Cisco WS-C2950-24 Installation Manual page 217

Online Insertion Removal and Hot-Swapping
Online insertion and removal (OIR) enables you to replace faulty modules without affecting system
operation, which is similar to hot-swapping. OIR commands are issued before removing a module and
after installing a module. When performing OIR, an identical module must be used to replace the original
one. If performing OIR on multiple modules within a router, perform the operation on one module at a
time.
Requirement
The module must be in energywise full-power mode for OIR commands to be issued. If the module is in
energywise power-saving or shutdown mode, OIR commands can not be issued, and the module should
not be removed.
Note OIR is only supported on the Cisco 3925, 3925E, 3945, and 3945E ISRs.
The difference between hot-swapping and OIR is that OIR requires performing IOS commands before
and after the OIR. Hot-swapping is strictly a hardware function and requires no commands. Not all router
components or modules use OIR, or can be hot swapped.
The following items use OIR in the Cisco 3925, 3925E, 3945, and 3945E ISRs:
Service Modules
•
Network modules
•
Note
External CompactFlash memory
•
SFPs
•
• USB devices
The following items can be hot swapped:
• Fan tray
Power supply only when the router is backed up with an RPS
•
OL-18712-02
Network modules must be inserted into a network module adapter. The network module adapter
and network module must always remain together. They function as one unit.
A P P E N D I X
Cisco 2900 Series and 3900 Series Hardware Installation Guide
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