OTV Multihoming
Multihoming is a native function in OTV where two or more OTV edge devices provide a LAN extension for a given site. Having more than one OTV edge device at a given site, because OTV doesn’t send spanning tree BPDUs across the overlay, can lead to an end-to-end loop.
To be able to support multihoming, and to avoid creating an end-to-end loop, an Authoritative Edge Device (AED) concept is introduced. The AED role is elected on a per-VLAN basis at a given site. OTV uses a VLAN called Site VLAN within a site to detect adjacency with other OTV edge devices. In addition to the site adjacency, OTV maintains a second adjacency named ...
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