Route maps

• Cisco (and zebra) provide “route maps” for community tagging and policy application.

• Route maps have “match clauses” which tell them which routes they're supposed to care about.

• They also have “set” clauses which tell them what policy to apply.

• Absence of a match clause makes the route-map match everything.

• Absence of a set clause makes it set nothing (but halts continued evaluation of the route-map)