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East-West Traffic denotes a direction of traffic flow within a data center. Based on the most commonly deployed topology of systems within a data center, East-West traffic indicates flow of data among devices within a specific data center. The other direction of traffic flow is North-south traffic, which typically indicates data flow that either enters/leaves the data center from/to a system physically residing outside the data center.

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  • East-West Traffic denotes a direction of traffic flow within a data center. Based on the most commonly deployed topology of systems within a data center, East-West traffic indicates flow of data among devices within a specific data center. The other direction of traffic flow is North-south traffic, which typically indicates data flow that either enters/leaves the data center from/to a system physically residing outside the data center. As a result of virtualization, private cloud, converged and hyper-converged infrastructure adoption, east-west traffic volumes have increased. Today many virtual functions including virtual firewalls, load balancers and other software defined networking (SDN) perform various functions and services that previously ran on physical hardware. As these components relay data to each other, they increase traffic on the network, which can increase latency and cause network congestion.As disaggregated compute and storage becomes popular, east-west traffic volumes will increase. Traditionally, many data centers today deploy their systems using a fat-tree or CLOS topology. In this topology, servers and appliances that host applications are deployed within the racks. There is a top of the rack (ToR) switch (also called as leaf) that connects the systems within the rack as well as to other switches called Spine switches. The Spine switches connect ToRs as well as provide connectivity to other Spine switches through another layer of Switch. Applications communicate with other applications running on other systems for typical services, such as accessing an asset stored in another device, gathering results from a micro-service task(s) executed on other systems, or simply getting a status update from management software. (en)
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  • East-West Traffic denotes a direction of traffic flow within a data center. Based on the most commonly deployed topology of systems within a data center, East-West traffic indicates flow of data among devices within a specific data center. The other direction of traffic flow is North-south traffic, which typically indicates data flow that either enters/leaves the data center from/to a system physically residing outside the data center. (en)
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  • East-west traffic (en)
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