Recently, there were discussions going around about Cisco’s new datacenter technology – Overlay Transport Virtualization (OTV), implemented in Nexus 7k data-center switches (limited demo deployments only). The purpose of this technology is connecting separated data-center islands over a convenient packet switched network. It is said that OTV is a better solution compared to well-known VPLS, or any other Layer 2 VPN technology. In this post we are going to give a brief comparison of two technologies and see what benefits OTV may actually bring to data-centers.
We are going to give a rather condensed overview of VPLS functionality here, just to have a baseline to compare OTV with. A reader is assumed to have solid understanding or MPLS and Layer 2 VPNs, as technology fundamentals are not described here.
Tags: 802.1aq, ccie, otv, overlay transport virtualization, trill, vpls
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