Cisco 3825 Hardware Installation Guide - Page 249

Chapter 19 Connecting Content Engine Network Modules for Caching and Content Delivery Online Insertion and Removal with a CE Network Module Table 19-1 Content Engine Network Modules for Caching and Content Delivery LEDs (continued) LED DISK EN LINK PWR Meaning There is activity on the 40- or 80-GB disk expansion module hard drive. Note The faceplate for the CE network module with SCSI controller expansion module also displays the disk LED, but the LED is not active. The module has passed self-test and is available to the router. The Fast Ethernet connection is available to the network module. Power is available to the network module. Online Insertion and Removal with a CE Network Module Some Cisco modular access routers allow you to replace network modules without switching off the router or affecting the operation of other interfaces. This feature is called online insertion and removal (OIR). OIR of network modules provides uninterrupted operation to network users, maintains routing information, and ensures session preservation. To find out if the router you are working on allows OIR, see the router model's hardware installation guide. Caution Unlike other network modules, CE network modules use hard disks. Online removal of disks without proper shutdown can result in file system corruption and might render the disk unusable. The operating system on the CE network module must be shut down in an orderly fashion before the network module is removed. Caution Cisco routers support OIR with similar modules only. If you remove a network module, install another module exactly like it in its place. If you remove a 2-slot network module (along with any installed WAN or voice interface cards), install another module and card combination exactly like it. For a description of informational and error messages that may appear on the console during this procedure, see the hardware installation guide for your type of router. To perform online removal of a CE network module and insertion of a replacement, follow these steps with the router in privileged EXEC mode: Step 1 Initiate a CE network module console access session using the following command: Router# service-module content-engine slot/unit session Trying 10.10.10.1, 2129 ... Open CE-netmodule con now available Press RETURN to get started! CE-netmodule> enable CE-netmodule# OL-2485-20 Cisco Network Modules Hardware Installation Guide 19-5