Troubleshooting The Mx2020 Host Subsystems; Troubleshooting The Mx2020 Mics - Juniper MX2020 Hardware Manual

Troubleshooting the MX2020 Host Subsystems

Problem
Description: The following alarms and LEDs indicate a problem with a host subsystem Control Board and
Routing Engine (CB-RE):
A red alarm indicates that the host subsystem has been removed.
The red host subsystem OFFLINE LED on the craft interface is lit.
The green host subsystem ONLINE LED on the craft interface is not lit.
Solution
To troubleshooting the host subsystems:
1. Check the LEDs on the faceplate of each CB-RE.
2. Check the LEDs on the craft interface.
3. Use the CLI to check the alarms.
Standalone MX2020 router—Issue the show chassis alarms command to view the alarms.
RELATED DOCUMENTATION
MX2000 Host Subsystem CB-RE Description | 49
MX2020 Craft Interface Description | 31

Troubleshooting the MX2020 MICs

Problem
Description: A MIC LED lit red indicates a problem with the MIC.
Solution
To troubleshoot a MIC:
1. Check the status of each port on a MIC by looking at the LED located on the MIC faceplate. For
information about the meaning of LED states on different MICs. For more information, see the
Series Interface Module Reference
2. Check the status of a MIC by issuing the show chassis fpc pic-status CLI command. The MIC slots in
the MPC are labeled PIC 0/1 and PIC 2/3, top to bottom:
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