Hello,
The current situation I am facing is our headend router (an ASR 1002X) is acting as a hub and spoke for our 30 remote sites, and they all currently feed off of a /24 mesh with the head end router using a physical interface IP (Not sub interfaces for each spoke). What I want to do is move this to sub interfaces so I can shape each site per their site's bandwidth going out to the remote sites from the head end. I have tested and was able to assign an IP to the physical interface AND to sub interfaces, while retaining routing adjacencies on both interfaces. Has anyone ever tested this out and if so, have you encountered any bugs? Once I have the sub interfaces assigned, the physical interface IPs will be removed.