What are two reasons to select OTV as the DCI solution to connect multisite topologies? (Choose two.)
What are two reasons to select OTV as the DCI solution to connect multisite topologies? (Choose two.)
OTV propagates host reachability without the support of traffic flooding and constrains HSRP hello messages to each data center. These features ensure efficient use of network resources and reduce the risk of unnecessary traffic affecting performance and stability across the data center interconnect.
Probably A&B. C is wrong. OTV do not extend spanning-tree. See "Where Is My Spanning-Tree Root with OTV?" on page 5 https://www.cisco.com/c/dam/en/us/products/collateral/switches/nexus-7000-series-switches/guide_c07-728315.pdf
Correct
I think A E https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/DCI/whitepaper/DCI3_OTV_Intro/DCI_1.html OTV introduces the concept of “MAC routing,” […] it is justified by the need to limit flooding of Layer 2 traffic across the transport infrastructure. The last capability introduced by OTV is to filter First Hop Redundancy Protocol (FHRP—HSRP, VRRP, and so on) messages across the logical overlay.
Why is this one not upvoted much? https://community.cisco.com/t5/data-center-documents/cisco-otv-and-fhrp-isolation/ta-p/3136485
A and E are the options of your choice
In the URL provided as reference says: "This is achieved by leveraging the same control plane protocol used for the exchange of MAC address information, without the need of extending the Spanning-Tree Protocol (STP) across the overlay". So as CHEdot commented, C is incorrect.
I believe B and E are correct. I chose E because "The last capability introduced by OTV is to filter First Hop Redundancy Protocol (FHRP—HSRP, VRRP, and so on) messages across the logical overlay."
My bad, B&E
A&E are correct.