JNCIS-ENT: Juniper Networks Certified Specialist – Enterprise Routing and Switching (2025) — Question 11

What are three requirements to ensure proper GRE or IP-IP tunnel routing? (Choose three.)

Answer options

• A. Keepalives must be used on stateless tunneling protocols.
• B. Tunnel endpoints must have a route that directs traffic into the tunnel.
• C. BGP must be used on intermediate devices.
• D. Tunnel endpoints must have a valid route to the remote endpoint.
• E. All intermediary devices must have a route to the tunnel endpoints.

Correct answer: B, D, E

Explanation

The correct answers are B, D, and E because having a route directing traffic into the tunnel, a valid route to the remote endpoint, and ensuring all intermediary devices can reach the tunnel endpoints are critical for proper tunnel operation. Option A is incorrect as keepalives are not a requirement for stateless tunneling protocols, and option C is not necessary for GRE or IP-IP tunnel routing.