mtu help,weird size

[roberto2212]

1.I set on billion 8800nl MTU 1492
2.I set on my computer MTU 1492
3.I tested my connection on website speedguide.net, tcp/ip analyzer
4.on tcp/ip analyzer showed me MTU = 1460
MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput. If you are using a router, it could be limiting your MTU regardless of Registry settings.
So I ask you why is my mtu 1460 if on router I set 1492 and pc same 1492?
When I play online gaming still I got delay 1 second.I think that is problem with MTU.
Can any one please help me?Thanks
« SpeedGuide.net TCP Analyzer Results »
Tested on: 2016.12.29 05:27
Client OS/browser: Windows 8.1 (Firefox 50.0)

TCP options string: 0204058c0103030801010402
MSS: 1420
MTU: 1460
TCP Window: 66560 (NOT multiple of MSS)
RWIN Scaling: 8 bits (2^8=256)
Unscaled RWIN : 260
Recommended RWINs: 65320, 130640, 261280, 522560, 1045120
BDP limit (200ms): 2662kbps (333KBytes/s)
BDP limit (500ms): 1065kbps (133KBytes/s)
MTU Discovery: ON
TTL: 115
Timestamps: OFF
SACKs: ON
IP ToS: 00000000 (0)

auto mtu is off:
C:\Windows\system32>netsh interface tcp show gl
Querying active state...

TCP Global Parameters
----------------------------------------------
Receive-Side Scaling State          : enabled
Chimney Offload State               : disabled
NetDMA State                        : disabled
Direct Cache Access (DCA)           : disabled
Receive Window Auto-Tuning Level    : disabled
Add-On Congestion Control Provider  : none
ECN Capability                      : disabled
RFC 1323 Timestamps                 : disabled
Initial RTO                         : 2000
Receive Segment Coalescing State    : disabled
Non Sack Rtt Resiliency             : disabled
Max SYN Retransmissions             : 2

I made few test like:
1.set billion 8800nl to bridge mode + pc with pppoe connection mtu 1492..result on SG TCP/IP Analyzer mtu-1460
2.tryed different modem hg612 on bridge connection + pc with pppoe connection mtu 1492..result on SG TCP/IP Analyzer mtu-1460
3.set hg612 in bridge connection + linksys wrt 1900acs router with wan setup on pppoe + mtu 1492...result on SG TCP/IP Analyzer mtu-1460
4.all my network adapters was set mtu 1492
5.what is weird is that if I set on router mtu say 1451,1452,1453,1454 to max. 1460..then I checked on speedguide.net tcp/ip analyzer mtu..showed me correct mtu..mean if router 1452 then on speedguide same 1452
6.but if I set on router 1461 then on speedguide is 1460 max.
7.looks like I cant set up mtu more like 1460
8.propably is my network bad configurate on street cabinet

[Steve]

I'd ring support next week, you seem to have set it up correct at your end.

[roberto2212]

no respond?..I expected this due idnet offer bad support and bad speed.

[Simon]

The office would have been closed over the Christmas and New Year holiday period, but they should be there now.  When did you email?

[roberto2212]

1.this is not true: idnet website

23rd December 2016 to 3rd January 2017

During the period 23rd December - 3rd January we will be available 24hours to assist with diagnosing and reporting technical issues.

Please note: Our wholesaler will be closed for the Christmas period, only opening 9am – 5pm on 28th, 29th and 30th December.

We will do our very best to get updates and progress on any fault cases raised to the wholesaler during this period but please understand they will be in much higher demand and such cases may not have updates until 3rd January when they are 'Business As Usual'.

Ethernet Services will receive full support as usual.

Sales and Provisions queries will be responded to upon our return to business 3rd January.

We would like to take this opportunity to sincerely thank you for your valued custom and wish you all a very Happy Christmas and New Year.

2.Posted by: Steve
I'd ring support next week, you seem to have set it up correct at your end.

