Cisco CISCO2650 - 2650 Router Hardware Installation Manual page 368

Online Insertion and Removal of Cisco NAC Network Modules
Establishing a Gigabit Ethernet Internal Logical Connection
Use the Cisco High-Speed Intrachassis Module Interconnect (HIMI) feature to establish a Gigabit
Ethernet (GE) internal logical connection between two NMEs, or between an onboard small-form-factor
pluggable (SFP) GE module and an NME on Cisco 3825 and Cisco 3845 routers.
Connections can be established only as follows:
•
•
•
Note A module interconnection between the GE port on an SFP module and an NME slot or an NME-to-NME
cross-connection is permitted at any given time, but both types of connections cannot exist at the same
time.
Note Connections between the onboard RJ-45 GE ports and NME slots are not supported.
For details about configuring HIMI connections, see the Cisco High-Speed Intrachassis Module
Interconnect (HIMI) Configuration Guide on Cisco.com,
http://www.cisco.com/en/US/products/ps5855/prod_configuration_guide09186a008068ea83.html
Online Insertion and Removal of Cisco NAC Network Modules
Some Cisco 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).
Module OIR provides uninterrupted operation to network users, maintains routing information, and
ensures session preservation.
Unlike other network modules, the Cisco NAC network module uses a hard disk. Online removal of
Caution
disks without proper shutdown can result in file system corruption and might render the disk
unusable. The operating system on the network module must be shut down in an orderly fashion
before the module is removed or powered down.
Caution Cisco routers support OIR with similar modules only. If you remove a module, install another module
exactly like it in its place. If you remove a 2-slot 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 router.
Cisco Network Modules Hardware Installation Guide
34-24
Between the GE port in an installed onboard SFP module on the Cisco 3825 and Cisco 3845 routers
Between GE interfaces in NME slots 1 and 2 on the Cisco 3825 router
Between GE interfaces in NME slots 2 and 4 on the Cisco 3845 router
Chapter 34 Connecting Cisco Network Admission Control Network Modules
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