Hardware Installation Guide for the Cisco 4451-X Integrated Services Router
Appendix: Online Insertion Removal and Hot-Swapping
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Table of Contents

Online Insertion and Removal (OIR) and Hot-Swapping

OIR Procedures

Removing a Module

Inserting a Data or Voice Module

Hot-Swapping Procedures

Online Insertion and Removal (OIR) 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.

The difference between hot-swapping and OIR is that OIR requires performing Cisco 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 ISR 4451-Xs:

  • Service Modules (SMs)
  • Network Interface Modules (NIMs)
  • SFPs
  • USB devices

The following items can be hot swapped:

  • Fan tray
  • Power supply—only when the router is backed up with the optional PSU

OIR Procedures

The following procedures describe using the OIR process to remove and replace data and voice modules.

Removing a Module

From a console terminal issue the hw-module subslot <subslot> stop command. The service module adapter LED blinks, then turns off, and the console displays a prompt signaling the module can be removed.

See the following output:

Router# hw-module subslot 2/0 stop
Proceed with stop of module? [confirm]
damo-O2#
*Mar 22 20:43:31.088: %SPA_OIR-6-OFFLINECARD: SPA (SM-X-1T3/E3) offline in subslot 2/0
*Mar 22 20:43:31.088: %IOSXE_OIR-6-SOFT_STOPSPA: SPA(SM-X-1T3/E3) stopped in subslot 2/0, interfaces disabled
Router#sh hw-m
Router#sh hw-module su
Router#sh hw-module subslot 2/0 oir
Module Model Operational Status
------------- -------------------- ------------------------
subslot 2/0 SM-X-1T3/E3 stopped

Inserting a Data or Voice Module

This step is only required if the oir-stop command was issued and the module was not physically removed from the slot. If the module was physically removed, this command is not needed.

From a console terminal issue the hw-module sm {slot} oir-start command. The console displays a output showing the module changing states. See the following output:

Router# hw-module sm 2 oir-start
Router#
*Nov 11 21:06:17.546: %ATMOC3POM-6-SFP_IN: Interface ATM2/0 OC3 MM SFP has been inserted.
Router#
*Nov 11 21:06:19.442: %LINK-3-UPDOWN: Interface ATM2/0, changed state to up
*Nov 11 21:06:20.442: %LINEPROTO-5-UPDOWN: Line protocol on Interface ATM2/0, changed state to up

Hot-Swapping Procedures

The following items can be hot-swapped:

  • Fan trays
  • Power supplies only when the router is backed up with an RPS

See the “Replacing a Fan Tray” section and the “Replacing Power Supplies and Redundant Power Supplies” section.