3.unfortunatelly Steve I guess not ringed, because no responded
4.question is why it is this forum if any one dont help me
5.and people from kitz forum help me straight to way (I posted on kitz same topic)

[Lance]

This is only an unofficial customer forum. Whilst IDNet support do occasionally drop by and pick up issues, if you want a guaranteed response you will need to phone or email them directly.

I'd imagine the lack of responses to your questions is because, as Steve, said, it appears to be set up correctly so it is one that Support will need to deal with.

[roberto2212]

ok I sended email and contact form by 3.1.17, but unfortunatelly 7 days gone and still not reply from idnet.my speed is bad and mtu not fixed.

[Glenn]

Call them on 0800 331 7000

[roberto2212]

Unfortunately no one pick up phone, it is very frustrating.I didnt know that idnet offer bad support

[Simon]

I have spoken to Nick at IDNet, and they have been in touch with this customer today.

[roberto2212]

they finally contacted me but not fixed this issue.Online gaming laging,streaming freezing,iptv not possible watching.

[nowster]

What class of service are you on? ADSL, ADSL2, VDSL? You don't mention link speeds or signal to noise ratios.

Could your problem be something other than MTU?

[roberto2212]

connection is vdsl2 and speed is 60/17 ping 13 ms.Unfortunately idnet dont know how to fix mtu issue.So I must cancel broadband and switch to another internet provider.You can check noise ratio (see pics)

[nowster]

connection is vdsl2 and speed is 60/17 ping 13 ms.Unfortunately idnet dont know how to fix mtu issue.So I must cancel broadband and switch to another internet provider.You can check noise ratio (see pics)

Good luck in finding an ISP more clued up than iDNet.

[Steve]

Just wondering whether the BT test account is still available and whether it works with FTTC, if it does it would rule in or rule out IDNet as the cause.

[Tacitus]

Just wondering whether the BT test account is still available and whether it works with FTTC, if it does it would rule in or rule out IDNet as the cause.

He's cancelled iDNet and gone over to Sky.  See this thread on Kitz - it's on page 7.

http://forum.kitz.co.uk/index.php/topic,19140.0.html

Could be wrong but don't Sky insist you use their router?

[Simon]

Frying pans and fires spring to mind...   

[roberto2212]

Good luck in finding an ISP more clued up than iDNet.

Thanks.

[roberto2212]

Could be wrong but don't Sky insist you use their router?

Yes you can use sky hub or billion 8800nl with DCHP option 61 or dd-wrt router....https://charleswilkinson.co.uk/2014/10/27/sky-fibre-broadband-with-dd-wrt/

[zappaDPJ]

Reading through this thread has piqued my curiosity a little. There was a time when low latency was rather important to me and I recall trying different MTU settings in an effort to keep it down. From what I remember doing so made a very negligible difference to either my latency or my throughput. One thing I do recall is reading that in theory raising your MTU value should increase throughput but also increase latency. That seems at odds with what's being said here?

[roberto2212]

Well, I tryed help Idnet with this issue.I changed modem(hg612,billion 8800nl), tryed with different router (asus,tp-link,linksys), tryed different firmware or 3rd part like asus-merlin,ddwrt,tomato.Tryed opening ports,dmz,upnp.Tested in different time,days.Tryed reinstall windows, initialize ps4 with new firmware.Replaced new cable rj11,rj45 (cat5,5e,6).But still is problem with online gaming.Tested same game or streaming same video on sky with my friend and no issue.So I really dont understanding where could be problem.Only one problem is that on speedguide showed me mtu 1460 and is limited to this size.So I asked idnet if they can change my mtu to correct value mtu 1492 and then I can test online gaming and streaming again, so I eliminated the problem.Unfortunatelly idnet not fixed this mtu.Propably they dont know how to fix or they dont wanna help me.They said, that I can cancel contract.Well, I tryed resolve issue but if idnet ignore then what I can do more?

