nanog mailing list archives

Re: Network management software with high detailed traffic report


From: Sergey Voropaev <serge.devorop () gmail com>
Date: Fri, 26 Nov 2010 11:45:38 +0300

We are using cisco switches like as 3750, 6500 etc. So there is no
fairqueue.

On 26 November 2010 09:43, Mikael Abrahamsson <swmike () swm pp se> wrote:

On Fri, 26 Nov 2010, Sergey Voropaev wrote:

 We use a several connections to the financial providers. This connections
are low bandwidth (up to 2 Mbps). This connections used by a number of
front
end services from a nubmer of departments and we could not differentiate
its
and configure QoS. But from time to time some one produce an extremely
 high
traffic spikes (less than 30 seconds) without congestion avoidance
mechanisms. Our task - is to find such applications and report to
management
and developers a problem. Also if we'll be aware about it we could
configure
QoS.


What kind of queuing are you using?

It sounds like configuring fair-queue on the interface (if your platform
supports that, usually the ones with 2M interfaces do), it should help with
the problem you're describing.

If you have CPU to spare, configure fair-queue everywhere you can where you
don't have a "better" QoS-configuration in place. It really solves a lot of
the problems people are seeing with FIFO and mixed traffic.

--
Mikael Abrahamsson    email: swmike () swm pp se



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