Then, on EIGRP: deny tags 250 .

She typed:

In the fluorescent-lit server room of a mid-sized telecom firm, intern Priya plugged a dusty hard drive into her laptop. The label read: INE CCNP R/S v2 – 2015 – HQ By Keith Bogart .

Her boss, watching over her shoulder, whispered: “Where did you learn that?”

She clicked the first video. Keith Bogart’s calm, granular voice filled the silence: “Welcome. Today, we’re redistributing between EIGRP and OSPF on a single HQ router. If you do this wrong… you’ll blackhole your entire Chicago office.”

That night, the live network crashed. Senior engineers were offline. Priya, heart pounding, opened a console. Route redistribution loop. She remembered Keith’s warning: “Administrative distance will betray you unless you set tags.”