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hio77
'That VDSL Cat'
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  #2177277 12-Feb-2019 18:24
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vulcannz:

 

gorringS:

 

try swapping to pcie lan controller. Intel tends to be best and set up with jumbo framing

 

 

You do know jumbo frame frames are for internal (LAN not internet) traffic right?

 

 

would be in reference to rfc4638 which many providers support





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Any comments made are personal opinion and do not reflect directly on the position my current or past employers may have.

 

 


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vulcannz
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  #2177377 12-Feb-2019 21:57
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hio77:

 

vulcannz:

 

gorringS:

 

try swapping to pcie lan controller. Intel tends to be best and set up with jumbo framing

 

 

You do know jumbo frame frames are for internal (LAN not internet) traffic right?

 

 

would be in reference to rfc4638 which many providers support

 

 

 

 

I don't know of any ISPs in NZ that support jumbo frames. Jumbo frames are somewhat pointless over WAN connections as they lose their efficiency. It also doesn't really matter what your ISP supports as it would extremely unusual for upstream routers to support jumbo frames (we have enough issues with packet loss already on standard frame sizes).

 

And the document you linked to is not concerned with jumbo frames over PPPoE, it is concerned where the default MTU of PPPoE is 1492 - and the LAN is using an MTU of 1500 - leading to potential packet fragmentation issues. And I will point out the maximum ethernet frame size is 1522, so jumbo frames are not required to achieve a 1500 packet size.

 

Did you actually read it?

 

There does seem to be a bastardized terminology floating around called Baby Jumbo Frames, which is not actually jumbo frames but a software setting that allows a great than 1500 bytes MTU size (ie 1508).


gorringS
71 posts

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  #2177383 12-Feb-2019 22:07
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I do actually read things and I have life outside of geek zone sorry if that doesn't impress you. Firstly the use of jumbo frames when enabled  will drop back to whatever is max available and other point that  seems have miss is adjusting the receive and send buffer from default 512kb to 2048kb which will result in much better though put than default settings. However biggest improvement is using dedicated NIC over onboard as most don't have specs to achieve short latest amd motherboards that have 10gig/bit by default.




vulcannz
436 posts

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  #2177423 13-Feb-2019 07:36
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If you try to route jumbo frames then MTU will force packet fragmentation. Packet fragmentation is bad. It will destroy performance.

 

I'm not sure what you mean by those buffer sizes, buffers are typically bigger than the packet sizes. Buffers can also be good and bad.

 

Modern onboard NICs are just fine for 1Gbps.

 

Jumbo frames are really designed and optimized for operations like SANs, NASs, moving big storage packets around.

 

I'm not sure why there is a fascination with having a 1500 byte MTU is. There is nothing wrong with dropping a bit lower, this often leads to better performance (latency, jitter, throughput) due to the inherit oddities of the many hops your packets have to route over. Some protocols like UDP actually suffer under large MTUs (UDP was design with a 256 byte packet size in mind).

 

My preferred MTU is 1420 with packet frag turned off (so LAN clients are also forced down to 1420). Though sometimes I will drop that to 1308. 


freakalad

231 posts

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  #2177431 13-Feb-2019 07:49
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I appreciate the help & discussion here

 

sparkz25:

 

freakalad:

 

sparkz25:

 

after some testing and a lot of homework a few of us took the plunge on these little pc's

 

...

 

Click to see full size

 

 

I took the plunge & got one of these ones too; higher end of the spec for a bit of future-proofing.

 

...

 

 

Have a tinker with the MTU, ours is set to 1508 for optimization.

 

what speed tests are you running, speed test app for windows? fast.com or speed test website?

 

Im getting an average of  700Mbps at the moment on all the apps/sites.

 

The thing thats letting us down at the moment is the PPPoE limitations with the nics on the these boxes, we are looking at implementing a BNG to allow us to ditch our suppliers PPPoE

 

...

 

 

MTU is sitting at default 1500, so can make a little teak there.

 

Will look into Jumbo Frames (odd, but can't hurt)

 

Using iperf, speedtest-cli & linetest.net for testing: (both on the gateway & LAN host)

 

`iperf -P 10 -t 30 -V -c akl.iperf.linetest.nz` (10 threads for 30 seconds)

 

Getting a max of 700-800 now, when the stars align & wind blows right. Still a little off from the 900+ I get on the ISP router, but edging closer in increments.

