Normal Router Startup Sequence - Cisco 12416 Installation And Configuration Manual
Cisco systems bridge/router installation and configuration guide
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Also See for Cisco 12416:
- Replacement instructions manual (32 pages) ,
- Unpacking instructions manual (28 pages) ,
- Instructions manual (16 pages)
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Chapter 5
Troubleshooting the Installation
Normal Router Startup Sequence
OL-11495-01
Chassis backplane power distribution. –48 VDC power from the power
•
supplies is transferred to the chassis backplane. The –48 VDC is distributed
to all of the cards through the backplane connectors. The blower module
receives power from the chassis backplane through a wiring harness and
passes MBus data back to the chassis backplane.
Processor subsystem—Includes redundant RPs, line cards, switch fabrics,
•
and two alarm cards. The RP and line cards are equipped with onboard
processors. The RP downloads a copy of the Cisco IOS image to each line
card processor. The system uses an alphanumeric display (on each line card
and RP) to display status and error messages, which can help in
troubleshooting.
Cooling subsystem—Consists of 2 blower modules, which circulate air
•
through the card cages to cool the cards, and fan in each of the power
modules, which circulates cooling air through the power module.
You can generally determine when and where the router failed during the startup
sequence by checking the status LEDs on the power modules, and the
alphanumeric displays on the RP and line cards.
In a normal router startup sequence, the following sequence of events and
conditions occur:
The fans in the blower module receive power and begin drawing air through
1.
the chassis.
The blower module OK indicator is on.
The fan in each PEM receives power and begins drawing air through the
2.
power supply.
The power supply Pwr OK indicator is on.
As the power on and boot process progresses for the RP and each installed
3.
line card, the status of each card appears on the alphanumeric display on the
front panel of the card:
The upper row of the display is powered by the DC-to-DC converter on
–
the card.
–
The lower row of the display is powered by the +5 VDC provided through
the backplane.
Cisco 12016, Cisco 12416, and Cisco 12816 Router Installation and Configuration Guide
Troubleshooting Overview
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Table of Contents
Troubleshooting
