Wassim

In this article I expose my study notes on the VXLAN technology with the Nexus 9000 product family, in both NX-OS and ACI mode. What is the purpose of VXLAN? Any network engineer can tell that we have a limitation with VLANs: we can have a maximum of 4094 unique VLANs on a single layer 2 domain. And a VLAN stops at the layer 3 boundary, where routing devices take the role to transport packets from one location/datacenter to another. That means, whenever we want to apply Live Migration (or vMotion) to a workload on a datacenter X to swap it to datacenter Y will not possible. In this sense, VXLAN facilitates workload-anywhere strategy, which encompasses workload mobility and reachability. General definition of VXLAN A VXLAN is a layer 2 tunneling scheme (i.e group of virtual tunnels) formed over a layer 3 network that plays the role of (in our case) a transport network . The transport network is usually a regular IP network running static or dynamic routing protocols and is called the ...