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3-2
Integrated Services Adapter and Integrated Services Module Installation and Configuration
OL-3575-01 B0
Chapter 3 Removing and Installing the ISA and the ISM
Online Insertion and Removal
Figure 3-1 Handling the ISM
Figure 3-2 Handling the ISA
Online Insertion and Removal
Several platforms support online insertion and removal (OIR); therefore, you do not have to power down
the router when removing and replacing an ISA on Cisco 7200 series routers.
Warning
Cisco 7100 series routers do not support OIR for the service module slot (slot 5); therefore, you must
power down the router when removing or replacing an ISM in Cisco 7100 series routers.
It is wise to gracefully shut down the system before removing a port adapter that has active traffic moving
through it. Removing a module while traffic is flowing through the ports can cause system disruption.
Once the module is inserted, the ports can be brought back up.
Note As you disengage the module from the router or switch, online insertion and removal (OIR)
administratively shuts down all active interfaces in the module.
OIR allows you to install and replace modules while the router is operating; you do not need to notify
the software or shut down the system power, although you should not run traffic through the module you
are removing while it is being removed. OIR is a method that is seamless to end users on the network,
maintains all routing information, and preserves sessions.
The following is a functional description of OIR for background information only; for specific
procedures for installing and replacing a module in a supported platform, refer to the “ISA or ISM
Removal and Installation” section on page 3-4.
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