Upgrade to Catalyst Center 3.1.3
Catalyst Center 3.1.3 is available in a phased rollout. Contact your Cisco sales representative to request access to this release.
There is no upgrade capability from Catalyst Center 2.3.7.x to 3.1.3. You must install Catalyst Center 3.1.3 as a new installation. See the Cisco Catalyst Center Appliance Installation Guide, Release 3.1.3.