[alcatel-nsp] Low voltage condition causes CPM2 and IOM2 to fail

Nadavallil, Cyril (Cyril) cyril.nadavallil at alcatel-lucent.com
Wed Jun 26 20:16:06 EDT 2013

Hi Andy,

I'll get someone to follow-up with you in the morning to review some cf3: output so we can figure out what's going on.


----- Original Message -----
From: Koch, Andrew [mailto:andrew.koch at tdstelecom.com]
Sent: Wednesday, June 26, 2013 05:10 PM
To: 'alcatel-nsp at puck.nether.net' <alcatel-nsp at puck.nether.net>
Subject: [alcatel-nsp] Low voltage condition causes CPM2 and IOM2 to fail

We have run into a couple instances where on a -48v DC system, we have had the office voltage drop below 42v.  When this occurs, the CPM2 and IOM2 on our 7750 routers fail to restore when appropriate power levels are restored.  In both instances, multiple components (both CPMs, or multiple IOMs) have simultaneously failed to boot on the chassis. These failed components do not POST.  It appears some type of memory corruption or zeroing occurs.

Has anyone else seen these troubles?

Thanks for any thoughts.

Andy Koch
TDS Telecom - IP Network Operations
andrew.koch at tdstelecom.com

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