5.1 Explain the Process of Troubleshooting Connectivity Issues Between Sites SD-WAN-ENGINEER Practice Questions (Page 3)

Questions 11–15

1. 11expert · hard

   A company has two branches, A and B, that cannot communicate. Both branches can reach the data center. The SD-WAN fabric is a full mesh. You check the tunnel status and see that the direct tunnel between A and B is 'up'. You run a ping from branch A's appliance to branch B's appliance and it succeeds. However, a ping from a user on branch A's LAN to a user on branch B's LAN fails. What is the MOST likely cause?

   • AThe firewall on branch A is blocking traffic to branch B's LAN subnet.
   • BThe user on branch B's LAN is powered off.
   • CThe routing on branch A or B is not advertising the LAN subnets over the direct tunnel.
   • DThe direct tunnel between A and B is not actually carrying user traffic.
   Reveal Solution Discussion Select an answer first
2. 12application · medium

   You have identified that a branch site's connectivity issue is caused by a misconfigured path selection policy that is sending traffic over a high-latency link. You correct the policy. What is the BEST way to validate that the fix is effective?

   • ACheck the routing table on the data center appliance.
   • BOpen a ticket with the ISP to confirm the new link is stable.
   • CMonitor the tunnel statistics and run an end-to-end connectivity test from the branch to the data center.
   • DReboot the branch appliance to ensure the new policy is applied.
   Reveal Solution Discussion Select an answer first
4. 13foundation · easy

   An engineer has identified a misconfigured route as the cause of a connectivity issue and corrected it. What is the most appropriate next step to ensure the issue is fully resolved?

   • ARemove the route to prevent future issues
   • BVerify that the routing table now contains the correct route and that traffic flows as expected
   • CImmediately inform the users that the issue is resolved
   • DRestart the SD-WAN device to apply the change
   Reveal Solution Discussion Select an answer first
5. 14application · medium

   A branch site cannot reach a server at the data center. You check the SD-WAN appliance's routing table and see that the destination prefix is present, but the next hop points to a tunnel that is currently 'down'. What is the MOST likely reason the branch cannot reach the server?

   • AThe SD-WAN controller is not reachable from the branch.
   • BThe branch's local LAN is misconfigured.
   • CThe routing table is stale and the appliance is trying to forward traffic over a failed tunnel.
   • DThe server at the data center is powered off.
   Reveal Solution Discussion Select an answer first
6. 15foundation · easy

   An engineer is troubleshooting a connectivity issue between two SD-WAN sites. Users at the remote site report that they can reach some applications but not others. Which symptom is most indicative of a routing or path-selection problem rather than a complete link failure?

   • AAll traffic between the sites fails, and the tunnel status shows down.
   • BSome applications work while others time out, and the tunnel is up.
   • CThe remote site's firewall is blocking all inbound traffic from the hub.
   • DThe remote site cannot reach the internet, but site-to-site traffic works.
   Reveal Solution Discussion Select an answer first