N4L schools, max bandwidth?

[Craig Knights]

Hi all,

Just doing some chasing down causes of a "The Internet's Slow" gripe from our staff...

Looking on Pond's graphs https://www.pond.co.nz/managed-network we don't seem to hit the maximum, although our connection feels busy to me...  we get to 70Mb/s at the busiest

Do you get anywhere near your supposed limit?  Our connection is 100Mb/s, we have 520 or so students.

thanks,
Craig

[Alistair Baird]

We've never had 100Mb, 75Mb is about normal for us. Just done some speedtests and my laptop is getting 60Mb at the desk from Sydney to Palmerston North

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Alistair Baird

IT Manager

St Peters College 

p 06 354 4198

m 021 990 259

e bai...@stpeterspn.school.nz

[Tim Harper]

These are our graphs - we have a 500 Mb/s connection and 850 students.  These are provided from a local Cacti server that monitors traffic through the switch port connected to the N4L router.  The 5 second averages from the real time graph can vary quite markedly with the longer averages on the other graphs.

1.  Realtime right now (well since 12:05 anyway!):

2.  Summary Graphs:

I would have run a speedtest off my machine but the gig interface on the motherboard died a while back and I stuck in an old 100Mb/s card to keep it going.  Thus there's not much point!

regards,

Tim Harper


Phone 03 443 5167 (messages cannot be left on this number)
Mobile 027 443 1236

t...@mtaspiring.school.nz
www.mtaspiring.school.nz

[Bevan McNaughton]

Our graphs show no data so am unsure (500MBps connection here).. We roll off REANNZ at the end of the month for our remaining routes so it will be a real test then..

Bevan

Bevan McNaughton

Intranet Manager

MCP, MTCNA, CAP, Google Ed.

Southland Girls' High School

328 Tweed Street

Invercargill 9812

Phone: +64 3 211 6030

Fax:     +64 3 216 9010

Mobile: 027 223 2144

[Gerard MacManus]

Is your raspberry pi plugged in.

Gerard MacManus

Hobsonville Point Secondary School

On 21/06/2016, at 12:28 PM, Bevan McNaughton <bevan.mc...@southlandgirls.school.nz> wrote:

Our graphs show no data so am unsure (500MBps connection here).. We roll off REANNZ at the end of the month for our remaining routes so it will be a real test then..

<image.png>

Bevan

On 21 June 2016 at 12:16, Tim Harper <t...@mtaspiring.school.nz> wrote:

These are our graphs - we have a 500 Mb/s connection and 850 students.  These are provided from a local Cacti server that monitors traffic through the switch port connected to the N4L router.  The 5 second averages from the real time graph can vary quite markedly with the longer averages on the other graphs.

1.  Realtime right now (well since 12:05 anyway!):

<image.png>

2.  Summary Graphs:

<image.png>

I would have run a speedtest off my machine but the gig interface on the motherboard died a while back and I stuck in an old 100Mb/s card to keep it going.  Thus there's not much point!

regards,

Tim Harper


Phone 03 443 5167 (messages cannot be left on this number)
Mobile 027 443 1236

t...@mtaspiring.school.nz
www.mtaspiring.school.nz

On 21 June 2016 at 11:49, Alistair Baird <bai...@stpeterspn.school.nz> wrote:

We've never had 100Mb, 75Mb is about normal for us. Just done some speedtests and my laptop is getting 60Mb at the desk from Sydney to Palmerston North

On 21 June 2016 at 11:05, Craig Knights <craig....@gmail.com> wrote:

Hi all,

Just doing some chasing down causes of a "The Internet's Slow" gripe from our staff...

Looking on Pond's graphs https://www.pond.co.nz/managed-network we don't seem to hit the maximum, although our connection feels busy to me...  we get to 70Mb/s at the busiest

Do you get anywhere near your supposed limit?  Our connection is 100Mb/s, we have 520 or so students.

thanks,
Craig

<image.png>

[Clayton Hubbard]

Hi Bevan 

I will look into why your graphs are not working.

Clayton

--
Clayton Hubbard
Senior Engineer
0220430155

[Bevan McNaughton]

Hi Clayton. Thanks. Have logged a job with support as well - EDGE is very slow of late and it's not MUSAC's end apparently..

[Craig Knights]

OK, so the staff have been emailing all day when they have internet speed issues..

A lot have issues with Kahoot quizzes.  Has anyone else seen that Kahoot is especially picky about internet latency?

I've been digging into some reports off the N4L log, and I'm not seeing much excessive use..

ta

Craig

[Andrew Godfrey]

Have you got any other device between your core switch and N4L router? We were having terrible trouble with a Juniper router/firewall that wasn't handling the number of devices trying to access the internet at one time.

Try running speedtest on half a dozen devices at the same after students have left and see whether you can push that 100MB connection. (Our 500 connection will max out at about 430 - if the ratio is proportional at lower speeds then you should be able to get about 85).

_______________________________________

 

Andrew Godfrey  |  Network Manager

On 21 June 2016 at 11:05, Craig Knights <craig....@gmail.com> wrote:

--

[Mike Etheridge]

Yep. Kahoot latency an issue. When I look at a graph of delay times, there is a lot of jitter

Before N4L, on same fibre, delay was pretty even. I’m not saying the delay is unacceptable, but the jitter is interesting.

On 21/06/2016, at 1:48 PM, Craig Knights <craig....@gmail.com> wrote:

OK, so the staff have been emailing all day when they have internet speed issues..

A lot have issues with Kahoot quizzes.  Has anyone else seen that Kahoot is especially picky about internet latency?