[roberto2212]

One thing I do recall is reading that in theory raising your MTU value should increase throughput but also increase latency

I understand that for online gaming is important latency,jitter. But I dont think so, that if my speed is 60/18 with ping 13 will incease latency to say 25-30 with mtu 1492.And anyway ping 20-30 will still adequate for online gaming.

[nowster]

MTU is probably irrelevant. It's the maximum packet size that can be sent without fragmentation.

Any game that assumed you could get the full 1500 bytes of an Ethernet packet out through a DSL connection would be very badly programmed.

[roberto2212]

Im didnt said that i wanna 1500.I said that I want fix my mtu to correct size 1492 for dsl.I tested again with modem on bridge mode plus ps4 with pppoe setup and mtu 1460.Got nat 1 what is mean all ports opened.Started game and same issue again.So I checked if no corrupted files in game with offline mode.But in offline mode game is brilliant.Again started online and I got delay 1 second.And my opponents is faster twice.Looks like i cant sync with server or opponents on every game.And my opponents see early what I will do.So is still faster.( played fifa 17 and nhl 17).So I really dont understanding where is problem if mtu is irrelevant.Like I said, tested my ps4 again on sky with my friend (just I set up static ip on ps4 and I put ps4 ip to dmz on skyhub, on ps4 set up mtu 1500 and game worked brilliant.No delay or lag just perfect.So where is then problem????In my socket or internal (external) wiring or street cabinet?And also I have activated extra triffic priority for 12£ and I still got delay or lag.

[roberto2212]

And also some opponents sended me email on ps4 when I play online that is something wrong with my ps4 because they see that I m very slowly,players not responded,AI looks like chicken on ice.

[nowster]

Have you considered lowering the MTU on your PC to 1400? This is counter-intuitive.

The default on Ethernet (which is what connects your PC to the router) is 1500.

Why 1492? Why not set your MTU to 1500? On PPPoA you have to get something that's near to a multiple of an ATM frame, but for PPPoE you're probably don't.

[roberto2212]

1.tryed all combination 1400,1452,1460,1473,1492,1500..same problem.
2.idnet use pppoe, means that router allow me put max. size 1492, cant setup 1500(only pppoa or dhcp)
3.also tryed put manually on ps4 mtu 1500 and on pc same 1500..still same problem
4.on speedguide.net still is 1460 mtu.This mtu is changed only if I put lower mtu size 1460>

[stevenrw]

Have you tried the router tech support?

[roberto2212]

for what?i owning asus,linksys,tp-link,billion all routers is 5 month old.I dont think so that is router fault or modem.

[stevenrw]

Sometimes, you just get lucky and speak to somebody who actually knows what your issue is. I've had Billion routers for many years and I've found their tech support to be pretty knowledgable.
Of course there is no guarantee.
You say "for what?"
I say "Why not?" You've not managed to sort it out yet so its just another suggestion you could try.

[roberto2212]

1.contacted tech.support linksys,asus,tp-link with answer that is nothing wrong with my router or setup..I need contact my ISP idnet
2.contacted ea company (fifa17, nhl17), they checked my account with result no issue..I need contact my ISP inet
3.contacted idnet with result no issue on my network
4.checked on speedguide .net my network with result : MTU is not fully optimized for broadband. Consider increasing your MTU to 1500 for better throughput. If you are using a router, it could be limiting your MTU regardless of Registry settings.
5.checked my ps4 with sky (friend ISP)..no issue,all perfect like online gaming or streaming
6.rebooted modem,router, tryed factory reset, no help same issue
7.after factory reset I left all settings to default then on ps4 I setup easy connection to auto..result delay,lag games unplayable
8.tryed set static ip with dmz or static ip with port forwarding or static ip with upnp on..result: got delay and lag games unplayable
9.tryed swaping modem, routers ...same issue
10.checked microfilter all ok.
11.replace master socket to new version 5C mk4 https://www.youtube.com/watch?v=jbfHMsP6IsE ..same issue
12.I really dont understand where is problem because idnet no help me, ea company no help,routers support no help

[zappaDPJ]

If you open up your router to respond to ping requests and set up a thinkbroadband broadband quality monitor (I can't give you a direct link, the forum currently won't allow it), that might well help diagnose the nature of the problem.

