Switch Stack Update
  Performing the Stack Update
25
Best Practice User Guide for the Catalyst 3850 and Catalyst 3650 Switch Series
Note To learn the differences for the install and bundle installation modes, see the “Working with the Cisco 
IOS File System, Configuration File, and Software Bundle Files” chapter of the Cisco IOS File System, 
Configuration Files, and Bundle Files Appendix, Cisco IOS XE Release 3SE (Catalyst 3850 Switches)
Step 3 If your switch stack is running in bundle mode, use the request platform software package expand 
switch file to flash command to convert it to install mode.
Step 4 After the .bin file has successfully extracted to flash, change the boot statement and boot to the 
packages.conf file.
Note Since the format of the pacakges.conf file has changed in Cisco IOS XE Release Denali 16.1, overwrite 
the old packages.conf with the new packages.conf file. Perform the above step for eachswitch in your 
stack. If you have a 3 member stack, it will need to be done on flash:, flash-2:, and flash-3.
Note Make sure the tftp server is reachable. To improve performance, increase the tftp block size to 8192. Use 
the ip tftp blocksize bytes command in global configuration mode.
Switch Ports Model              SW Version        SW Image              Mode
------ ----- -----              ----------        ----------            ----
*    1 32    WS-C3850-24P       Denali 16.1.1     CAT3K_CAA-UNIVERSALK9 
BUNDLE
     2 32    WS-C3850-24P       Denali 16.1.1     CAT3K_CAA-UNIVERSALK9 
BUNDLE
     3 32    WS-C3850-24P       Denali 16.1.1     CAT3K_CAA-UNIVERSALK9 
request platform software package expand switch 1 file
flash:cat3k_caa-universalk9.BLD_V161_0_THROTTLE_LATEST_20151116_230450.SSA.b
in to flash::
no boot system
boot system switch all flash:packages.conf
exit
write memory
reload