Cisco 4451-X User Manual

CHAPTER
7-1
Hardware Installation Guide for the Cisco 4451-X Integrated Service Routers
OL-27644-01
7
Online Insertion and Removal (OIR) and
Hot-Swapping
Online insertion and removal (OIR) enables you to replace faulty modules without affecting system
operation, which is similar to hot-swapping. OIR commands are issued before removing a module and
after installing a module. When performing OIR, an identical module must be used to replace the original
one. If performing OIR on multiple modules within a router, perform the operation on one module at a
time.
Requirement
The module must be in energywise full-power mode for OIR commands to be issued. If the module is in
energywise power-saving or shutdown mode, OIR commands can not be issued, and the module should
not be removed.
The difference between hot-swapping and OIR is that OIR requires performing Cisco IOS commands
before and after the OIR. Hot-swapping is strictly a hardware function and requires no commands. Not
all router components or modules use OIR, or can be hot swapped.
The following items use OIR in the Cisco ISR 4451-Xs:
• Service Modules (SMs)
• Network Interface Modules (NIMs)
• External CompactFlash memory
• SFPs
• USB devices
The following items can be hot swapped:
• Fan tray
• Power supply—only when the router is backed up with the optional PSU

Cisco 4451-X Specifications

General

Aggregate Throughput	2 Gbps
Total Onboard WAN or LAN 10/100/1000 Ports	4
RJ-45-based Ports	4
SFP-based Ports	4
Enhanced Service Module (SM-X) Slots	2
NIM (Network Interface Module) Slots	3
Onboard ISC Slot	1
Memory (DRAM) Default	4 GB
Memory (DRAM) Maximum	16 GB
Flash Memory	8 GB
Rack Height	2 RU
Product Type	Router
Form Factor	Rack-mountable
Connectivity Technology	Wired
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Product Series	Cisco 4000 Series
Model	4451-X
Network/Transport Protocol	IPsec
Remote Management Protocol	SNMP
Features	Firewall protection, VPN support, Quality of Service (QoS), IPv6 support
Interfaces	4 x 10/100/1000 Ethernet ports, 4 x SFP ports
Power	AC 100-240 V (50/60 Hz)
Memory	4 GB
Operating Temperature	0 to 40 °C
Storage Temperature	-40 to 70 °C
Humidity	5% to 95% non-condensing