Huawei Certified ICT Professional – Data Center Network (HCIP-DCN) — Question 17

Which of the following statements regarding the MED value in BGP are true? (Choose all that apply.)

Answer options

• A. According to BGP route selection rules, the MED value has a lower priority than AS Path, Preferred-Value, Local-Preference, and Origin.
• B. The default MED value of BGP routes is 0.
• C. By default, BGP can compare the MED values of routes from different ASs.
• D. By default, if there is no MED value in routes, the value 0 is used. If the bestroute med-none-as-maximum command is configured, the maximum MED value 4294967295 is used.

Correct answer: A, B, D

Explanation

Option A is correct because BGP route selection prioritizes AS Path, Preferred-Value, Local-Preference, and Origin over MED. Option B is also correct as the default value for MED in BGP is indeed 0. Option D is accurate because when no MED value is present, the default is 0 unless specified otherwise with the command. Option C is incorrect since BGP does not compare MED values from different ASs by default.