After upgrading the device from Junos OS version 19.4R3-S7.3 to 21.2R3-S8.5 and performing a reboot, the primary Routing Engine (RE0) entered amnesiac mode, indicating a loss of configuration and booting into the loader prompt.
Console Logs
kern.moduLoading JUNOS chassis module
chassis_init_hw_chassis_startup_time: chassis startup time 0.000000, shared: 0x7ffffffff300, base: 0x7ffffffff000, offset: 0x300
le_path: /packages/sets/pending/boot/junos-net-platform;/packageIPsec: Initialized Security Association Processing.
s/sets/pending/boot/junos-modules-platform;/packages/sets/pending/boot/os-kernelfuse-freebsd: version 0.4.4, FUSE ABI 7.8
;/packages/sets/pending/boot/os-crypto;/packages/sets/pending/boot/netstack;/packages/sets/pending/boot/junos-modules -> /modules;/modules/dev;/modules/ifpfe_drv;/modules/ifpfe_media;/modules/jam_core;/modules/jam_plugin;/modules/peertype;/modules/platform
Loading the CHMIC module
^B^@^B^@^@^@^@^@qualys_scanner^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^Nid^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^B^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^A^B^@^F^A^A^@^@^@^@^B^@^@^@^@SC_ASEJ_Mgmt^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^L^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^C^@^@^@^@Loading POS driver
^NB
^@^B^@^GScript /etc/rc.d/kldload interrupted
bcmsdk_5_9_x kld
Loading BCMSDK module.....
bcm_sdk_init(): DevID = 0xb680, RevID = 0x12
bcm_sdk_init: device ID: dev: 0xb680, rev: 0x12
...
Creating initial configuration: ...
^E^A^@^A^@^@^@^@^@^@A^@l^@^K^@^@^@^@^@^@^@^@^@^\Mq]huo$5^\%^Cޭ^@^@^@^@^@^@^@^@^@^@^@^@status
^Z^@^@^@^@^@^@^K^@^F^A^@^@^A@^@^@^@^@^@Quit (core dumped)
Warning: Failed to commit active configuration.
Warning: Trying to commit recovery mode configuration.
mgd: error: schema header sequence numbers mismatch for pkg base
mgd: error: schema header sequence numbers mismatch for pkg junos-base
mgd: error: schema header sequence numbers mismatch for pkg jkernel
mgd: error: schema header sequence numbers mismatch for pkg aaad
mgd: error: schema header sequence numbers mismatch for pkg access_line
mgd: error: schema header sequence numbers mismatch for pkg ancpd
mgd: error: schema header sequence numbers mismatch for pkg appsecure
mgd: error: schema header sequence numbers mismatch for pkg aprobe
mgd: error: schema header sequence numbers mismatch for pkg apsd
mgd: error: schema header sequence numbers mismatch for pkg authd_cmd
mgd: error: schema header sequence numbers mismatch for pkg autoconfd_cmd
mgd: error: schema header sequence numbers mismatch for pkg bfdd
mgd: error: schema header sequence numbers mismatch for pkg cfm
mgd: error: schema header sequence numbers mismatch for pkg chassis_cmd
mgd: error: schema header sequence numbers mismatch for pkg clksyncd
mgd: error: schema header sequence numbers mismatch for pkg collector
mgd: error: schema header sequence numbers mismatch for pkg cos_cmd
mgd: error: schema header sequence numbers mismatch for pkg cpcdd_cmd
mgd: error: schema header sequence numbers mismatch for pkg dcd_cmd
mgd: error: schema header sequence numbers mismatch for pkg demuxd
mgd: error: schema header sequence numbers mismatch for pkg dfcd_cmd
mgd: error: schema header sequence numbers mismatch for pkg dot1xd
mgd: error: schema header sequence numbers mismatch for pkg dyn-sess-prof
mgd: error: schema header sequence numbers mismatch for pkg elmi
mgd: error: schema header sequence numbers mismatch for pkg essmd
mgd: error: schema header sequence numbers mismatch for pkg forwarding_options_cmd
mgd: error: schema header sequence numbers mismatch for pkg fsad
mgd: error: schema header sequence numbers mismatch for pkg gres-test-point
mgd: error: schema header sequence numbers mismatch for pkg httpd_cmd
mgd: error: schema header sequence numbers mismatch for pkg iccp_cmd
mgd: error: schema header sequence numbers mismatch for pkg ilmid
mgd: error: schema header sequence numbers mismatch for pkg jappid
mgd: error: schema header sequence numbers mismatch for pkg jcrypto
mgd: error: schema header sequence numbers mismatch for pkg jcrypto_junos
mEnter full pathname of shell or RETURN for /bin/^CG@-^@@^@M^@S^@ ^@S^@Q^@L^@ ^@Q^@u^@e^@r^@y^@ ^@A^@n^@a^@l^@y^@z^@e^@r^@1^@0^@.^@1^@0^@.^@1^@0^@.^@1^@1^@9^@O^@D^@B^@C^@NTLMSSP^@^A^@^@^@^^@%^@^@^@^E^@^E^@ ^@^@^@NT4DCVULNTEST^@swapon: /dev/gpt/swap: Device already in use
@ 1760511043 [2025-10-15 06:50:43 UTC] verify active ...
