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Flashcards on Cisco Route-Maps for Network Policy

Cisco Route-Maps for Network Policy: A Student Guide

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What is a route map on Cisco devices, and what is its basic logic?

It's a tool that uses if-then logic to apply network policies: if a condition is met (match), then an action is applied (set).

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Route Maps

13 cards

Card 1

Question: What is a route map on Cisco devices, and what is its basic logic?

Answer: It's a tool that uses if-then logic to apply network policies: if a condition is met (match), then an action is applied (set).

Card 2

Question: How does a route map process its statements?

Answer: Statements are processed sequentially from top to bottom, and processing stops at the first matching statement.

Card 3

Question: What happens if no route map statement matches the input?

Answer: An invisible implicit deny is reached at the end of the route map, similar to access lists.

Card 4

Question: What effect does a route map statement without match conditions have?

Answer: An empty statement (without a match condition) matches everything.

Card 5

Question: What types of match conditions can be used in a route map?

Answer: You can use prefix-lists, access-lists, BGP attributes (such as local preference or AS path), BGP communities, packet length, interface, routing proto

Card 6

Question: What types of set actions can be applied within a route map?

Answer: You can change values such as the output interface, routing protocol metric, BGP attributes (local-preference, AS path, communities, weight), next-hop

Card 7

Question: If you place multiple match conditions in the same statement, how are they evaluated?

Answer: Multiple match conditions in the same statement function as a logical OR (only one needs to match).

Card 8

Question: If you configure multiple set commands in the same statement, what happens?

Answer: Multiple set commands can be configured in a single statement; all of them are applied when the statement matches.

Card 9

Question: Provide a practical example of using a route map for BGP.

Answer: Example: If the prefix matches 192.168.0.0/24 (match), then set the local preference to 500 (set).

Card 10

Question: Provide a practical example of using route maps in routing/redistribution policy (without going into redistribution details).

Answer: Example: If the prefix matches 192.168.4.0/24, then apply a specific action defined by the policy.