300-415 Question 122
Select 2A network engineer is configuring a Cisco SD-WAN deployment for a branch location where multiple internet circuits are available. The engineer wants to ensure that the traffic from one circuit can fail over to another in case of a link failure. Additionally, the engineer needs to extend connectivity to a remote location where a direct physical connection to the primary branch router is unavailable. Which configuration should the engineer implement to achieve this?
- A
Configure TLOC-extension between the branch routers.
- B
Enable DIA (Direct Internet Access) on all circuits.
- C
Use an IPsec tunnel between the remote site and the branch routers.
- D
Deploy separate TLOCs for each circuit.
- E
Associate data tunnels with TLOCs on the primary branch router.
Show answer and explanation
Correct answers: A, E
Explanation
To provide circuit redundancy and extend connectivity to a remote location, TLOC-extension must be configured between branch routers. By associating data tunnels with TLOCs on the primary branch router, traffic can failover dynamically between circuits in case of a link failure. This ensures high availability and consistent connectivity across the SD-WAN fabric.
- A. Correct.
Correct. TLOC-extension allows traffic from one transport circuit to utilize another circuit in case of failure, providing redundancy and seamless failover.
- B. Incorrect.
Incorrect. While DIA can provide internet connectivity, it does not inherently enable failover between circuits or extend connectivity to remote locations.
- C. Incorrect.
Incorrect. An IPsec tunnel could provide secure connectivity to a remote site, but it does not address the issue of circuit redundancy or failover.
- D. Incorrect.
Incorrect. Deploying separate TLOCs for each circuit provides independent transport paths but does not enable failover between circuits or extend connectivity.
- E. Correct.
Correct. Associating data tunnels with TLOCs on the primary branch router ensures that traffic can dynamically switch between TLOCs, enabling redundancy and extending connectivity.