Verified junos-libs-x86-64-20211222 signed by PackageProductionEC^Chned by PackageProductionECP256_2021 method ECDSA256+SHA25^C^A^EScript /etc/rc.d/mount interrupted
^@@^A@^@^@^C^A^B^@^B^A^\ Enter full pathname of shell or ^C^@2^@^^C^B^A ^A^G^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@swapon: /dev/gpt/swap: Device already in use
^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@@ 1760511049 [2025-10-15 06:50:49 UTC] verify acti^Chcript /etc/rc.d/verify interrupted
@ 1760511049 [2025-10-15 06:50:49 UTC] mount start
R^K^[8F@ 1760511049 [2025-10-15 06:50:49 UTC] junos 19.4R3-S7.3
;oad: 0.93 cmd:^\^@^L^@^K^@^[^@^Z^@^G^@^CScript /etc/rc.d/mount interruEnter full pathn^C^B^B^B^A^A^A^@^P^@^N^@http/1.1^Bh2^@;oad: 0.93 cmd:^\^@^L^@^K^@^[^@^Z^@^G^@^CScript /etc/rc.d/mount interruEnter full pathn^^@@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^^C^Bhb !C]oad: 0.93 cmd: sh 23865 [running] 0.29r 0.00u 0.00s 0% 2008k
load: 0.93 cmd: sh 23865 [running] 0.29r 0.00u 0.00s 0% 2008k
C~wa{^@^@z^@k@^L^@^K^@^[^@
^@ ^@^Z^@^G^@^C^@@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^@^^C^AhS,^E5[+y^L^@^@z^@k^@gload: 0.93 cmd: sh 23865 [ttyout] 0.91r 0.00u 0.00s 0% 2008k
E^@9^@3^\^@^L^@^K^@^[^@
^@ ^Z^@^G^@ ^C^@^A^@^P^@Script /etc/rc.d/media interrupted
^@^O^@^K^@^B^A^@@ 1760511051 [2025-10-15 06:50:51 UTC] verify active ...
^R
^@^A^@^P^@^@^O^@^C^@hScript /etc/rc.d/verify interrupted
@ 1760511051 [2025-10-15 06:50:51 UTC]^ZScript /etc/rc.d/mount interru^C^@hcript /etc/rc.d/ldconfig interrupted
iemoving /etc/malloc.conf
@yR^YI"^@zcking platform support for: mx960
(k^@g^C^@@^@@@^@@Q^K^[E@ 1760511052 [2025-10-15 06:50:52 UTC] mountlate start
hw.re.gres_sync_other: 1 -> 1
@ 1760511052 [2025-10-15 06:50:52 UTC] mountlate done
FreeBSD/amd64 (Amnesiac) (ttyu0)
login:
login: Oct 15 06:51:18 irsd.log[28190]: UI_DBASE_OPEN_FAILED: Database open failed for file '/var/run/db/juniper.data': No such file or directory
Oct 15 06:51:18 irsd.log[28190]: UI_CONFIGURATION_ERROR: Process: <unknown>, path: <none>, statement: <none>, Opening configuration database: Could not open configuration database
Oct 15 06:51:18 irsd.log[28190]: IRSD config read failed
Oct 15 06:51:18 lacpd[28193]: UI_SCHEMA_SEQUENCE_ERROR: Schema sequence number mismatch
Oct 15 06:51:18 lacpd[28193]: UI_CONFIGURATION_ERROR: Process: <unknown>, path: <none>, statement: <none>, Opening configuration database: Could not open database schema
Our investigation indicates that this behavior was likely triggered by user-initiated console interrupts during startup—such as key presses—which can prevent the system from properly loading its configuration and filesystem.
To recover, we disconnected the console and performed a clean reboot, after which the system booted normally.
We have advised the customer to investigate console access logs to determine if any users were interacting with the device via the console during the reboot window.