I am not able to downgrade Cisco Router NCS540 IOS-XR from 7.9.2 to 7.7.21 (recomended in Cisco Downloads site).
RP/0/RP0/CPU0:dc-borda-2#show install log 73
Thu Oct 17 15:35:29.572 -03
2024-10-15 11:14:50 Install operation 73 started by root:
2024-10-15 11:14:50 install activate pkg ncs540-mini-x-7.7.21
2024-10-15 11:14:55 No install operation in progress at this moment
2024-10-15 11:14:55 Checking system is ready for install operation
2024-10-15 11:14:56 'install activate' in progress
2024-10-15 11:14:56 ISO ncs540-mini-x-7.7.21 in input package list. Going to upgrade the system to version 7.7.21.
2024-10-15 11:15:09 Optimized list to prepare after sanitizing input list for superseded packages:
ncs540-mini-x-7.7.21
2024-10-15 11:15:09 Package list:
2024-10-15 11:15:09 ncs540-mini-x-7.7.21
2024-10-15 11:15:09 The operation is past point-of-no-return and can no longer be stopped!
2024-10-15 11:15:09 Action 1: install prepare action started
2024-10-15 11:15:09 Triggering prepare operation.
This may take a while...
2024-10-15 11:15:10 Error! The following package(s) is/are required to be activated as part of this operation:
2024-10-15 11:15:10 ncs540-k9sec
ncs540-mgbl
ncs540-lictrl
ncs540-mpls
ncs540-li
ncs540-mcast
ncs540-mpls-te-rsvp
ncs540-ospf
ncs540-eigrp
ncs540-isis
2024-10-15 11:15:15 Ending operation 73
2024-10-15 11:15:15 Install operation 73 aborted
