Re: Modem slowdown after hamm upgrade?
I too have noticed a ppp slow down on my bo system. A while back I
updated a bunch of packages, and I think ppp was one of them. Here is
what I think I know about that, even though I dont understand it.
I think that /etc/ppp/options used to have:
mru 542
That line is commented out in the most recent bo ppp package.
I tried to uncommenting 'mru 542' in /etc/ppp/options, but cant establish
a ppp link with that setting.
I know that mru has been setable in the past and a setting of 542 has
given much better performance for me than the default of 1500.
I dont know if my problem is related to yours, but both look possibly ppp
version related.
Mike
On Tue, 30 Jun 1998, Simon Blake wrote:
> Hi there
>
> I've a dual PPro unit that has been a 33K6 PPP PAP dialin server for the
> last year (hamm for the last 3 months), and worked fine, so long as I ran
> pppd v2.2 - I kept the old binary lying around and just symlinked it back
> in after every ppp update from hamm, because the v2.3 binary didn't work,
> and I couldn't be bothered working out why :-).
>
> Since installing the hamm beta a few days back, my PPP performance has
> plummeted - everything still works, but I get ~1Kbps rather than the
> ~33Kbps I'd normally see. Since then I've tried 2.0.34 with ppp 2.2, and
> 2.1.107 with ppp 2.3.5, to no avail. Everything seems to work fine (users
> authenticate OK etc), just deathly slow. There are two modems in the box,
> showing identical behaviour (both are setserial'd to spd_vhi, and both
> are set to 115200 in the ppp options file), and a 14K4 in another hamm
> machine shows similar poor performance.
>
> >From my (hamm) box at home, with a 56K modem, connected to a local 56K
> ISP, I get (running 'pppstats -w 10' while an FTP is going on):
>
> IN PACK VJCOMP VJUNC VJERR | OUT PACK VJCOMP VJUNC
> 47905 35 35 0 0 | 268 19 18 0
> 47981 36 35 0 0 | 213 20 19 0
> 49461 38 36 0 0 | 269 19 18 0
> 47981 36 35 0 0 | 258 18 17 0
> 49038 35 35 0 0 | 201 19 18 0
>
> Same machine dialed into the 33K server at work, with an FTP happening:
>
> IN PACK VJCOMP VJUNC VJERR | OUT PACK VJCOMP VJUNC
> 1029 3 2 0 0 | 94 2 1 0
> 1017 2 2 0 0 | 120 4 2 0
> 0 0 0 0 0 | 0 0 0 0
> 509 1 1 0 0 | 94 2 1 0
> 508 1 1 0 0 | 26 2 1 0
>
> I have no idea what is going on here - that's a 10 second gap when nothing
> happened at all! I've also run a test with minicom and sz, and that
> showed similar performance - around the ~1Kbps mark, so I'm pretty
> confidant the problem doesn't lie with ppp, rather that something has
> changed in the serial port or mgetty setup in the new system?
>
> Any ideas welcome - my users are about to send out the lynch mob, and the
> idea of moving the modems back to a bo box doesn't really appeal.
>
> TIA
>
> Cheers
> Si
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