What is the Overlay Transport Virtualization site VLAN used for?
A. to allow multiple site AEDs to communicate with each other
B. to detect devices at the site that are not capable of OTV
C. to facilitate communications between OTV edge devices within the site
D. to allow the join interfaces at different sites to communicate
correct is A
https://www.cisco.com/c/en/us/td/docs/solutions/Enterprise/Data_Center/DCI/whitepaper/DCI3_OTV_Intro/DCI_1.html
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The concept of Authoritative edge device (AED) is introduced to avoid the situation depicted in Figure 1-22. The AED has two main tasks:
1. Forwarding Layer 2 traffic (unicast, multicast and broadcast) between the site and the overlay (and vice versa).
2. Advertising MAC reachability information to the remote edge devices.
The AED role is negotiated, on a per-VLAN basis, between all the OTV edge devices belonging to the same site (that is, characterized by the same Site ID). Prior to NX-OS release 5.2(1), OTV used a VLAN called “Site VLAN” within a site to detect and establish adjacencies with other OTV edge devices as shown in Figure 1-23. OTV used this site adjacencies as an input to determine Authoritative Edge devices for the VLANS being extended from the site.
Nope, correct answer is C.
Multiple OTV edge devices within the same site can communicate through the OTV site VLAN, among other things to elect one (and only one ) AED per site.