! 125
Chapter 14
Monitoring the Routing Engine
You monitor and maintain the Routing Engine, a key router component, to ensure
that all system processes function normally, including routing protocols, packet
forwarding tables, router interfaces, system management, JUNOS software and file
system storage, and monitoring functions. (See Table 31.)
Table 31: Checklist for Monitoring the Routing Engine
Monitor Routing Engine Tasks Command or Action
Understanding the Routing Engine on page 127
! Routing Engine Types and Characteristics on page 127
! Routing Engine Locations on page 130
! Routing Engine Redundancy on page 135
! Routing Engine Component Companionship on page 135
! Routing Engine Boot Devices on page 135
! Routing Engine Storage Media on page 136
Monitoring the Routing Engine Status on page 136
1. Check the Detailed Routing Engine Status on page 137 show chassis routing-engine
show chassis environment routing-engine
2. Check the Routing Engine LEDs on page 138 ! Check the M7i Routing Engine LEDs on page 139
! Check the M20 Router Routing Engine LEDs on page 140
! Check the M40 Router Routing Engine LEDs on page 142
! Check the M40e and M160 Router Routing Engine LEDs on
page 143
! Check the M320 Router Routing Engine LEDs on page 144
! Check the T320 Router Routing Engine LEDs on page 144
! Check the T640 Routing Node Routing Engine LEDs on
page 145
3. Check the Redundant Routing Engine Status from the Craft
Interface CLI Output on page 146
show chassis craft-interface
Verifying Routing Engine Failure on page 149
1. Check Core Files If the Routing Engine Reboots on page 149 ! List the Core Files Generated After A Crash Occurs on
page 149
! Display the Messages Log File After A Crash Occurs on
page 150
! Example of When No Core File Is Generated on page 150
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