Escrow is a term used in many types of businesses, but to keep things simple, weâre going to limit this discussion to what escrow means in terms of real estate. Escrow can be three things, and if we take those Wikipedia items in reverse order, they might make a little more sense.
OTV is an encapsulation protocol that wraps L2 frames in IP packets in order to transport them between L2 domains. Typically this would be between remote datacenters, but it could also be within a datacenter if you needed an easy (expensive) way to extend a VLAN.
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 ârouterâ adjacencies with everyone else in the Bridge Domain, and uses the ISIS TLV (Type/Length/Value) field to set up a âMAC Routing tableâ to know what MAC addresses can be found across which AEDâs.