Difference for PORTFAST & BPDUFILTER used globally or at interface-level
Portfast + bpdufilter (used together) can be enabled globally or at interface level.
Although the first impression is that the only difference is the global or per-interface effect, this is not entirely true and another subtle and important difference is described in this post.

Costi is a network and security engineer with over 10 years of experience in multi-vendor environments. He holds a CCIE Routing and Switching certification and is currently pursuing same expert-level certifications in other areas. He believes that the best way to learn and understand networking topics is to challenge yourself to fix different problems, production-wise or lab-type exams. He also enjoys teaching networking and security technologies, whevever there is an opportunity for it.
