This article provides documentation on how to configure Cisco ISE and Juniper EX Switches for 802.1X-Based Authentication.
The customer needs to deploy Cisco ISE and Juniper EX Switches for 802.1X-Based Authentication, and they need some guidance on how to configure both sides.
A complete guide about this topic is available in the article below, feel free to review carefully. If you have any further queries upon your own design attempt, proceed to open a case with Juniper TAC team.
https://www.juniper.net/documentation/us/en/software/nce/nce-213_ex_and_cisco_ise/topics/topic-map/nce-213-ex-series-switch-cisco-ise.html