around 0.5 up, sort of ok. But when you look at streaming content the data flow is bursty, and only really in the 0-2Mbps range, even with a laptop only plugged into the Mako. Customer complaining about websites not displaying, and IMAP email slow/failing.

With a D-Link 502T today .. 14Mbps steady throughput.

The interesting thing about this fault is also the Noise Margin, which I thought was meant to be 12.0 for Xtra connections. After the DSLAM port change a few weeks ago it did show at this figure. But before that, and now, it is quite different.

Here is a history of the Noise Margin ..

15.50
15.15
12.00 ... 24.4.13 - After port change
10.85 - yesterday
10.90
15.10 ... this morning after a PPP reset (plus I think Chorus or Xtra? did a port reset yesterday afternoon)
15.10
15 ... D-Link 502T
15.00 ... Mako
15.00 ... Mako

Here is a full set of stats from the Mako this morning:

ADSL Status
----------------------------------
ADSL Line Connected
Line Rates:   Receive 17363 kbps    Transmit 879 kbps
ADSL Modulation: ADSL2+ (ADSL2+)
ATM Virtual Channel IDs: no connections open
Physical Layer Stats:      Receive                   Transmit
 Noise Margin       17.0 dB/ NA: 0           15.30 dB/ NA: 0
 Attenuation        9.5 dB          1.5 dB
 Power        12.3 dB
Driver version - 1.75 (1.75:E.25.41.65   A)
INP: 0.00 up, 2.05 down
Remote Device: BRCM
  ATURANSIRev: 5632
  ATURANSISTD: 0
  ATUCANSIRev: 62113
  ATUCANSIId: BRCM
  ATUCANSISTD: 0


And for the D-Link 502T:

ItemDownstreamUpstreamUnitSNR Margin1515dBLine Attenuation53dBData Rate17239923kbps
Seems like just replacing the router is going to make the customer happy.

So the question is .. does the noise margin "issue" need fixing? How?

dan

1134 posts

Uber Geek

Lifetime subscriber

#820692 16-May-2013 17:07

Is your mako the old brick or the new 6500 series one?

its funny i had a bunch of the old model self destruct in a short amount of time - few weeks, was kinda unusual,

are u sure the mako isnt playing up / overheating / rebooting or anything? maybe its DSL card is flakey, maybe it has other issues

did the problem start exactly when you changed from Vodafone to Xtra?

OmniouS

423 posts

Ultimate Geek

Trusted

Lifetime subscriber

#820698 16-May-2013 17:24

I'm curious as to what the forward lookup zone is in the attached picture? Usually, the external DNS servers are added to the forwarders tab in the server DNS properties

Foiler:
Talkiet:
Foiler: [snip]
The dns I did consciously set to the older ones 202.27.158.40 202.27.156.72 to avoid the dns cache farm.
[snip]

If you were assigned something like 122.56.237.1 and 210.55.111.1 by the network, then your actions will have degraded your DNS performance a little bit.

Note to other customers, if you weren't allocated these DNS servers by the network, don't try and use them, you won't be able to see them.

Cheers - N

The Domain Controller is DNS for all network clients, and the Active Directory forward lookup zone properties are like this .. can you please clarify what improvement would be by using the assigned servers which are as you have shown ..

Foiler

220 posts

Master Geek

#820716 16-May-2013 18:23

The Name Servers tab don't you mean? That is where they are in this case ..

Foiler

220 posts

Master Geek

#820863 16-May-2013 23:08

Is your mako the old brick or the new 6500 series one?

its funny i had a bunch of the old model self destruct in a short amount of time - few weeks, was kinda unusual,

are u sure the mako isnt playing up / overheating / rebooting or anything? maybe its DSL card is flakey, maybe it has other issues

did the problem start exactly when you changed from Vodafone to Xtra?

Not sure which model - it was new from Secureme just 2 months ago - which is why I didn't take a closer look at it earlier on.

Can't be sure exactly when the problem started, but it was around about the time of the ISP CHANGE.

There is no rebooting going on, in fact no adsl resyncing either.

locutus

6 posts

Wannabe Geek

#821015 17-May-2013 10:37

Hi Folier,

SNR Noise will change. It's a reading of the amount of signal the device is receiving from the exchange. It's not fixed.

http://www.dslreports.com/faq/16220

Can you contact the Mako Support Team on +64 9 448 1340 and we'll arrange a replacement to be sent to you to determine if that is the cause.

Thanks,
Chris

--
Mako Networks.

Foiler

220 posts

Master Geek

#821032 17-May-2013 11:04

Hi Folier,

SNR Noise will change. It's a reading of the amount of signal the device is receiving from the exchange. It's not fixed.

http://www.dslreports.com/faq/16220

Can you contact the Mako Support Team on +64 9 448 1340 and we'll arrange a replacement to be sent to you to determine if that is the cause.

Thanks,
Chris

--
Mako Networks.

Thanks for the offer Chris .. but the Mako router is part a Secureme service so presumablty we must go through the gen-i channel? I have emailed the gen-i helpdesk so we should have some action in no time? ;)

How would you reconcile your link and noise comments with this contribution ..
http://www.geekzone.co.nz/forums.asp?forumid=49&topicid=100263&page_no=1#606554

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