Data center network must achieve lower cost and high utilization by the ability to assign any server to any service. These are not satisfied in the current design because of:
· It doesn't provide uniform capacity between the connected servers due to high cost of equipments
· Traffic of one service affects other services
· Forwarding in the network depends on IP address and dividing the servers between the VLAN. But this doesn't support the VM migration and reassigning the servers to the services.
This paper presents the network architecture VL2 with low cost switch connected into a Clos topology, to achieve the goals of data center network by avoiding the three mentioned problems.
· It adopts VLB to spread the traffic across all the available paths randomly such that uniform capacity and performance isolation can be achieved
· It uses OSPF protocol to calculate the forwarding table for the switches.
· It uses flat addressing scheme. IP address of the servers are used as the names and shim layer in the server is used to find the location of the destination from a defined directory system
The architecture was evaluated with TCP flow only. The paper states that VL2’s implementation of VLB splits the flows evenly and achieves high TCP fairness.
· It doesn't provide uniform capacity between the connected servers due to high cost of equipments
· Traffic of one service affects other services
· Forwarding in the network depends on IP address and dividing the servers between the VLAN. But this doesn't support the VM migration and reassigning the servers to the services.
This paper presents the network architecture VL2 with low cost switch connected into a Clos topology, to achieve the goals of data center network by avoiding the three mentioned problems.
· It adopts VLB to spread the traffic across all the available paths randomly such that uniform capacity and performance isolation can be achieved
· It uses OSPF protocol to calculate the forwarding table for the switches.
· It uses flat addressing scheme. IP address of the servers are used as the names and shim layer in the server is used to find the location of the destination from a defined directory system
The architecture was evaluated with TCP flow only. The paper states that VL2’s implementation of VLB splits the flows evenly and achieves high TCP fairness.
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