4.
Grasp the DIMM module by the edges, being careful not to touch any electrical
components.
5.
Press firmly on both ends, and push the module into the slot until the ejectors return
completely to the closed position.
6.
Install the Routing Engine. See
“Replacing a T4000 Routing Engine” on page 267
.
7.
You can view the SDRAM configuration and verify that the DIMM was installed correctly
by issuing the
show chassis routing-engine
command.
Related
Documentation
T4000 Routing Engine Description on page 39
•
•
T4000 RE-C1800 Routing Engine Description on page 40
•
T4000 RE-C1800 LEDs on page 41
•
T4000 Craft Interface LEDs on page 25
•
Preventing T4000 Electrostatic Discharge Damage on page 296
Replacing a T4000 SCG
1.
Removing a T4000 SCG on page 277
2.
Installing a T4000 SCG on page 278
Removing a T4000 SCG
The router can have one or two SCGs installed. The SCGs are located in the upper rear
of the chassis, above the control boards and Routing Engines. Each SCG weighs
approximately 1.9 lb (0.9 kg).
A nonredundant SCG is hot-pluggable. For redundant SCGs, the master SCG is
hot-pluggable. The backup SCG is hot-removable and hot-insertable if the master SCG
is functioning. Removing the backup SCG does not affect the functioning of the router.
Taking the master SCG offline might result in a brief loss of SONET clock lock while the
backup SCG becomes the master.
To remove an SCG (see
Figure 132 on page 278
):
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.
3.
Press the online/offline button on the SCG faceplate, and hold it down until the LED
goes out (about 5 seconds).
4.
Loosen the captive screws on the edges of the SCG faceplate.
5.
Grasp the SCG by the handle on the faceplate, and slide it out of the chassis.
6.
Place the SCG on the antistatic mat.
277
Copyright © 2013, Juniper Networks, Inc.
Chapter 19: Replacing T4000 Router Hardware Components
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