Overall, I am trying to find any information if I need to upgrade my sups to 720-3Cs or can I cost save and upgrade the IOS on my 720-3Bs. Would a 6716-10G line card be compatibable with a 720-3B?
You should almost never apply a spanning-tree portfast trunk command to another cisco switch. If you go back to the basics... spanning-tree portfast allows the ports to skip the blocking to fowarding states and go immediately to forwarding. The spa...