Replacing A T320 Scg; Removing A T320 Scg - Juniper Core Router T Series Hardware Manual

T320 Core Router Hardware Guide

Replacing a T320 SCG

Removing a T320 SCG

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The SCGs are hot-pluggable. If two SCGs are installed and both are functioning normally,
is the master and
SCG0 SCG1
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.
You can determine which SCG is functioning as the master in one of two ways:
Check the blue
MASTER
is functioning as the master.
To display which SCG is functioning as the master:
user@host> show chassis clocks
To replace an SCG, perform the following procedures:
Removing a T320 SCG on page 186
1.
Installing a T320 SCG on page 187
2.
The router can have one or two SCGs installed. The SCGs are located in the rear of the
chassis, above the SIBs. Each SCG weighs approximately 1.9 lb (0.9 kg).
To remove an SCG (see Figure 69 on page
Place an electrostatic bag or antistatic mat on a flat, stable surface.
1.
Attach an electrostatic discharge (ESD) grounding strap to your bare wrist, and connect
2.
the strap to one of the ESD points on the chassis. .
Press the online/offline button on the SCG faceplate and hold it down until the
3.
LED goes out (about 5 seconds).
Loosen the captive screws on the edges of the SCG faceplate.
4.
Grasp the SCG by the handle on the faceplate and slide it out of the chassis.
5.
Place the SCG on the antistatic mat.
6.
is the backup. Removing the backup SCG does not affect
LED on the SCG faceplate. If this LED is on steadily, the SCG
187):
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