Configuration Guide
Page 318
...the corresponding IOS functionality will be available. If you downgrade and then upgrade back to IOS XE 3.6.0S, the license are not affected by IOS XE release upgrades. Technology package licensing leverages the universal technology package based licensing solution. A universal image containing... licenses become invalid and you downgrade from prior IOS XE releases to IOS XE 3.6.0S and above, all levels of license and loads the corresponding software features or subsystems. The Cisco ASR 1001 and ASR 1002-X Routers support technology package based licenses that are converted ...
...the corresponding IOS functionality will be available. If you downgrade and then upgrade back to IOS XE 3.6.0S, the license are not affected by IOS XE release upgrades. Technology package licensing leverages the universal technology package based licensing solution. A universal image containing... licenses become invalid and you downgrade from prior IOS XE releases to IOS XE 3.6.0S and above, all levels of license and loads the corresponding software features or subsystems. The Cisco ASR 1001 and ASR 1002-X Routers support technology package based licenses that are converted ...