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Routing Engine operation and troubleshooting

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Article ID: KB11615 KB Last Updated: 15 Dec 2015Version: 21.0
Summary:

Overview of the best practices and tips on how to operate, monitor, and troubleshoot 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 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
KB9475 - Mapping between FRU part numbers and model numbers
KB1529 - RE models shipped with M/MX/T Routers
Storage Media Different types of storage media in the Routing Engine
KB11224 - Junos file system device names
Software Maintenance KB10911 - Junos software components & installation package names
KB11409 - Software Upgrade Procedure 
KB8911 - Upgrading the software on a dual RE system
Hard Disk Operations KB9280   - Perform SMART tests from the CLI
KB13103 - Perform SMART tests from the shell
KB11136 - Using iostat to understand the Hard Drive activity level
KB12728 - Using find to locate recently modified files on the Hard Drive
Compact Flash Operations KB8201 - Partitioning a newly installed Compact Flash
KB11413 - Upgrading RE Compact Flash without  losing the configuration
KB11046 - Checking the Compact Flash for errors
Miscellaneous Password Recovery Procedure
KB1971 - RE Temperature Threshold for each type of RE
KB7968 - Copy files from Master RE to Backup RE
KB12729 - Synchronizing files and configuration between master RE & newly replaced backup RE
KB11408 - Testing GRES feature by simulating a RE failure

Troubleshooting
Hard drive KB11606 - What happens when the hard drive fails
KB10751 - Data to collect when in db> prompt to troubleshoot cause
KB19024 - Syslog message: Reboot reason(s): 0x2: watchdog
KB8236   - Syslog message: Device /dev/ad1a, STANDBY source "disk-timer", in STANDBY
KB3036 - Message 'atareadhdidentity: ioctl: Resource temporarily unavailable'
Compact Flash Issues KB11324 - Message 'ad0: Device does not  support APM'
Memory Issues KB1796 - How to Calculate Memory Utilization on RE
KB20942 - Things which drive RE Memory Utilization, except routes

Prevention
Minimizing Failure Impact Configuring Routing Engine Redundancy and on-disk-failure actions
NSR (Nonstop Routing)
Note: See right column of above link for Configuring Nonstop Active Routing
GRES (Graceful Routing Engine Switchover)
Note: See right column for of above link for Configuring Graceful Routing Engine Switchover
High Availability Configuration Guide
Preventing Failures KB11607 - Periodic Adaptive Standby for RE hard drive
KB11614 - General Guidelines for good logging & tracing


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