Cisco ISE NTP Keys - SHA256/SHA512 : networking
I have run into this problem as well using Cisco IOS-XE Catalyst Switches as NTP sources. Can not get Cisco ISE to NTP auth with anything but MD5. I am also on ISE 2.7 Patch 4. I have 3 keys set up, all the same phrase for MD5, SHA-256, and SHA-512.