[olug] Network performance analysis

[Bill Brush]

Thanks for the link to that tool.  It seems to have given me its stamp
of approval though.

On Thu, Nov 20, 2014 at 3:28 PM, Noel Leistad <noel at metc.net> wrote:
> 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
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>
>
> --
> #######################################################
> #  Noel Leistad, CISSP                                #
> #  Internet System Administrator                      #
> #  Marne & Elk Horn Telephone Co                      #
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