I've been digging into some reports off the N4L log, and I'm not seeing much excessive use..

ta

Craig

On Tue, Jun 21, 2016 at 1:01 PM, Bevan McNaughton <bevan.mc...@southlandgirls.school.nz> wrote:

Hi Clayton. Thanks. Have logged a job with support as well - EDGE is very slow of late and it's not MUSAC's end apparently..

On 21 June 2016 at 12:42, Clayton Hubbard <clayton...@n4l.co.nz> wrote:

Hi Bevan 

I will look into why your graphs are not working.

Clayton

On Tuesday, 21 June 2016, Bevan McNaughton <bevan.mc...@southlandgirls.school.nz> wrote:

Our graphs show no data so am unsure (500MBps connection here).. We roll off REANNZ at the end of the month for our remaining routes so it will be a real test then..

<image.png>

Bevan

On 21 June 2016 at 12:16, Tim Harper <t...@mtaspiring.school.nz> wrote:

These are our graphs - we have a 500 Mb/s connection and 850 students.  These are provided from a local Cacti server that monitors traffic through the switch port connected to the N4L router.  The 5 second averages from the real time graph can vary quite markedly with the longer averages on the other graphs.

1.  Realtime right now (well since 12:05 anyway!):

<image.png>

2.  Summary Graphs:

<image.png>

I would have run a speedtest off my machine but the gig interface on the motherboard died a while back and I stuck in an old 100Mb/s card to keep it going.  Thus there's not much point!

regards,

Tim Harper


Phone 03 443 5167 (messages cannot be left on this number)
Mobile 027 443 1236

t...@mtaspiring.school.nz
www.mtaspiring.school.nz

On 21 June 2016 at 11:49, Alistair Baird <bai...@stpeterspn.school.nz> wrote:

We've never had 100Mb, 75Mb is about normal for us. Just done some speedtests and my laptop is getting 60Mb at the desk from Sydney to Palmerston North

On 21 June 2016 at 11:05, Craig Knights <craig....@gmail.com> wrote:

Hi all,

Just doing some chasing down causes of a "The Internet's Slow" gripe from our staff...

Looking on Pond's graphs https://www.pond.co.nz/managed-network we don't seem to hit the maximum, although our connection feels busy to me...  we get to 70Mb/s at the busiest

Do you get anywhere near your supposed limit?  Our connection is 100Mb/s, we have 520 or so students.

thanks,
Craig

<image.png>

[Sam McNeill]

I think you'll find that whatever your on-prem core switch or router monitors is likely to be far more accurate than what the upstream stats show, largely because Cacti (and others) smooth out this data over 1-5min intervals thus dropping your bursting peaks. 

Our bandwidth is just starting for the day but you can see the difference already.

This is on our Fortigate firewall - note quite a few peaks over 200Mb

This is our ISP's Cacti graphing for the same period (we use 2Degrees, formerly Snap) - note the peak at 181Mb

We would routinely run between 200-300Mb/s during class time based off the Cacti graphing, but on the fortigate this will peak over 400Mb/s

Cheers

Sam

[Kevin Whelan]

We have a similar sized school and were sent the standard 1ru cisco box deployment which to me looked massive but the installer told me that it wouldn't cope with what we would need and he would undoubtedly be back to replace it for the larger 3 ru model once things settled in and we complained a bit. Said they had spent so much rework going back and adding ram etc to various schools and in the end changing the router.
Changing it made the world of difference,apparently the unit was maxing out at 100%cpu but you can't see that from our end.

[Patrick Dunford]

All our schools with similar rolls got 3RU unit straight out of the box :)

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[Craig Knights]

Yes we've had the RAM upgrade, and then a year ago had the 3U router installed..

I'm trying to pin down the issues to WAN, LAN or Wireless...  but it's slow going..

ta

Craig

--

[Peter Lambrechtsen]

On Jun 22, 2016 10:23 AM, "Craig Knights" <craig....@gmail.com> wrote:
>
> Yes we've had the RAM upgrade, and then a year ago had the 3U router installed..
>
> I'm trying to pin down the issues to WAN, LAN or Wireless...  but it's slow going..

IPerf is an excellent tool. I've got a fair amount of experience in this area. Happy to let you iperf off one of my machines that has a 1gb symmetrical connection plumbed into the Spark core.

Speedtest.net has issues on lower grade machines doesn't work well unless you install an ad blocker. I prefer chrome or Firefox.

> ta
> Craig
>
>
> On Wed, Jun 22, 2016 at 9:03 AM, Kevin Whelan <kwhel...@gmail.com> wrote:
>>
>> We have a similar sized school and were sent the standard 1ru cisco box deployment which to me looked massive but the installer told me that it wouldn't cope with what we would need and he would undoubtedly be back to replace it for the larger 3 ru model once things settled in and we complained a bit. Said they had spent so much rework going back and adding ram etc to various schools and in the end changing the router.
>> Changing it made the world of difference,apparently the unit was maxing out at 100%cpu but you can't see that from our end.
>>
>>
>> On Tuesday, June 21, 2016 at 11:05:35 AM UTC+12, craig.knights wrote:
>>>
>>> Hi all,
>>>
>>> Just doing some chasing down causes of a "The Internet's Slow" gripe from our staff...
>>>
>>> Looking on Pond's graphs https://www.pond.co.nz/managed-network we don't seem to hit the maximum, although our connection feels busy to me...  we get to 70Mb/s at the busiest
>>>
>>> Do you get anywhere near your supposed limit?  Our connection is 100Mb/s, we have 520 or so students.
>>>
>>> thanks,
>>> Craig
>>>
>>>
>>>

[Craig Knights]

Yes I've been iperf-ing a lot..  checking switches and inter-building links and the performance of various wireless access points..  back to my machine connected to our core switch.

I might drop you an email tomorrow...

thanks

Craig