This article describes about the configuration commit issue on EX3400 VC caused by 109% usage of /dev/gpt/junos.
Storage usage causing commit issue on the EX3400 VC setup. Below are the sample outputs where fpc 0 is master and fpc 1 is backup.
Below error observed while committing the configuration where /dev/gpt/junos using 109% of switch storage.
error: init: write failed: No space left on deviceerror: configuration check-out failed: daemon file propagation failed
root> show chassis alarms
1 alarms currently active
Alarm time Class Description
2024-05-29 00:51:16 UTC Minor FPC 1 /var partition usage is high
root> show system storage all-members
fpc0:
--------------------------------------------------------------------------
Filesystem Size Used Avail Capacity Mounted on
/dev/gpt/junos 15G 1.4G 13G 109% /.mount
tmpfs 20M 140K 20M 1% /.mount/tmp
tmpfs 653M 604K 653M 0% /.mount/mfs
fpc1:
/dev/gpt/junos 15G 11G 3.7G 10% /.mount
tmpfs 20M 152K 20M 1% /.mount/tmp
tmpfs 610M 800K 609M 0% /.mount/mfs
fpc2:
/dev/gpt/junos 15G 1.4G 13G 10% /.mount
tmpfs 653M 676K 653M 0% /.mount/mfs
Perform steps mentioned below to fix the storage issue:
1. Change the mastership to FPC 1 from FPC 0 using the command "> request virtual-chassis routing-engine master switch" command must be issued from current master.
2. Once the FPC1 is becomes master, commit the configuration changes on the present master (FPC 1).
3. Reboot the FPC 0 to fix the storage issue.
4. Once the reboot is complete, the FPC 0 will rejoin the virtual chassis as backup.
5. Verify the storage percentage used by /dev/gpt/junos
6. Issue the command "> request virtual-chassis routing-engine master switch" to change the mastership from FPC1 to FPC 0 and see if that fixes the storage and commit issue.
7.If above steps doesn't solve the issue, then perform format install on problematic VC member by isolating it from VC.
Procedure to format install EX2300 switches: https://supportportal.juniper.net/s/article/EX-How-to-format-install-EX2300s-and-EX3400s-via-USB?language=en_US