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SNMP OID for CPU utilization returns 0 for other routing-engine in an EX Switch Virtual chassis

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Article ID: KB19179 KB Last Updated: 04 Mar 2017Version: 2.0
Summary:
SNMP OID for CPU utilization returns 0 (zero) for other routing-engine in an EX Switch Virtual chassis.
Symptoms:
The 10.0R4 Junos version is not reporting CPU utilization correctly for backup, or other RE, via SNMP for the EX4200 in a Virtual Chassis (VC)

SNMP OID for getting CPU utilization:

.1.3.6.1.4.1.2636.3.1.13.1.8.9.1.0.0 <----- this is for RE0 or master

.1.3.6.1.4.1.2636.3.1.13.1.8.9.2.0.0 <----- this is for RE1 or backup

{master:1}
test@prompt> show snmp mib walk decimal .1.3.6.1.4.1.2636.3.1.13.1.8.9
jnxOperatingCPU.9.1.0.0 = 0 =====RE0
jnxOperatingCPU.9.2.0.0 = 7 =====RE1
test@prompt > show chassis routing-engine
Routing Engine status:
Slot 1:
Current state Master
Election priority Backup (default)
Temperature 34 degrees C / 93 degrees F
CPU temperature 34 degrees C / 93 degrees F
DRAM 1024 MB
Memory utilization 40 percent
CPU utilization:
User 6 percent
Background 0 percent
Kernel 1 percent
Interrupt 0 percent
Idle 92 percent
Model EX4200-48T, 8 POE
Serial ID BP0210026653
Start time 2010-08-29 08:22:08 EDT
Uptime 10 days, 1 hour, 4 minutes, 21 seconds
Last reboot reason Router rebooted after a normal shutdown.
Load averages: 1 minute 5 minute 15 minute
0.29 0.24 0.19

Routing Engine status:
Slot 2:
Current state Backup
Election priority Backup (default)
Temperature 35 degrees C / 95 degrees F
CPU temperature 35 degrees C / 95 degrees F
DRAM 1024 MB
Memory utilization 26 percent
CPU utilization:
User 0 percent
Background 0 percent
Kernel 0 percent
Interrupt 0 percent
Idle 99 percent
Model EX4200-48T, 8 POE
Serial ID BP0210046802
Start time 2010-08-29 08:22:05 EDT
Uptime 10 days, 1 hour, 4 minutes, 24 seconds
Last reboot reason Router rebooted after a normal shutdown.
Load averages: 1 minute 5 minute 15 minute
0.00 0.04 0.00



We do see output only for one routing-engine and the other shows 0.

Solution:
The issue is resolved in JUNOS releases 10.0S10, 10.1R4, and all later JUNOS releases.




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