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Network Functions Virtualization (NFV) is now accepted in large production networks for agile introduction of various Network Functions (NFs). A service chaining technology that dynamically links multiple NFs over the entire network is a heart of the NFV concept. However, virtualizing NF-dedicated hardwares as virtual machines on IA servers brings performance problems, such as lower throughput, longer...
Overlay-based network virtualization has been getting attention to realize multi-tenant datacenters. But the multi-tenant property makes broadcast/multicast communications on virtual networks difficult. In this paper, we propose TE-Cast (Topology Embedded xCast) that supports generic broadcast/multicast communications on virtual networks. Unlike existing similar methods, TE-Cast can reduce traffic...
An Edge-Overlay model constructing virtual networks using both virtual switches and IP tunnels is promising in cloud datacenter networks. But software-implemented virtual switches can cause performance problems because the packet processing load is concentrated on a particular CPU core. Although multi queue functions like Receive Side Scaling (RSS) can distribute the load onto multiple CPU cores,...
Network virtualization is an essential technology for cloud datacenters that provide multi-tenancy services. Cutting-edge SDN-enabled datacenters have introduced an edge-overlay (distributed tunneling) model to construct virtual tenant networks. The edge-overlay model generally uses L2-in-L3 tunneling protocols, and VXLAN is a representative of such protocols. However, the tunneling-based edge-overlay...
In current SDN paradigm, an edge-overlay (distributed tunneling) model using L2-in-L3 tunneling protocols, such as VXLAN, has attracted attentions for multi-tenant data center networks. The edge-overlay model can establish rapid-deployment of virtual networks onto existing traditional network facilities, ensure flexible IP/MAC address allocation to VMs, and extend the number of virtual networks regardless...
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