Figure 295: M40E And M160 Router Redundant Routing Engines - Juniper M Series Monitoring And Troubleshooting Manual

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Figure 295: M40e and M160 Router Redundant Routing Engines

M160 router rear

Routing engines

Documentation

M320 Router Routing Engine Redundancy

Engine and a Miscellaneous Control Subsystem (MCS). You can install two host modules

in the M40e and M160 routers. For more information about monitoring redundant MCSs,

"Checklist for Monitoring Redundant MCSs" on page

Both the Routing Engine and the MCS must be installed for the host module to function.

When two host modules are installed in the router, both are powered on, but only one is

the master; the second host module is the backup and performs no functions. By default,

the master host module has components installed in slots

host module has components installed in slots

The M40e and M160 router craft interface LEDs indicate the Routing Engine operating

status and mastership. (See

Routing engines

Checklist for Monitoring Redundant Routing Engines on page 591

The M320 router has a redundant Routing Engine that is a component of the host

subsystem (see

Figure 296 on page

and a Control Board. Two host subsystems can be installed in the M320 router. For more

information about monitoring redundant Control Boards, see .

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 module has components installed in slots

Chapter 29: Monitoring Redundant Routing Engines

"Check the M40e and M160 Router Routing Engine LEDs"

M40e router rear

596). The host subsystem consists of a Routing Engine

; the backup