Hi,
I create a very simple lab on CML (3 routers and 1 switch) and I noticed that even if the routers are connected to an unmanaged switch that is powered off the status of the interfaces on the routers are up/up
Not sure if this is a bug and if it has been already submitted but I wanted to share this with you so if you start your troubleshooting and see the interface up/up this doesn't mean that they are really up and you'll go straight to check the switch :-)
Adding a screenshot:
Thank you