• Tagging provides a way to mark common or similar routes to manipulate later.
• In redistribution scenarios with mutual redistribution on two different routers, any routes that gets redistributed from one route process to another are tagged.
  • When the other router sees those tags on the route, that route to keep from adding non-optimal routes to its routing table.
• Tags can also be used to do other manipulation such as setting higher metrics or changing ADs.

OSPF

I’m scheduled to take the CCIE R&S Written exam on 10 July at Cisco Live, and I’ve been asked by a handful of people on Twitter exactly what materials I’m using.  I figured it would be a good idea to let everyone know so that we all can determine whether or not I’m on the right track.  I may get to the exam and find out that the books I’ve been reading aren’t even close.  It’s happened before.