A network engineer deployed Cisco MPLS TE tunnels on the service provider network to steer the traffic over those tunnels to optimize the bandwidth utilization.
Which two configurations can send the traffic to the Cisco MPLS TE tunnel interfaces? (Choose two.)
Sure, I'll be happy to provide you with a detailed explanation!
MPLS TE (Traffic Engineering) tunnels are used to optimize the bandwidth utilization in a service provider network. When deploying MPLS TE tunnels, there are multiple ways to send traffic over these tunnels. Let's look at each of the options given in the question and see which ones are correct:
A. Applying the fast-reroute per-prefix command: Fast Reroute (FRR) is a technique used to provide backup paths in case of a link or node failure. While FRR is a useful feature, it is not directly related to sending traffic over MPLS TE tunnels. Therefore, this option is not correct.
B. Static route pointing down to the Cisco MPLS TE interface tunnel: This is a valid way to send traffic over an MPLS TE tunnel. By configuring a static route with the next hop as the MPLS TE tunnel interface, the traffic will be forwarded over the tunnel. Therefore, this option is correct.
C. Applying the autoroute announce command under the Cisco MPLS TE interface tunnel: When the autoroute announce command is applied to an MPLS TE tunnel interface, it automatically advertises the tunnel as the preferred path for traffic. This is a useful command to use when there are multiple paths to a destination and the traffic needs to be steered towards a specific path. Therefore, this option is correct.
D. Enabling LFA calculation: Loop-Free Alternate (LFA) calculation is another FRR technique used to provide a backup path in case of a link or node failure. As mentioned earlier, FRR is not directly related to sending traffic over MPLS TE tunnels. Therefore, this option is not correct.
E. Applying an explicit-path command under the Cisco MPLS TE interface tunnel: An explicit path is a predefined path that traffic takes through the network. By configuring an explicit path under an MPLS TE tunnel interface, traffic is forced to take that path. This is a valid way to send traffic over MPLS TE tunnels. Therefore, this option is correct.
In summary, the two correct configurations that can send traffic to Cisco MPLS TE tunnel interfaces are: