Chapter 6 Maintaining the Router
Powering Down the Router
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Cisco 12006 and Cisco 12406 Router Installation and Configuration Guide
OL-11497-03
• Removing and Installing a Clock and Scheduler Card, Switch Fabric Card, or
Alarm Card, page 6-56
• Removing and Installing the Chassis, page 6-68
• Upgrading the RP and Line Card Memory, page 6-77
Before performing the procedures in this chapter, review the safety information in
the “Laser Safety” section on page 2-5 and the “Lifting Guidelines” section on
page 2-5, and see the Regulatory Compliance and Safety Information for the
Cisco 12000 Series Router (Document Number 78-4347-xx), which comes with
your router.
Powering Down the Router
Unless otherwise noted, the maintenance tasks described in this chapter can be
performed while the router remains powered on. Most Cisco 12006 and
Cisco 12406 routers field replaceable units (FRUs) support online insertion and
removal (OIR), which means they can be removed and installed (hot-swapped)
while the router remains powered up.
• Line cards, switch fabric cards (SFCs), alarm cards, and the blower module
are hot-swappable.
• Power modules, clock and scheduler cards (CSCs), and RPs also support OIR,
but are hot-swappable only when the system is equipped with two power
modules, two CSCs, or two RPs, respectively.
• The power distribution unit (PDU) does not support OIR.
To power down an AC- or a DC-powered router, follow these steps:
Step 1 Turn off the faceplate switches on the power modules.
Step 2 Turn off the facility circuit breakers for power source lines connected to the PDU.
Step 3 When the procedure requires that the router be disconnected from source power:
a. AC-powered systems—Unplug both AC power cords from the power outlets.
b. DC-powered systems—Disconnect and remove the source DC wires from
both power connector blocks on the PDU.