VXLAN
VXLAN is a network virtualization technology that leverages existing Layer 3
infrastructures to create tenant overlay networks. VXLAN addresses the requirements of a
multi-tenant data center network infrastructure by:
- Increasing virtual network scalability to 16 million instances. This allows for
tenant VLAN (Virtual LAN) isolation whereby multiple tenants can manage their own
VLAN/VMAN and MAC address spaces.
- Adding an encapsulation that effectively hides VM MAC addresses from the physical
network that results in physical networking devices to have smaller MAC and IP table
sizes.
- Allowing for Layer 2 adjacency across IP networks by which DC network operators
protect their investment in their current infranstructure. Additionally operators
can distribute traffic loads across links efficiently using Layer 3 ECMP.
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