[rancid] rancid "losing" characters

[Stephen Griffin]

We had reduced the send_human timers because of internal user complaints
that it was too slow. I went back to the stock value and it dramatically
reduced (although didn't eliminate entirely) the lost characters, so it
appears to be buffer overflows. It is just odd because the older version we
had didn't (ttbomk) use send_human.

Stephen


On Wed, Oct 16, 2013 at 3:28 PM, heasley <heas at shrubbery.net> wrote:

> Mon, Oct 07, 2013 at 10:30:02AM -0400, Stephen Griffin:
> > So, I have a version of rancid 2.3.8 installed, and I've been noticing on
> > some of our Foundry/Brocade gear that some commands are failing because a
> > character is lost.. for example, skip-page-dilay instead of
> > skip-page-display.
> >
> > Our prior version of rancid was quite old (so old that no one really was
> > quite sure of what version it was), and we don't recall seeing this
> > behaviour. It feels like a buffer being exhausted, but 2.3.8 uses
> > send_human, which should be slowing things down.
> >
> > The version of expect wasn't changed, and is 5.43.0
> >
> > We did fold in some of our older custom changes, but I have a difficult
> > time believing those would impact lost characters.
> >
> > Has anyone run into this or something similar?
>
> there once was a problem with hpuifilter that caused this, but that would
> not affect foundry, only hp/hlogin.  perhaps that was part of your changes?
>
> otherwise, i'd suspect expect.
>
> > I did a test run, by sending "show 802" to a bunch of devices, and came
> up
> > with:
> >       1 e
> >     145 exit
> >       1 sh
> >       1 show 02
> >       1 show 80
> >     145 show 802
> >       1 show802
> >       1 skip-page-ay
> >     148 skip-page-display
> >
> > Thanks,
> > Stephen
> > --
> > Stephen A. Griffin
> > Network Engineer
> > Google Acquisition Netops
>
> > _______________________________________________
> > Rancid-discuss mailing list
> > Rancid-discuss at shrubbery.net
> > http://www.shrubbery.net/mailman/listinfo/rancid-discuss
>
>


-- 
Stephen A. Griffin
Network Engineer
Google Acquisition Netops
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