JNCIS-SP: Juniper Networks Certified Specialist – Service Provider Routing (2021) — Question 4

What must be configured for all IBGP speakers in an AS to have consistent routing information?

Answer options

• A. Partial mesh of EBGP sessions between EBGP speakers
• B. Default routes to the IBGP gateways
• C. Static routes to the EBGP gateways
• D. Full mesh of IBGP sessions between IBGP speakers

Correct answer: D

Explanation

A full mesh of IBGP sessions between IBGP speakers is required to ensure that all routers receive routing updates from each other, thus maintaining consistent routing information. The other options do not provide the necessary connectivity between IBGP speakers needed for accurate routing information exchange.