Cisco 7304 Installation Guide download pdf (Page 64)

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Cisco 7304 Router Modular Services Card and Shared Port Adapter Hardware Installation Guide

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Chapter 5 Installing and Removing a Carrier Card

Online Insertion and Removal

Figure 5-1 Handling an MSC

Online Insertion and Removal

OIR allows you to install and replace MSCs 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 Cisco 7304 router supports OIR of the MSC. To do this, you can stop an MSC (which automatically

deactivates any installed SPAs) and remove the MSC with the SPAs still intact.

If you plan to remove an MSC, we recommend that you deactivate the MSC first using the hw-module

slot privileged EXEC command. When you deactivate an MSC using this command, it automatically

deactivates each of the SPAs that are installed in that MSC and allows for the completion of data traffic

before the active interfaces are shut down. Therefore, it is not necessary to deactivate each of the SPAs

prior to deactivating the MSC.

Although graceful deactivation of an MSC is preferred using the hw-module slot stop command, the

Cisco 7304 router does not support removal of the MSC without deactivating it first.

Note CLI-controlled OIR using the hw-module slot stop command is the recommended way of performing

OIR on this platform.

Note As you disengage the MSC from the router, online insertion and removal (OIR) administratively shuts

down all active interfaces on the MSC.

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Metal carrier

GND

Printed circuit board

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Cisco 7304 Installation Guide Page 64