[olug] Network performance analysis

[Noel Leistad]

To me, lagging after click sounds like DNS issues (amongst other
things...), quick and easy on the DNS is:

https://www.grc.com/dns/benchmark.htm

It should at least help find out if is a resolver issue.

Noel



On 11/20/2014 02:35 PM, Bill Brush wrote:
> Rob I'm painfully (agonizingly) aware of how many variables I'm
> dealing with here.
>
> To go into a little more detail, the raw speed seems fine for the most
> part.  We're seeing some traffic spikes on the internet link up to the
> limit, but it's rarely sustained.  A speed test at speedtest.net
> usually comes back at around 90% of our nominal speed for our link.
>
> The main "symptom" seems to be a lag in things starting to move.  So
> if you click a link it sits there and thinks about it, then moves.
> Sometimes this is a few seconds, sometimes it's over a minute.
>
> I'm going to set up a 30 day trial of Solarwinds bandwidth analysis
> pack and hopefully it will show me something.  My forays with
> Wireshark have not turned up anything obvious.
>
>
> On Thu, Nov 20, 2014 at 2:22 PM, Rob Townley <rob.townley at gmail.com> wrote:
>> Bill,
>>
>> i feel your pain.
>>
>> Keep in mind "slowness" can be caused at many layers of the network.
>>
>> -physical tests to verify Cat6 compliance from (PC) patch cable to wall
>> plate thru cable run back to patch panel thru another patch cable ( network
>> switch).  This could be an electrician with a ~$2500.00? Cat6 tester.  $per
>> wall plate
>>
>> -firmware on NIC / motherboard
>>
>> -device driver version
>>
>> -10Mbps half-duplex vs 1000Mbps FullDuplex
>>
>> -switch
>>
>> -vPro / IPMI
>>
>> -IPv6 vs IPv4 issues
>>
>> -DNS slowness or timing out
>>
>> -router
>>
>> -wireless channel (1 ,6, 11)
>> On Nov 20, 2014 12:20 PM, "Bill Brush" <bbrush at gmail.com> wrote:
>>
>>> Hello all.
>>>
>>> I don't post much, but I've been lurking around here for many years.
>>>
>>> I'm looking for help investigating complaints that our network is
>>> "slow".  I have a rudimentary knowledge of doing packet captures, and
>>> the basics, but an in-depth investigation is beyond my current skills.
>>>
>>> I inherited this network a couple years ago, and I will freely admit
>>> that prior to this I had never had to worry about my infrastructure so
>>> I have not checked for pre-existing issues.
>>>
>>> So is anyone in the Omaha area an expert at network analysis?  If it's
>>> your day job we can discuss your hourly rates.
>>>
>>> Thanks!
>>> Bill
>>> _______________________________________________
>>> OLUG mailing list
>>> OLUG at olug.org
>>> https://lists.olug.org/mailman/listinfo/olug
>>>
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