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In FEX related outputs like "show fex detail" or "show inventory" different FEX serial numbers are used (FEX' chassis SN and FEX' supervisor SN). This bug is to unify which SN is being displayed. In fixed version only FEX Chassis SN will be displayed (the same as on the label of physical device).
Parent device is Nexus 9000 series running affected release. Feature-set fex enabled.
This is cosmetic issue. To get unified outputs - software upgrade is needed.
Example of outputs which show Supervisor SN instead of Chassis SN: Software BIOS: version 07.68 NXOS: version 9.3(7) BIOS compile time: 05/26/2020 NXOS image file is: bootflash:///nxos.9.3.7.bin NXOS compile time: 3/10/2021 3:00:00 [03/10/2021 13:39:29] F241.01.25-N9K-C9372PX-1# show fex detail FEX: 101 Description: FEX0101 state: Online FEX version: 9.3(7) [Switch version: 9.3(7)] FEX Interim version: 9.3(7) Switch Interim version: 9.3(7) Extender Model: N2K-C2248TP-1GE, Extender Serial: FOC16233FJV >>>>>>>> FEX supervisor SN Part No: 73-13232-01 Card Id: 99, Mac Addr: d8:67:d9:d7:16:c2, Num Macs: 64 Module Sw Gen: 12594 [Switch Sw Gen: 21] pinning-mode: static Max-links: 1 Fabric port for control traffic: Eth1/47 FCoE Admin: false FCoE Oper: true FCoE FEX AA Configured: false Fabric interface state: Po1 - Interface Up. State: Active Eth1/47 - Interface Up. State: Active Fex Port State Fabric Port Eth101/1/1 Down Po1 ... snip ... Eth101/1/48 Down Po1 NAME: "FEX 101 CHASSIS", DESCR: "N2K-C2248TP-1GE CHASSIS" PID: N2K-C2248TP-1GE , VID: V03 , SN: SSI162008WS NAME: "FEX 101 Module 1", DESCR: "Fabric Extender Module: 48x1GE, 4x10GE Supervisor" PID: N2K-C2248TP-1GE , VID: V03 , SN: FOC16233FJV >>>>>>>>>>>>>>>>>>>>>>>>>>>>>
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