Figure 298: Tx Matrix Router And Tx Matrix Plus Router Routing Engines; Redundant Routing Engine Automatic Failover Overview - Juniper M Series Monitoring And Troubleshooting Manual

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M Series and T Series Routers Monitoring and Troubleshooting Guide

TX Matrix Router and TX Matrix Plus Router Routing Engine Redundancy

Documentation

Figure 298 on page 598

shows the TX Matrix router and TX Matrix Plus router redundant

Routing Engines that are components of the host subsystem.

Figure 298: TX Matrix Router and TX Matrix Plus Router Routing Engines

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

; the backup host module has components installed in slots

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 routing engine LEDs indicate the Routing Engine operating status and mastership.

Check the TX Matrix Router Routing Engine LEDs on page 189

Check the TX Matrix Plus Router Routing Engine LEDs on page 190

If the keepalive time is configured for 2 seconds, the sequence of events is as follows:

TX Matrix Plus