350-401 Question 156
Select 3A network engineer is tasked with implementing Policy-Based Routing (PBR) on a Cisco router to ensure that traffic from a specific set of users in VLAN 50 is routed through a dedicated internet connection, rather than the default route. Which of the following steps are required to achieve this configuration?
- A
Create an access control list (ACL) to identify traffic from the specific users in VLAN 50.
- B
Configure a route map to match the traffic identified by the ACL and set the next-hop IP address for the dedicated internet connection.
- C
Apply the route map to the router's outbound interface using the 'ip route-map' command.
- D
Configure a default route to ensure fallback traffic routing for unmatched traffic.
- E
Apply the route map to the appropriate interface using the 'ip policy route-map' command.
Show answer and explanation
Correct answers: A, B, E
Explanation
Policy-Based Routing (PBR) allows traffic to be routed based on criteria other than the destination IP address. To implement PBR, an ACL must first be created to identify the traffic to be routed differently. A route map is then configured to match this traffic and apply the policy, such as setting a specific next-hop IP address. Finally, the route map must be applied to the appropriate interface using the 'ip policy route-map' command. Configuring a default route is not a required step for PBR but may be relevant for handling other types of traffic.
- A. Correct.
Correct: An ACL is required to identify traffic that will be matched by the route map. This is the first step in configuring Policy-Based Routing.
- B. Correct.
Correct: A route map uses the ACL to define the specific policies, including setting the next-hop IP address for the identified traffic.
- C. Incorrect.
Incorrect: The 'ip route-map' command does not exist and is not used to apply a route map to an interface. Instead, the 'ip policy route-map' command is used.
- D. Incorrect.
Incorrect: While configuring a default route may be relevant for general routing, it is not a required step specific to Policy-Based Routing.
- E. Correct.
Correct: The 'ip policy route-map' command is used to apply the configured route map to the desired interface, enabling Policy-Based Routing.