Cisco Systems ISR4451XK9 Installing and Removing DDR DIMMs, Replacing the NIM-SSD on the Router

Chapter 6 Installing and Upgrading Internal Modules and FRUs

Installing and Removing DDR DIMMs

Replacing the NIM-SSD on the Router

To replace the NIM-SSD on the Cisco ISR 4451-X, follow these steps:

Step 1 Align the NIM-SSD carrier card to the router base.

Step 2 With two hands, slide it back into its slot in the Cisco ISR 4451-X.

Step 3 Tighten the captive screws as shown in Figure 6-13.

Installing and Removing DDR DIMMs

To access the DIMMs, you must remove the chassis cover as described in the “Accessing Internal Modules” section on page 6-4.

Caution Always wear an ESD-preventive wrist strap and ensure that it makes good contact with your skin when you remove or install DIMMs. Connect the equipment end of the wrist strap to the metal part of the chassis.

Caution Handle DIMMs by the edges only. DIMMs are ESD-sensitive components and can be damaged by mishandling.

Locating and Orienting DIMM

The Cisco ISR 4451-Xs have three DIMM sockets on the system board: two for the control plane CPU, and one for the data plane CPU. See the “Locating Internal and External Slots for Modules” section on page 6-5to find DIMM connectors on the router.

DIMMs have a polarization notch on the mating edge to prevent incorrect insertion. Figure 6-14shows the polarization notch on a DIMM.

Caution DIMMs and PVDM4s plug into similarly sized sockets. Only the polarization notch differs. Look for the polarization notch shown in Figure 6-14before inserting a DIMM in the socket.

	Hardware Installation Guide for the Cisco 4451-X Integrated Services Router
OL-27644-01		6-18