Safety Net

VXLAN addresses the need for overlay networks within virtualized data centers accommodating multiple tenants.

Benjamin Pfister

If high availability or load balancing is required on servers across geographically separated locations, many of these services require direct access over Layer 2. However, if the Layer 2 link, which is based on classic 802.1Q VLAN technology, is interrupted by a routed link in Layer 3, the required transparency is lost. A virtual extensible local area network (VXLAN) solves this problem by extending Layer 2 accessibility over the existing Layer 3 structure with an overlay network. Layers System administrators face the challenge of planning scalable networks while maintaining appropriate security and availability requirements. Some server systems need to be located in a redundant infrastructure on a subnet. Additionally, virtualized systems need to be capable of migration between multiple sites on the same subnet, whether in live operation or in…

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ADMIN Network & Security (Digital) - 1 Issue, September/October 2022

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