what is otv
Overlay Transport Virtualization (OTV) is a Cisco-proprietary protocol suite that allows us to extend Layer 2 between datacenters with Layer 3 boundaries in between.TV takes advantage of ISIS as an underlying mechanism to establish ârouterâ adjacencies with everyone else in the Bridge Domain, and uses the ISIS TLV (Type/Length/Value) field to set up a âMAC Routing tableâ to know what MAC addresses can be found across which AEDâs.