Figure 297: T320, T640, and T1600 Router Routing Engines
g002285
Routing
Engines
Routing
Engines
T640 router rear
T1600 router rear
T320 router rear
RE0
RE1
RE0
RE1
RE0
RE1
Both the Routing Engine and the Control Board must be installed for the host subsystem
to function. When two host subsystems are installed in the router, both are powered on,
but only one is the master; the second host subsystem is the backup and performs no
functions. By default, the master host subsystem has components installed in slots RE0
and CB0; the backup host module has components installed in slots RE1 and CB1. If one
Routing Engine physically fails, the other one assumes the routing functions. If a software
failure occurs, the other backup Routing Engine assumes routing functions if some
preliminary configuration has been done.
The T320 router, T640 router, and T1600 router craft interface LEDs indicate the Routing
Engine operating status and mastership.
Related
Documentation
Check the T320 Router Routing Engine LEDs on page 187•
• Check the T640 Router Routing Engine LEDs on page 187
597Copyright © 2012, Juniper Networks, Inc.
Chapter 29: Monitoring Redundant Routing Engines
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