Removing And Replacing An Ac-Input Or Dc-Input Power Supply; Removing A Power Supply From A Cisco 7200 Series Router - Cisco NPE-175 Installation And Configuration Manual

Removing and Replacing an AC-Input or DC-Input Power Supply

WFQ Queues
When there is an increase in ignored packets and in the no buffer count, it is possible that the output
weighted fair queueing (WFQ) queues are too long. To specify the number of dynamic queues to be
reserved for use by the class-default class as part of the default class policy, use the fair-queue
policy-map class configuration command; for example:
policy-map policy9
class class-default
fair-queue 16
queue-limit 20
Removing and Replacing an AC-Input or DC-Input Power Supply
The weight of power supplies installed in a Cisco 7200 series router or Cisco 7200 VXR router might
make it difficult for you to pull the network processing engine from its chassis slot. If this is the case,
first remove the installed power supplies from the chassis, and then remove the network processing
engine. The following sections explain how to remove and replace an AC-input or a DC-input power
supply in a Cisco 7200 series router.
The network processing engine is installed above the power supplies in a Cisco uBR7200 series router.
Note
You do not need to remove the power supplies from a Cisco uBR7200 series router to pull the network
processing engine from its chassis slot.
Do not mix AC-input and DC-input power supplies in the same router.
Caution

Removing a Power Supply from a Cisco 7200 Series Router

The steps for removing an AC-input and DC-input power supply from a Cisco 7200 series router are the
same. The two power supplies share the same dimensions and faceplates, except for the AC-input
receptacle on the AC-input power supply and the DC-input lead receptacles on the DC-input power
supply.
To remove an AC-input or DC-input power supply from a Cisco 7200 series router, complete the
following steps:
Ensure that the power switch on the power supply is in the off (O) position and input power is
Step 1
disconnected from the power supply and its power source. (See the
or NSE" section on page
Note When powering off the router, wait a minimum of 30 seconds before powering it on again.
Step 2 Using a number 2 Phillips or a 3/16-inch flat-blade screwdriver, loosen the two captive installation
screws on the faceplate of the power supply. (See
If the router is not installed in a standard 19-inch, 4-post rack or in a telco-type rack, skip to Step 6. If
the router is installed in a rack, determine if any permanent rack fixtures, such as a power strip, are
obstructing access to the power supply. If a rack fixture is obstructing access to the power supply,
proceed to
Network Processing Engine and Network Services Engine Installation and Configuration
10-14
9-2.)
Step 3.
Chapter 10 Configuration Tasks and Troubleshooting Information
"Removing and Replacing the NPE
Figure 10-1.)
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