[Asterisk-Users] TE410P Errors under load

[Scott Stingel]

For the benefit of others who may experience this  (multiple frame
rejections and PRI "read" errors under high IVR call volume- E1
circuits)....

I've discussed this with Mark at Digium, and he's called into my system.
There may be a problem with PRI software frame buffering with a high volume
of call setups.  I will create a bug report so that this can be tracked.

In the meantime, if possible I'd like to verify this problem on another
system.  If anyone has a TE410P and would like to try my load tester on
their system, could you please contact me *off-list*, and I'll send you my
call generation Perl script for you to try.  You would need one E1 crossover
cable:  (This is simple to construct from a CAT5 Ethernet patch cable).  I
can make the problem occur with only 30 sending and receiving channels on
the same system... THANKS!

Thanks to Mark and Martin for their help on this.

Scott M. Stingel 
Emerging Voice Technology Inc.

scott at evtmedia.com
   
URL:            www.evtmedia.com   



> -----Original Message-----
> From: asterisk-users-admin at lists.digium.com 
> [mailto:asterisk-users-admin at lists.digium.com] On Behalf Of 
> Mark Spencer
> Sent: Friday, November 21, 2003 9:36 PM
> To: asterisk-users at lists.digium.com
> Subject: Re: [Asterisk-Users] TE410P Errors under load
> 
> 
> Again, can you please confirm you are neither running serial 
> console *nor*
> graphical console (e.g. framebuffer).  If you can call into 
> the office we
> can ssh in and take a look at the configuration.
> 
> Mark
> 
> On Fri, 21 Nov 2003, Scott Stingel wrote:
> 
> > (Apologies: starting this as a new thread - I'm in a new location.)
> >
> > Mark-
> >
> > Ran latest CVS from today, and sorry to report little 
> improvement with the
> > changes you made.  Running my IVR load test from one span 
> to another on same
> > system.
> >
> > I'm initiating calls on the 2nd span, these are channels 
> 32-62 (skipping the
> > D channel 47), and receiving on the cooresponding channels 
> on the 1st span,
> > channels 1-31 (D channel is 16).  When I run these 30 
> channels, I get
> > hundreds of WARNING's (excerpt below).  I'm using a short 
> crossover cable
> > (1,2 <=> 4,5)
> >
> > When I run only 10-15 channels, I get few or no WARNING's...
> >
> > Note read error on channel 252(?)
> > Why is asterisk retransmitting so many frames on each error?
> >
> > These symptoms are identical to those that I've been getting from my
> > customer in the field, while connected to a DMS-100, 
> handling real traffic.
> >
> > THANKS
> > Scott
> >
> > WARNING[1167272128]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: Read on
> > 252 failed: Unknown error 500
> > WARNING[1167272128]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: Read on
> > 252 failed: Unknown error 500
> > WARNING[1167272128]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: Read on
> > 252 failed: Unknown error 500
> > WARNING[1167272128]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: Read on
> > 252 failed: Unknown error 500
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: Read on
> > 253 failed: Unknown error 500
> > WARNING[1167272128]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: Read on
> > 252 failed: Unknown error 500
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: Read on
> > 253 failed: Unknown error 500
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: !! Got
> > reject for frame 97, retransmitting frame 97 now, updating n_r!
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: !! Got
> > reject for frame 97, retransmitting frame 98 now, updating n_r!
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: !! Got
> > reject for frame 97, retransmitting frame 99 now, updating n_r!
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: !! Got
> > reject for frame 97, retransmitting frame 100 now, updating n_r!
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: !! Got
> > reject for frame 97, retransmitting frame 101 now, updating n_r!
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: !! Got
> > reject for frame 97, retransmitting frame 102 now, updating n_r!
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: !! Got
> > reject for frame 97, retransmitting frame 103 now, updating n_r!
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: !! Got
> > reject for frame 97, retransmitting frame 104 now, updating n_r!
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: !! Got
> > reject for frame 97, retransmitting frame 105 now, updating n_r!
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: !! Got
> > reject for frame 97, retransmitting frame 106 now, updating n_r!
> > WARNING[1175660608]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: !! Got
> > reject for frame 97, retransmitting frame 107 now, updating n_r!
> > WARNING[1167272128]: File chan_zap.c, Line 5716 
> (zt_pri_error): PRI: Read on
> > 252 failed: Unknown error 500
> > -------------------------------------------------------------------
> >
> > Scott M. Stingel
> > Emerging Voice Technology Inc.
> > Palo Alto, California and London, England
> >
> > URL:            www.evtmedia.com
> >
> > _______________________________________________
> > Asterisk-Users mailing list
> > Asterisk-Users at lists.digium.com
> > http://lists.digium.com/mailman/listinfo/asterisk-users
> >
> 
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