February 2018
Beginner
290 pages
7h 28m
English
Content preview from Hybrid Cloud for Architects
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VXLAN
Virtual Extensible LAN (VXLAN) is an advancement of the VLAN technology itself. Like VLAN, VXLAN is a layer 2 shim, however the major improvements over VLAN are:
- Number of VXLANs: Theoretically, this has been beefed up to 16 million VXLANs in a network, thereby giving ample room for growth. However, the devices may support up to 16 or 32 thousand VXLANs. In VLAN, the theoretical maximum was 4,096 VLANs.
- VTEP: VXLAN also supports Virtual Tunnel Endpoint (VTEP), which can be used to create a layer 2 overlay network atop the layer 3 endpoints.
The VXLAN, along with its VTEP, are used in proprietary protocols such as OTV in Cisco Nexus devices to create stretched layer 2 networks across data centers.
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