[Linux-aus] strange LAN congestion problem

[Stephen Argent]

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As far as recommendations for a Linux router go, I've had a lot of success with the MikroTik gear - and its relatively cheap. That is provided you're not gonna make your own, and are after a home router style device. Just a recommendation anyway :)

- -Stephen

- --
Sent from my Android device.

On 16 June 2014 14:47:40 GMT+09:30, Nick Edwards <nick.z.edwards at gmail.com> wrote:
>Thanks Kevin,
>Will give that a go when it next happens, amazing how such junk can
>bring such a powerful capable network to its knees, guess you do get
>what you pay for.
>
>I am trying some different sysctl values that was suggested, has to be
>cheaper than getting a cisco switch heh, or altering the links and
>putting the big files on dropbox or some such thing.
>
>
>On 6/16/14, Kevin Maciunas <kevin at cs.adelaide.edu.au> wrote:
>> I've seen this sort of behavior caused by lack of buffer depth on the
>> switch.  As a recycled network person, my first reaction would be to
>> dust off wireshark and observe the behavior on the ethernet.
>>
>> The setup I've played with that exhibited this in spades was a
>netgear 5
>> port switch.  This linked some scientific instrumentation that was
>> almost sync'd - and would send a burst of data every 1 second.  The
>> chaos that ensued brought the Gbit network to its knees.  I suspect
>in
>> the consumer grade switch side of the kit you're using, the buffering
>on
>> the links is very minimal and this is causing the train wreck
>upstream.
>> (The usual fall back to slow start etc etc...)  Wireshark is probably
>> your friend in this case.
>>
>> My $0.02.
>> /Kevin
>>
>> --
>> Kevin J. Maciunas              Net: kevin at cs.adelaide.edu.au
>> Dept. of Computer Science      Ph : +61 8 8313 5845
>> University of Adelaide         Fax: +61 8 8313 4366
>> Adelaide 5005 SOUTH AUSTRALIA  Web:
>http://www.cs.adelaide.edu.au/~kevin
>> Fingerprint = 7E5A A0C2 22BC 5993 17F2 93CE B1FD DEC6 D0C0 50CD
>>
>>
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>>
>
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