Cisco XR 12404 - Manual (Page 127)

5-3
Cisco XR 12404 Router Installation Guide
OL-13830-02
Chapter 5 Maintaining the Router
Powering Off the Router
Powering Off the Router
Unless otherwise noted, the maintenance tasks described in this chapter can be
performed while the router remains powered on. Most Cisco XR 12404 Router
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 on.
• Line cards and the fan tray assembly are hot-swappable.
• PEMs and RPs also support OIR, but are hot-swappable only when the system
is equipped with two PEMs or two RPs, respectively.
• The power distribution unit (PDU) and CSF card do not support OIR.
Use the following procedure to power off an AC- or a DC-powered router.
Step 1 Turn off the power switches (AC) or circuit breaker switches (DC) on the PEMs.
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:
• AC-powered systems—Unplug the AC power cords from the power outlets.
• DC-powered systems—Disconnect and remove the source DC wires from the
power connector blocks on the PDU.
Step 4 Verify the following conditions:
• LEDs on the PEMs are off.
• LEDs on the RP, all line cards, and CSF are off.
• The fans in the fan module tray are off.
todd.book Page 3 Monday, March 16, 2009 2:47 PM