A campus router has BGP multipath enabled and sends cloud traffic across both AWS tunnels. The design wants outbound traffic on tunnel 1 only. Tunnel 2 should remain a backup. What should you set?
Select an answer to reveal the explanation.
Short Explanation
You told the router the two roads are equal, and it believed you. You give the routes from tunnel 1 a better local preference so outbound traffic uses that tunnel. Tunnel 2 can stay up as the backup without sharing the load.
Full Explanation
BGP multipath installs more than one path when the decision ties. Both AWS tunnels are tying, so traffic is split. A better local preference on the routes learned from tunnel 1 breaks the tie in that tunnel's favor and leaves tunnel 2 installed only if it is still a valid worse path, or available when tunnel 1 withdraws. Equal preference keeps the tie. The virtual private gateway has no OSPF cost. A shorter IKE lifetime does not turn multipath off. Exam caveat: local preference steers this router's outbound choice. It does not tell AWS which tunnel to use for return traffic. Operational check: show ip bgp for the cloud prefix should mark tunnel 1 as best, and tunnel 2 should not be installed as an equal path.