There is a known issue with the 7500 router and that exact indicator - below
are excerpts from CCO with couple tests you can do (most effective if you
have a spare power supply). But the chassis has been known to report false
errors, this is not affected by the IOS version on the router.

CCO link:
http://www.cisco.com/en/US/partner/products/hw/routers/ps359/products_tech_note09186a008009494e.shtml#errors

Valuable time and resources are often wasted replacing hardware that
actually functions properly. This document helps troubleshoot common
hardware issues with the Cisco 7500 series router chassis.

If the router has two power supplies, and the combined bus voltages are low,
it cannot be a power supply problem. This is because one power supply
cannot  drag down the output voltage of another due to the presence of
isolation diodes. Suspect the Chassis Interface (CI) in this case, as well.

If you have a spare power supply available, you can replace the one in the
router to see if the problem goes away. If, after replacing the power
supply, the errors are still seen, replace the Chassis Interface (CI).

Bill Creighton CCNP
Network Design Engineer, eVPN
NSPM AT&T Business Service Delivery

> -----Original Message-----
> From: Marek [mailto:[EMAIL PROTECTED]
> Sent: Monday, July 28, 2003 9:43 AM
> To: [EMAIL PROTECTED]
> Subject: Message: CI-2-ENVCRIT: +12 Voltage measured at ... [7:73105]
> 
> 
> Hello,
> 
> 
> I get on C7500 (IOS 12.2(2)T4)
> this messages in the logs every 5min:
> 
> %CI-2-ENVCRIT: +12 Voltage measured at 9.27
> 
> it started several weeks ago with last number just
> below default warning threshold (11.61). Now it is below 
> critical threshold
> (10.90).
> I checked both power supplies, upgraded the IOS to 12.2(17), 
> tried resetting
> (by unplugging it and plugging again) chassis interface. 
> Error is still there
> and voltage is falling down.
> Is this chassis interface (CI) failure or could it be something else?
> 
> Regards,
> Marek Kokoszczynski CCNP, CCDA
> Routing Engineer
> Futuro AS15833




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