This article provides guidance on how to locate the serial number of the routing engine control board on a Juniper Networks QFX10008 switch, whenever a customer request requires this piece of data to be involved or used for the task to be completed.

A request such as an RMA requires serial number of the routing engine of Juniper Networks QFX10008 to be provided to JTAC team and you are unable to locate the same on the routing engine unit nor on the chassis. The output from command "> show chassis hardware" indicates that the routing engine is built-in, although the hardware guide documents state that this platform can have one routing engine or a second routing engine can be added, and the backup RE is Field-Replaceable Units (FRU). Primary RCB is hot-pluggable while Backup RCB is hot-insertable and hot-removable.

Field-replaceable units (FRUs) are switch components that you can replace at your site. The switch uses

these types of FRUs:

• Hot-insertable and hot-removable: You can remove and replace these components without powering

o@ the switch or disrupting the switching function.

• Hot-pluggable: You can remove and replace these components without powering o@ the switch, but

the switching function is interrupted until you replace the component.

You may gather the serial number of the routing engine control board by running the command "> show chassis hardware" and you will notice that the routing engine row says it is built-in, although you should use the serial number that corresponds to the Control Board named as CB 0 or CB 1.

user@switch> show chassis hardware
Hardware inventory:
Item       Version Part number Serial number   Description
Chassis                AB123       QFX10008
Midplane     REV 28  750-054097  ABCD1234     QFX10008 Midplane
Routing Engine 0     BUILTIN   BUILTIN      RE-QFX10008
Routing Engine 1     BUILTIN   BUILTIN      RE-QFX10008
CB 0       REV 04  750-068820  ABCD1234     Control Board
CB 1       REV 04  750-068820  ABCD1234     Control Board
FPC 6      REV 13  750-068822  ABCD1234     ULC-36Q-12Q28 
 CPU           BUILTIN   BUILTIN      FPC CPU
 PIC 0          BUILTIN   BUILTIN      36X40G
  Xcvr 0    REV 01  740-043308  AB123C4      QSFP+-40G-LR4

IF you are unable to see the serial number of CB 0 nor CB 1 and you still need to gather this information from somewhere, you may look at the hardware component. The serial number ID label for a Routing Control Board is located on the connector end of the unit. See Figure below:

07/07/2023 - KB created.

https://www.juniper.net/documentation/us/en/hardware/qfx10008/qfx10008.pdf

https://www.juniper.net/documentation/us/en/hardware/qfx10008/topics/topic-map/qfx10000-customer-service.html#d78e141

https://www.juniper.net/documentation/us/en/software/junos/interfaces-ethernet/topics/ref/command/show-chassis-hardware.html#show-chassis-hardware-command__subsection_x2t_llp_5rb