[PLUG] network traffic shaping for servers

[Patrick J. Timlick]

I found Russell's insights, and the wikipedia articles that he referenced
interesting and helpful.  Reference 14 of Bufferbloat article led me to
http://netalyzr.icsi.berkeley.edu/ .  Netalyzr opined that I had excessive
buffering on my now deprecated Wrt54GL running Tomato 1.25 .  Netalyzr also
revealed other actionable items.  Recommended.  Well worth the what I paid
for it: nothing, except waiting a few minutes for results.   -- Pat


On Sat, Feb 22, 2014 at 3:31 PM, Russell Senior
<russell at personaltelco.net>wrote:

> >>>>> "Keith" == Keith Lofstrom <keithl at gate.kl-ic.com> writes:
>
> Keith> 2) I run a Personal Telco access point, and am glad to serve my
> Keith> community.  However, sometimes my guests use up most of my
> Keith> bandwidth.  Is there an easy way to thottle the bandwidth
> Keith> feeding the access point (it is by itself on a private DMZ) to
> Keith> a reasonable fraction of my FIOS feed, say to 3mbps?
>
> [Keith has a homebrew PTP node, not our standard firmware kit]
>
> You can only throttle outbound traffic, you have no control over the
> order of what is sent to you.  Our experience is that you really only
> notice other people's traffic when you have a bufferbloat
>
>   https://en.wikipedia.org/wiki/Bufferbloat
>
> latency problem on the outbound queue, which "feels" slow because your
> transmissions are having to wait in a long line to get out.  So, look
> for upstream saturation.  Graphing the traffic volumes in something
> like Cacti or Munin can help diagnosing the problem.  Other tools like
> iftop can help figure out where the traffic is coming from.  Running a
> modern kernel with CoDeL can help too.
>
>   https://en.wikipedia.org/wiki/CoDel
>
>
> --
> Russell Senior, President
> russell at personaltelco.net
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>



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