Troubleshooting Cisco Data Center Infrastructure (DCIT) — Question 2

A mission-critical server is connected to site A. Connectivity to this server is lost from site B because the MAC route is missing in the OTV VDC of the Cisco Nexus
7000 in site B due to MAC aging. Which action allows the flooding of the unknown unicast MAC on the Nexus 7000 in the OTV VDC?

Answer options

• A. Use route map to statically advertise this MAC and redistribute with IS-IS.
• B. Unknown unicast flooding is not allowed.
• C. Use the otv flood mac <> command to selectively flood traffic for a given MAC.
• D. Use the otv isis bfd <> command to configure BFD protocol.

Correct answer: C

Explanation

The correct answer is C because the otv flood mac <> command is specifically designed to flood traffic for a particular MAC address, which resolves the issue of the missing MAC route. Option A suggests using a route map which does not directly address the flooding need, while option B incorrectly states that flooding is not allowed, and option D is unrelated to flooding MAC addresses.