 

Considering this shiny new box has a surplus of NICs, I've set one up as PPPoE & the other as IPoE (vanilla DHCP with a VLAN tagged 10), and put them in a gateway group, so that if have fail-over from one to the other; that way I can just switch the UTP from one dedicated interface to the other to test different configs without needing to reconfig my system.
From what I can tell, you may actually have IPoE already available on your (Chorus UFB?) line, even if your ISP does not advertise the fact or explicitly support it. Worth a quick try?

 

 

 

Edit: typo 10 threads not 1





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gorringS
71 posts

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  #2177434 13-Feb-2019 08:01
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seems it better not to make statement here or even post there always one that tries to make sound like they know it all. In this case it not over whom know what how much it more about what works and what doesn't. My box here with 3 intel network cards can happy give results you should obtain when you have not one but two gigabit fibre connections connected to it. Yes my 10gig/bit internal lan allows me to see what my properly configure loading balancing does. Usuage each month is exactly same on both accounts so it doing exactly as intended. 1900megabit down and 1100 megabit up when load balancer is engaged. Far other technical crap you posting my thoughts are go back to school no one wants to see  that you got more time on hands to waste typing  . With that I wont be responding any further to his subject as it obvious to me it not going  any were . 


freakalad

231 posts

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  #2177460 13-Feb-2019 08:48
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gorringS:

 

...Far other technical crap you posting my thoughts are go back to school no one wants to see  that you got more time on hands to waste typing  . With that I wont be responding any further to his subject as it obvious to me it not going  any were . 

 

 

That may be for the best; the intent here was to pick other local's brains for tweaks to be had to get the best out of a line, and already it has borne positive results.  

 

If you don't have anything constructive to contribute (yes, some of your earlier comments were useful, but not the latter), please refrain from baiting arguments.

 

I can only guess that you're not having a great morning, rather than assume ill-will.





FLOSS'er, aspiring Maker




vulcannz
436 posts

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  #2177509 13-Feb-2019 10:43
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I'd just like to point out my comment about reading the RFC was in reply to Hio. So I'm not sure why gorringS is getting mad about it?

 

gorringS my job is in security, with a specialization in firewalls (multiple products) up to enterprise level - I am simply sharing my knowledge. 


freakalad

231 posts

Master Geek


  #2178083 14-Feb-2019 09:21
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I've got what seems a pretty stable setup now (IPoE atm, optional PPPoE available). I still need to do some additional fine-tuning (eg. MTU maxes out at 1500 for IPoE, 'something' in the setup not allowing me to push MTU for IPoE connection to 1508), digging into RFC spec, but that'll have to wait until I have more time again, but I'll report back on my own findings.

 

Current results are pretty good - better than average & FAR better than before - but a little bit all over the map.

 

 

 

From LAN host: (up/down)

 

* fast.com seems to give overly-optimistic results, seems deeply flawed: 790 Mbps/560 Mbps, 2.3 Gbps/920 Mbps, 11 Gbps/840 Mbps
* linetest.nz : 737.0 Mbps/508.0 Mbps
* `speedtest-cli`: 804.31 Mbps/452.56 Mbps
* `iperf -c akl.iperf.linetest.nz -P 10 -t 15 -u -b 1g` (UDP): 1.67 GBytes @ 958 Mbps
* `iperf -c akl.iperf.linetest.nz -P 10 -t 15 -b 1g` (TCP): 786 MBytes @ 423 Mbits/sec

 

 

 

From gateway:

 

* `speedtest-cli`: 314.61 Mbps/341.18 Mbps, 713.00 Mbps/249.07 Mbps, 857.29 Mbps/404.63 Mbps
* `iperf -c akl.iperf.linetest.nz -P 10 -t 15 -u -b 1g` (UDP): 17.4 GBytes @ 9.97 Gbps
* `iperf -c akl.iperf.linetest.nz -P 10 -t 15 -b 1g` (TCP): 719 MBytes @ 398 Mbits/sec 

 

 

 

TL/DR: Result better but still wild @ 400-960 Mbps





FLOSS'er, aspiring Maker


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