Route Maps and Conditional Forwarding

3 important questions on Route Maps and Conditional Forwarding

How is an Extended ACL used for BGP network selection?

The Source and Source wildcard are used for matching the network portion.
The Destination and Destination wildcard are used for matching the network mask portion.

What are the 4 components of a Route Map?

  1. Sequence number
  2. Conditional Matching Criteria
  3. Processing Action (Permit or Deny)
  4. Optional Action (Modify, Add, Remove route characteristics)

What are 5 rules that apply to route-map statements?

  1. If a processing action is not provided, the default value of Permit is used.
  2. Sequence number increments by 10 automatically if not provided.
  3. If matching statement is not included, an implied All Prefixes is associated with the statement.
  4. Processing of a Route Map stops after all optional actions have been processed after matching a matching criterion.
  5. An implicit deny or drop is associated for prefixes that are not associated with a permit action.

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