[stevenrw]

You wrote:
Item 10. Checked microfilter - all ok.
I thought you said you were on FTTC? You MUST have microfilters for ADSL service.
You should NOT have microfilters on FTTC service.
So if you have PPPoE connection you are on FTTC.
When BT installed your modem they would have replaced your master socket. They should have unplugged (or advised you to unplug) all your microfilters. They are not required with the new BT socket.
You should REMOVE ALL microfilters.
Maybe this is the problem? Certainly worth a try.

[roberto2212]

thinkbroadband broadband quality monitor

I did this before and monitor looks ok..but i finded another problem.I checked again my socket and default was connected cable orange -A and white -B (BT engineer fitting)..so when I watched again this video  https://www.youtube.com/watch?v=jbfHMsP6IsE engineer presented the correct connection orange -B and white -A. It can be a problem? Anyway I swaped cable like engineer presented the correct connection orange -B and white -A but on speedguide.net still showed me MTU max.size 1460.I didnt checked online gaming.I will do this tomorrow and I will let you know.

[nowster]

Yes, with FTTC, the microfilter is built into the master socket. You must connect your modem directly to the upper RJ11 socket on the master socket, not via a microfilter into a phone socket.

[Lance]

Unless it is a self install in which case there will still be a microfilter.

[Lance]

Have you tried doing a trace rt and then pinging each hop with the do not fragment and size flags to work out where on the path the MTU is being limited?

[roberto2212]

Im not use microfilter.Using master socket 5c MK4.When I swaped wire, not make difference, got same ping,same speed,same mtu limited to 1460.

Have you tried doing a trace rt and then pinging each hop with the do not fragment and size flags to work out where on the path the MTU is being limited?

Yes I posted this result on http://forum.kitz.co.uk/index.php/topic,19140.0.html

Tested online gaming and still same result (delay 1 second)

[roberto2212]

This forum is waste of time.I tryed fix my issue by myself but unsuccessfully.Contacted idnet and asked why limited my mtu to 1460 with no answer.Asked if will fix this issue, again no answer.Asked if idnet can sending engineer for investigation, again no answer.If i know that idnet offering bad support then I will never switch to this poor provider.Im disappointed.Well, I think that idnet just looking only for own profit.So I will highly not recommended this poor provider.

[Simon]

This forum is waste of time.I tryed fix my issue by myself but unsuccessfully.Contacted idnet and asked why limited my mtu to 1460 with no answer.Asked if will fix this issue, again no answer.Asked if idnet can sending engineer for investigation, again no answer.If i know that idnet offering bad support then I will never switch to this poor provider.Im disappointed.Well, I think that idnet just looking only for own profit.So I will highly not recommended this poor provider.

There are plenty of people who would disagree with you that IDNet are a "poor provider".  And, with regards the forum being a "waste of time", no one here is a magician who can make your problem disappear, but there have been several people who have tried to help you with suggestions.  I spoke to IDNet personally, on 11th January, and they confirmed that they were looking into your issue, and that they had been in contact with you.

Good luck with finding a new broadband provider, and with resolving your problem.

[roberto2212]

Well, switched to sky ISP with result : on speedguide showed me correct mtu size 1500 then tested online gaming with no issue, no lag or delay. So problem solved with sky provider.So problem was on idnet side but unfortunatelly Idnet ignore this issue.Thanks all guys for reply.

[Tacitus]

Post Deleted

[Lance]

Are you on Sky LLU? Most likely you are so that shows the issues was somewhere in the BT network, and not necessarily IDNet.

[jaydub]

He was on IDNet and moved to Sky.  Bit of a weird problem and not sure how much it was worth worrying about, but the move to Sky resolved it.