“VXLAN, submitted to IETF in the Fall of 2011 and talked up at last year’s VMWorld, is a protocol for routing Layer 2 traffic over Layer 3 networks, with the goal of either expanding the available VLAN address space, or supporting inter-data center VM mobility, depending on who you ask. — Beth Pariseau
Today’s WhatIs.com Word of the Day is VXLAN (virtual extensible LAN), a protocol backed by Cisco, Citrix, Red Hat and VMware to make clouds more scalable while still isolating apps and tenants. Cisco is pushing the protocol’s scalability — it will allow up to 16 million virtual network IDs to be recognized at the same time, as compared to regular old VLANs’ measily 4,096 IDs. VMware is pushing the protocol’s potential to knock down VM migration boundaries.