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Routing Engine operation and troubleshooting

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Article ID: KB11615 KB Last Updated: 22 May 2020Version: 22.0
Summary:

This article provides an overview of the best practices and tips for operating, monitoring, and troubleshooting Routing Engines.

 

Solution:

Click a topic link to view configuration or troubleshooting information related to the RE (Routing Engine):

Administration - Operations / Maintenance / Monitoring

General Supported Routing Engines by Chassis

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

  • Routing Engine Specifications

  • Understanding Internal Ethernet Interfaces

  • Understanding Management Ethernet Interfaces

Routing Engine Network Operation Guide (NOG)

Command 'show chassis routing-engine' example output:

show chassis routing-engine (View)

KB9475 - Mapping between FRU part numbers and model numbers

KB1529 - What Routing Engine models have shipped with M, MX, and T-series routers?

Storage Media

Different Types of Storage Media in Routing-Engine:

Storage Media and Routing Engines

KB11224 - What do the different Junos file system device (Storage Media) names mean?

Software Maintenance

KB10911 - Understanding Junos software components and installation package names

KB11409 - Upgrading/Downgrading/Reinstalling Junos

KB8911 - Procedure to Upgrade JUNOS on a Dual Routing Engine System

Hard Disk Operations

KB9280   - Perform SMART tests from the CLI

KB13103 - Perform SMART tests from the shell

KB11136 - [M/MX/T-series] How to use the 'iostat' shell command to monitor hard disk activity on a Routing Engine

KB12728 - How to locate files on the hard disk drive that have recently been modified

Compact Flash Operations

KB8201 - How to partition newly installed CF on an RE?

KB11413 - How to upgrade a Routing Engine Compact Flash without losing the configuration?

KB11046 - How to check the CompactFlash for errors?

Miscellaneous

Recovering Root Password:

Recovering Root Password

KB1971 - Routing Engine temperature thresholds

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

KB12729 - How to synchronize configuration and settings on a newly installed backup Routing Engine

KB11408 - How to simulate an RE failure in order to test GRES

 

Troubleshooting

Hard drive

KB11606 - What happens when the Routing Engine's hard drive fails?

KB10751 - Data to collect when in db> prompt to troubleshoot the Cause

KB19024 - Syslog message: Reboot reason(s): 0x2: watchdog

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

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

Compact Flash Issues

KB11324 - ad0: Device does not support APM

Memory Issues

KB1796 - How is memory utilization in the 'show chassis routing-engine' command output calculated?

KB20942 - Things which could increase RE Memory Utilization, except routes

 

Prevention

Minimizing Failure Impact

Configuring Routing Engine Redundancy and on-disk failure actions:

Configuring Routing Engine Redundancy

NSR ( Non-Stop Active Routing) 

Nonstop Active Routing Concepts

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

GRES (Graceful Routing-Engine Switchover)

Understanding Graceful Routing Engine Switchover

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

High Availability Configuration Guide:

Junos®OS : High Availability Feature Guide

Preventing Failures

KB11607 - Periodic Adaptive Standby for RE hard drive

KB11614 - General guidelines for a good logging and tracing policy

 

Modification History:

2020-05-21: Article checked for accuracy and validity; links updated; no other changes made

 

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