Cisco 3825 Hardware Installation Guide - Page 265

Chapter 22 Connecting Cisco Intrusion Detection System Network Modules Online Insertion and Removal with a CIDS Network Module Figure 22-3 CIDS Network Module LEDs LINK ACT NM-CIDS-K9 DISK Command & Control LINK ACT PWR EN CF FastEthernet 0 PWR EN CF 95060 Table 22-1 CIDS Network Module LEDs LED ACT CF DISK EN LINK PWR Meaning There is activity on the Fast Ethernet connection. The CompactFlash module is active. Note Since CompactFlash is not supported on the NM-CIDS-K9, this LED is not active except during self-test. There is activity on the 20-GB disk expansion module hard drive. 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 CIDS 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. Caution Unlike other network modules, CIDS 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 CIDS 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 two-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. OL-2485-20 Cisco Network Modules Hardware Installation Guide 22-3