Removing and Inserting SDRAM Modules
The SDRAM installed on the Routing Engine provides storage for the routing and
forwarding tables and for other Routing Engine processes. The design of the Routing
Engine allows you to modify the SDRAM configuration by adding DIMM memory modules
to or removing modules from the Routing Engine board. The Routing Engine contains
from one to three 168-pin DIMMs.
To modify the SDRAM configuration, use the following procedures:
•
Removing a SDRAM Module on page 103
•
Inserting a SDRAM Module on page 103
Removing a SDRAM Module
The SDRAM modules are located on the top of the Routing Engine. To remove a SDRAM
module:
1.
Place an electrostatic bag or antistatic mat on a flat, stable surface.
2.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect
the strap to one of the ESD points on the chassis. Verify that the router is attached to
a proper earth ground.
3.
Remove the Routing Engine as described in “Removing an M7i Routing Engine” on
page 98.
4.
To release the SDRAM module, press the plastic ejectors on both sides of the module.
5.
Grasp the SDRAM module, being careful not to touch any electrical components on
the module, and firmly pull it out of the slot on the Routing Engine.
6.
Place the SDRAM module on the antistatic mat or in the electrostatic bag.
7.
Push the plastic ejectors to close the empty SDRAM module slot.
Inserting a SDRAM Module
To insert a SDRAM module onto the Routing Engine (see Figure 46 on page 104):
1.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist and connect
the strap to one of the ESD points on the chassis. Verify that the router is attached to
a proper earth ground.
2.
Remove the SDRAM module from its electrostatic bag.
3.
To open the empty SDRAM slot, press the plastic ejectors on both sides.
4.
Grasp the SDRAM module by the edges, being careful not to touch any electrical
components.
5.
Pressing firmly on both ends, push the module into the slot until the ejectors return
completely to the closed position.
6.
Install the Routing Engine as described in “Installing the Routing Engine in a M7i Router”
on page 98.
103
Copyright © 2010, Juniper Networks, Inc.
Chapter 15: Replacing M7i Hardware Components
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