Login to VX9000 via SSH client ( putty.exe)
run the bellow command
VX9000 version 220.127.116.11-030R
Copyright (c) 2004-2015 Symbol Technologies, Inc. All rights reserved.
Booted from primary
vx9000-BC14Z5 uptime is 1 days, 22 hours 07 minutes
CPU is Intel(R) Xeon(R) CPU E5-2650 0 @ 2.00GHz
Base ethernet MAC address is 99-50-56-BC-14-A5
System serial number is 765DQE23D975DZ09
Model number is VX-9000-0000-WR
The output of CLI command 'show version' contains the serial number of the VX9000.