Appendix; Online Insertion And Removal And Hot-Swapping - Cisco 4000 Series Hardware Installation Manual

Online Insertion and Removal and Hot-Swapping

The online insertion and removal (OIR) operation lets you replace faulty data and voice modules without
affecting system operations. The OIR is similar to hot-swapping. OIR commands are issued before
removing and after installing a module. When performing OIR, use an identical module to replace an
original one. If you need to perform the OIR operation on multiple modules within a router, perform the
operation one module at a time.
The difference between hot-swapping and OIR is that OIR requires executing Cisco IOS commands
before and after the OIR. Hot-swapping is strictly a hardware function and does not require the execution
commands. Not all router components or modules use OIR, or can be hot swapped.
The following components use OIR in the routers:
Service Modules (SMs)
•
• Network Interface Modules (NIMs)
• SFPs
• USB devices
The following components can be hot swapped:
Fan tray
•
Power supply: only when the router is backed up with an optional PSU
•
Requirement
To issue OIR commands, you must keep the module that is to be replaced in EnergyWise full-power
mode. If the module is in EnergyWise power-saving or shutdown mode, you cannot issue OIR
commands, and you cannot, therefore, remove the module.
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Hardware Installation Guide for Cisco 4000 Series Integrated Services Routers
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