Tools Required - Cisco 7000 Series Hardware Installation And Maintenance Manual

Rapidly scans the backplane for configuration changes and does not reset any interfaces.
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Initializes all newly inserted interface processors, noting any removed interfaces and placing
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them in the administratively shutdown state.
Brings all previously configured interfaces on the interface processor back to the state they were
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in when they were removed. Any newly inserted interfaces are put in the administratively
shutdown state, as if they were present (but unconfigured) at boot time. If a similar interface
processor type has been reinserted into a slot, then its ports are configured and brought online up
to the port count of the original interface processor.
OIR functionality enables you to add, remove, or replace interface processors with the system
online, which provides a method that is seamless to end users on the network, maintains all routing
information, and ensures session preservation.
When you insert a new interface processor, the system runs a diagnostic test on the new interfaces
and compares them to the existing configuration.
If this initial diagnostic test fails, the system remains off line for another 15 seconds while it
performs a second set of diagnostic tests to determine whether or not the interface processor is faulty
and if normal system operation is possible.
If the second diagnostic test passes, which indicates that the system is operating normally and the
new interface processor is faulty, the system resumes normal operation but leaves the new interfaces
disabled. If the second diagnostic test fails, the system crashes, which usually indicates that the new
interface processor has created a problem on the bus and should be removed.
The system brings online only interfaces that match the current configuration and were previously
configured as up; all other interfaces require that you configure them with the configure command.
On interface processors with multiple interfaces, only the interfaces that have already been
configured are brought online.
For example, if you replace a single-PCA CIP with a dual-PCA CIP, only the previously configured
interface is brought online automatically; the new interface remains in the administratively shutdown
state until you configure it and bring it online.
Caution
messages by allowing at least 15 seconds for the system to reinitialize before removing or inserting
another interface processor.

Tools Required

You will need a number 1 Phillips or 3/16-inch flat-blade screwdriver to remove any blank interface
processor carriers (fillers) and to tighten the captive installation screws that secure the interface
processor in its slot. (Most interface processor carriers use slotted screws, but some were
manufactured with Phillips screws.) Whenever you handle interface processors, use a wrist strap or
other grounding device to prevent ESD damage. (See the section "Preventing Electrostatic Discharge
Damage" in the chapter "Preparing for Installation.")
When removing or replacing interface processors, you can avoid erroneous failure
Installing and Configuring Processor Modules
Maintenance 5-3