Cisco 4321 ISR User Manual

6-25
Hardware Installation Guide for Cisco 4000 Series Integrated Services Routers
OL-32185-02
Chapter 6 Install and Upgrade Internal Modules and FRUs
Install and Remove DDR DIMMs on Cisco 4400 or 4300 Series ISRs
DIMMs have a polarization notch on the mating edge to prevent incorrect insertion. Figure 6-19 shows
the polarization notch on a DIMM.
Figure 6-19 DIMM Showing Polarization Notch
Remove DIMM
To remove a DIMM:
Step 1 Read the “Safety Warnings” section on page 6-2 section and disconnect the power supply before you
replace any module.
Step 2 Remove the chassis cover. See the “Remove and Replace the Chassis Cover” section on page 6-4.
Step 3 Locate the DIMM module. See the “Locate Internal and External Slots for Modules on Cisco 4451 ISR”
section on page 6-7 to find the DIMM sockets on the router.
1 Polarization notch
250944
1

Cisco 4321 ISR Specifications

General

Form Factor	Rack-mountable
Flash Memory	4 GB
Operating Temperature	0°C to 40°C
Data Link Protocol	Ethernet, Fast Ethernet, Gigabit Ethernet
Console Port	RJ-45
Auxiliary Port	1x RJ-45
Memory	4 GB
Expansion Slots	1x SM
Storage Temperature	-20°C to 65°C
Humidity	10 - 85% (non-condensing)
Features	VPN support, Firewall, QoS
Remote Management Protocol	SNMP, CLI
Network/Transport Protocol	IPv6
Maximum Throughput	50 Mbps