[BBLISA] slow wan link

[Kress F]

It may not be a direct buffer bloat problem, but the berkeley tool to
identify buffer bloat gives a lot of useful info, maybe helpful to you in
your troubleshooting if you have not yet used it (or something similar):

http://netalyzr.icsi.berkeley.edu/index.html

cheers!
Kress

On Wed, Jun 6, 2012 at 8:53 PM, Daniel Hagerty <hag at linnaean.org> wrote:

> Daniel Feenberg <feenberg at nber.org> writes:
>
> > I have difficulty reconciling these facts. If pings are fast and packets
> > are not dropped, why do users see problems? I can confirm things seem
> > slow. Is this the dreaded "buffer bloat" problem so recently hyped? Is
> > there anything I can do here to aleviate it while waiting for more
> > bandwidth?
>
>     I agree, it doesn't quite add up.  Bufferbloat would show up with
> slow ping, or other slow real time apps.  Try interactive ssh over the
> suspect link and see what your fingers tell you about round trip times.
>
>    It's possible that the link has a really snazzy queueing setup with
> buffering issues within it.  The theory here would be that the ping
> you're running is hitting a small queue, but the traffic your users
> actually care about are all hitting an overfull one.
>
>    I've solved problems like this in the past with clever queueing, but
> it's not clear that this is your problem.
>
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