Code Download; Environmental Monitoring And Alarms - Cisco 12006 series Product Overview

Maintenance Bus

Code Download

Diagnostics

Environmental Monitoring and Alarms

Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
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A portion of the line card operating software can be downloaded from the RP to
the line card over the MBus. Because the MBus is relatively slow compared to the
switch fabric, only enough code is downloaded to the line card for it to access the
switch fabric and complete the download process.
The diagnostic software image is downloaded from the RP to the line card during
the test sequence.
The MBus module on each component monitors the environment of that
component as follows:
Line cards and the RP are monitored for temperature by two temperature
•
sensors mounted on each card. The MBus module makes voltage adjustments
through software for the +2.5 VDC, +3.3 VDC, and +5 VDC DC-DC
converters.
Clock and scheduler cards and switch fabric cards are monitored for
•
temperature by two temperature sensors mounted on each card. The MBus
module makes voltage adjustments through software for the +2.5 VDC and
+3.3 VDC converters.
The MBus module on the alarm card makes voltage adjustments for +5 VDC.
•
Environmental monitoring includes voltage monitoring, temperature
•
monitoring, and sensing for the blower module fans.
Chapter 1 Product Overview
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