Juniper M Series User Manual

Figure 222: SCG Component
Two SCGs are installed in the T320, T640, and the T1600 routers. The SCGs install into
the upper rear of the chassis in the slots labeled SCG0 and SCG1.
If both SCGs are installed and functioning normally, SCG0 is master and SCG1 is backup.
Removing the backup SCG does not affect the functioning of the router or router. Taking
the master SCG offline might result in a brief loss of SONET clock lock while the backup
SCG becomes master.
The SCGs are hot-pluggable.
Figure 223 on page 403 shows the location of the SCGs on the T320, T640, and T1600
router.
Figure 223: T320, T640, and T1600 Router SCG Location
g003268
T320
T640
T1600
SCG1
SCGs
SCG0
SCGs
SCG0
SCG1
SCGs
SCG0
SCG1
403Copyright © 2012, Juniper Networks, Inc.
Chapter 15: Monitoring the SCGs

Juniper M Series Specifications

General

Brand	Juniper
Model	M Series
Category	Network Router
Language	English