> From: "William Bauer" <bbauer@scripps.edu> > Date: Fri, 20 Jun 1997 11:18:04 -0700 > Subject: (ASCEND) P25 failures > > Does anyone know what causes the error: > > Power-On > Self Test > Halted. > CONFIGURE UNIT! > > I've had two P25s fail with this error, and nothing restores it, including an > nvramclear. Is there something on the ISDN or ethernet side of the connection > that could cause this kind of failure? Bad ethernet port on a computer, or > stray signals coming from the Pac Bell end of the cables? > Basically your P25 has lobotomized itself. Its program most likely went haywire and allocated buffers into protected RAM and wiped out the unit's serial number and other factory configured info. This failure is usually caused by running a P25 on a busy network segment with Ethernet->Mod Config->Bridging=Yes Why does this happen? Especially to 2 units in a row? We found through test and experimentation that when bridging is enabled at the ethernet level the P25 attempts to process every packet it sees on the ethernet. It will do this even if there are no connection profiles configured to bridge (figure that). The processor/software in a P25 cannot keep up with the traffic on a busy ethernet. This can be an ethernet segment with just 2 Unix boxes running NFS or performing network file copies, or it can be a network of several systems. All it takes is one good blast of ethernet traffic when bridging is enabled on the P25 and it will usually lobotomize itself. Even when it doesn't lobotomize itself it will usually reset. All you need to do is turn bridging off at the ethernet configuration and the problem should not re-occur. We have several P25s running in busy networks for the last year with bridging disabled without any problems. Now if you need bridging and you are on busy ethernet segments I suggest that you get a P50 or 75. BTW, once a P25 lobotomizes itself it has to be sent back to Ascend. Only they know how to plug in the special hash codes and such to reprogram the serial number and factory options. --- =========================================================================== Bob Atkins, President | bob@digilink.net Digilink Network Services | <A HREF="http://www.DigiLink.Net/">http://www.DigiLink.Net/</A> Switched ISDN Internet Access | <A HREF="mailto:info@DigiLink.Net">mailto:info@DigiLink.Net</A> 310-577-9450 "Our business is your network" =========================================================================== The man who follows the crowd will usually get no further than the crowd. The man who walks alone is likely to find himself in places no one has ever been. -- Alan Ashley-Pitt ++ Ascend Users Mailing List ++ To unsubscribe: send unsubscribe to ascend-users-request@bungi.com To get FAQ'd: <<A HREF="http://www.shore.net/~dreaming/ascend-faq">http://www.shore.net/~dreaming/ascend-faq</A>> or <<A HREF="ftp://ftp.shore.net/members/dreaming/ascend-faq.txt">ftp://ftp.shore.net/members/dreaming/ascend-faq.txt</A>> </PRE> <!--X-MsgBody-End--> <!--X-Follow-Ups--> <!--X-Follow-Ups-End--> <!--X-References--> <!--X-References-End--> <!--X-BotPNI--> <HR> <UL> <LI>Prev by Date: <STRONG><A HREF="msg05761.html">Re: (ASCEND) K56flex connection rates...</A></STRONG> </LI> <LI>Next by Date: <STRONG><A HREF="msg05759.html">(ASCEND) Used MAX1800 wanted</A></STRONG> </LI> <LI>Prev by thread: <STRONG><A HREF="msg05749.html">Re: (ASCEND) P25 failures</A></STRONG> </LI> <LI>Next by thread: <STRONG><A HREF="msg05744.html">(ASCEND) HTML docs for Max (5.0a) and TNT (1.2a)</A></STRONG> </LI> <LI>Index(es): <UL> <LI><A HREF="mail125.html#05760"><STRONG>Main</STRONG></A></LI> <LI><A HREF="thrd51.html#05760"><STRONG>Thread</STRONG></A></LI> </UL> </LI> </UL> <!--X-BotPNI-End--> <!--X-User-Footer--> <!--X-User-Footer-End--> </BODY> </HTML>