This article explain the behaviour of the chassis JNP10008 which a universal chassis and can be used as QFX10008 as well as PTX10008 depending on the RE that customer uses.
If by mistake customer insert the QFX RE in the chassis with the personality of PTX10008 the RE is accepted however you receive the below alarm.
labroot@ptx10008> show chassis alarms
4 alarms currently active
Alarm time Class Description
2024-01-17 01:02:57 UTC Minor Mixed Master and Backup RE types
2024-01-17 01:02:53 UTC Minor CPU DRAM size mismatch for Master and Backup RE
You would see the below alarm on the chassis.
Upon checking the show chassis hardware you would see that different RE's are inserted in the slots.
labroot@ptx10008> show chassis hardware | no-more
Hardware inventory:
Item Version Part number Serial number Description
Chassis GD835 JNP10008 [PTX10008] >>>>>>>>>>>>>>>>> chassis has the personality of PTX10008
Midplane REV 15 750-095179 BCEA2733 Midplane 8
Routing Engine 0 BUILTIN BUILTIN RE-PTX-2X00x4 >>>>>>>>>>>>>>>>> RE0 is a PTX RE expected to be used in the chassis with PTX personality
Routing Engine 1 BUILTIN BUILTIN RE-QFX10008 >>>>>>>>>>>>>>>>> RE1 is a QFX RE expected to be used in the chassis with QFX personality
CB 0 REV 16 750-075572 BCBY2758 Control Board
CB 1 REV 11 750-068820 BCDD0405 Control Board
FPC 0 REV 54 750-051357 BCBX3251 LC1101 - 30C / 30Q / 96X
Since the chassis is same and only RE makes the difference and decides on the personality of the box you would see the alarm when there is a MIX of both RE's on the box.
Replace the RE1 with the correct RE type and the alarm should go away.