This document explains the reason for the appearance of a minor alarm, 'RE x Mismatch in total memory detected on SRX-5K devices
On the device, active alarms are displayed when the system alarms command is executed:
show chassis alarms
node1:
--------------------------------------------------------------------------
1 alarms currently active
Alarm time Class Description
2026-02-09 17:16:59 AEDT Minor RE 0 Mismatch in total memory detected
This behavior is seen when one or more of the following conditions are met:
Login into shell mode on the affected device and execute the following commands
SRX RE3 needs 128GB of memory. If dmidecode -t 17 | awk '/Size: [0-9]+ MB/{s+=$2} /Size: [0-9]+ GB/{s+=$2*1024} END {print s}' shows 128 GB, then the alarm can be ignored
user@host> start shell
user@host
user@host:~ # vhclient -s
Last login: Wed Feb 11 22:30:27 2026 from 192.168.1.1
user@host:~# dmidecode | grep Size.*B
Runtime Size: 128 kB
ROM Size: 8 MB
Installed Size: 384 kB
Maximum Size: 384 kB
Installed Size: 1536 kB
Maximum Size: 1536 kB
Installed Size: 15 MB
Maximum Size: 15 MB
Size: 32 GB
Range Size: 128 GB
Range Size: 32767 MB
user@host:~# dmidecode -t 17 | awk '/Size: [0-9]+ MB/{s+=$2} /Size: [0-9]+ GB/{s+=$2*1024} END {print s}'
131072
If dmidecode -t 17 | awk '/Size: [0-9]+ MB/{s+=$2} /Size: [0-9]+ GB/{s+=$2*1024} END {print s}' shows a value less than 131072, there is some memory missing, try rebooting the RE to recover it.
Restart/Reboot the RE:
user@host> request system reboot
user@host> request system
Restart/Reboot vmhost:
user@host> request vmhost reboot <re0 | re1> <routing engine>
Even after a reboot, the alarm is not cleared. Please reach out to JTAC for further assistance