Emulex OneConnect OCe14000-Series Manual de usuario descargar pdf (Pagina 4)

4 CONNECT | VMware vSphere 5.5 VXLAN Networking and Emulex OneConnect® OCe14000 Ethernet Adapters

CONNECT  DEPLOYMENT GUIDE

1.3 VMware VXLAN overview

VXLAN uses MAC Address-in-User Datagram Protocol (MAC-in-UDP) encapsulation whereby VMs can be deployed on any ESX host

while being decoupled from the underlying physical network. VXLAN uses a 24-bit identiﬁer allowing a single network to support up

to 16 million LAN segments surpassing the IEEE 802.1Q VLAN speciﬁcation of 4,094 VLANs. This capability can be best utilized in cloud

computing by providing complete network isolation for multiple tenants while utilizing common physical infrastructure. Figure 2 below

depicts a basic VXLAN conﬁguration with multiple VXLANs between ESX Host A and B extended across a L3 network. When a packet is

sent from a VM in host A to a VM in host B, the entire packet is encapsulated in a VXLAN header and traverses over the physical network.

When the VXLAN packet reaches ESX Host B, the VXLAN header is removed and the packet is received by the recipient VM with the Inner

MAC Destination Address (DA). A VXLAN Tunnel Endpoint (VTEP) is conﬁgured on each participating host and assigned with a unique IP

address and responsible for VXLAN data path processing, maintaining forwarding tables and encapsulation/de-encapsulation of VXLAN

packets. A VTEP consists of a vmkernel module, vmknic virtual adapter module and VXLAN port group module.

Figure 1. VXLAN packet format.

Figure 2. Basic VXLAN deployment with four virtual wires for network isolation.

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Emulex OneConnect OCe14000-Series Manual de usuario Pagina 4