Flashcards on Cisco Route-Maps: Network Policy & Routing

Cisco Route-Maps: Network Policy & Routing Explained

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What is a route-map on Cisco devices and what logic does it use for network policies?

A route-map is a tool on Cisco devices that uses if-then logic to implement network policies (match conditions then set actions).

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Cisco route-maps

53 cards

Card 1

Question: What is a route-map on Cisco devices and what logic does it use for network policies?

Answer: A route-map is a tool on Cisco devices that uses if-then logic to implement network policies (match conditions then set actions).

Card 2

Question: How are route-map statements processed?

Answer: They are processed sequentially from top to bottom and stop at the first matching statement.

Card 3

Question: What happens if no route-map statements match?

Answer: An invisible implicit deny at the bottom of the route-map prevents the action (similar to access-lists).

Card 4

Question: What two outcomes occur when evaluating a route-map statement?

Answer: Match: apply the action and stop. No match: continue to the next statement.

Card 5

Question: What does a permit or deny in a route-map statement indicate?

Answer: Permit or deny determines whether the set actions are applied on a match (permit applies set actions; deny does not apply them and continues processin

Card 6

Question: What does an empty route-map statement (no match condition) do?

Answer: An empty statement matches everything.

Card 7

Question: Give examples of match conditions you can use in route-maps.

Answer: Match conditions include prefix-lists, access-lists, BGP attributes (local preference, AS path, communities), packet length, interfaces, and more.

Card 8

Question: How do multiple match conditions behave when placed in a single route-map statement?

Answer: Multiple match conditions in one statement act as a logical OR (any one matching triggers the statement).

Card 9

Question: What kinds of values can set commands change in a route-map?

Answer: Set commands can change metrics, next-hop IP addresses, BGP attributes (local preference, AS path, communities, weight), redistribution tags, DSCP val

Card 10

Question: Can you configure more than one set command in a single route-map statement?

Answer: Yes — multiple set commands can be configured in a single statement.