Disable DST on Cisco ISE

[sina.naser]

Hi everyone,

How to disable DST for Cisco ISE appliance without changing timezone?

Tnx in advance

[Tariq Mahmoud]

You can't. The only way is by doing a time zone change, steps are here:
clock timezone https://www.cisco.com/c/en/us/td/docs/security/ise/3-1/cli_guide/b_ise_cli_reference_guide_31/b_ise_CLIReferenceGuide_31_chapter_011.html#wp3051495440

However, this is usually not recommended and might cause issues with ISE. Cisco recommends the reimage to change the time zone. 

[ahollifield]

FWIW on newer versions (OP doesn't specify what version of ISE they are running) I haven't had issues changing timezones post deployment.  The Live Logs are funky for a couple of hours until the timezone change settles but I've seen no real practical impacts in my experience.  

[Tariq Mahmoud]

Indeed, on newer versions issues are rarely seen after such modification but since I didn't know which version the OP is using, I had to mention it