BGP Route Map

Question 1

What is a BGP Route Map?

Answer 1

A BGP Route Map is a method to filter or manipulate routing updates based on a set of conditions and actions.

Question 2

How does a BGP Route Map work?

Answer 2

A BGP Route Map consists of a series of statements:

1. ACL or Prefix list to match the prefix address.
2. Named Route Map with permit/deny statement
3. match ACL or Prefix list
4. set different attributes, like local preference and BGP community values.
5. Apply the Route Map to a neighbor inbound or outbound.

Question 3

What are the benefits of using a BGP Route Map?

Answer 3

A BGP Route Map allows you to filter or manipulate routing updates based on various conditions and actions.

Question 4

How do I configure a BGP Route Map?

Answer 4

To configure a BGP Route Map, you can use the route-map command in global configuration mode to define the route map, and then apply it to updates to and from neighbors using the neighbor route-map command in router configuration mode.

Question 5

What are some considerations when using a BGP Route Map?

Answer 5

When using a BGP Route Map, it’s important to consider factors such as:

1. Which neighbors to apply the route map to.
2. Whether to apply it inbound or outbound.
3. How to configure the match and set clauses used by the route map.

Question 6

What are the Route-map steps?

Answer 6

Route-map steps:

1. Prefix-list.
2. Attach prefix list to route-map.
3. Attach route-map to bgp neighbor
4. Set the match set clauses.