Note: See the left column of the link above for the following:

• Routing Engine Specifications

• Understanding Internal Ethernet Interfaces

• Understanding Management Ethernet Interfaces

[M/T-Series]Routing Engine Network Operation Guide (NOG) Monitoring and Troubleshooting Guide

Command 'show chassis routing-engine' example output:

[SRX]show chassis routing-engine (View)
[MX/PTX/EX/QFX/ACX]show chassis routing-engine

KB9475 [juniper.net] - Mapping between FRU part numbers and model numbers

KB1529 [juniper.net] - What Routing Engine models have shipped with M, MX, and T-series routers?

Different Types of Storage Media in Routing-Engine:

Storage Media and Routing Engines (Junos OS) 
Storage media names table by Routing Engine 

KB11224 [juniper.net] - What do the different Junos file system device (Storage Media) names mean? 

KB10911 [juniper.net] - Understanding Junos software components and installation package names. 

KB11409 [juniper.net] - Upgrading/Downgrading/Reinstalling Junos 

KB8911 [juniper.net] - Procedure to Upgrade JUNOS on a Dual Routing Engine System 

KB9280 [juniper.net]   - Perform SMART tests from the CLI 

KB13103 [juniper.net] - Perform SMART tests from the shell 

KB11046 [juniper.net] - How to check the CompactFlash for errors? 

Recovering Root Password:

Recovering Root Password 

Routing Engine temperature thresholds [show chassis temperature-thresholds]

KB7968 [juniper.net] - [Junos] How to copy files from one location to another in a Routing Engine 

KB12729 [juniper.net] - How to synchronize configuration and settings on a newly installed backup Routing Engine 

KB11606 [juniper.net] - What happens when the Routing Engine's hard drive fails?

KB10751 [juniper.net] - Data to collect when in db> prompt to troubleshoot the Cause  

KB19024 [juniper.net] - Syslog message: Reboot reason(s): 0x2: watchdog  

KB8236 [juniper.net] - Syslog Message: smartd[2660]: Device /dev/ad1a, STANDBY source "disk-timer", in STANDBY 

KB35685 [juniper.net] - [SRX] Troubleshooting major RAID failure alarm in Standalone and Cluster Chassis environment 

KB20942 [juniper.net] - Things that could increase RE Memory Utilization, except routes 

Configuring Routing Engine Redundancy and on-disk failure actions:

Configuring Routing Engine Redundancy 

NSR ( Non-Stop Active Routing) 

Nonstop Active Routing Concepts

Note: See the right column of the above link for Configuring Nonstop Active Routing.

GRES (Graceful Routing-Engine Switchover)

Understanding Graceful Routing Engine Switchover

Note: See the right column for of above link for Configuring Graceful Routing Engine Switchover.

High Availability Configuration Guide:

Junos®OS : High Availability Feature Guide

KB11614 [juniper.net] - General guidelines for good logging and tracing policy