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Changes between Version 8 and Version 9 of Architecture/Network

-              v8
+              v9
 === Data Plane ===
 There exist two parallel data plane networks that are available to experimenters. The data plane networks are interconnected with Dell Z9100-ON switches providing up to 100G connectivity between devices. The switches are built on the Broadcom Tomahawk chipset and support Openflow 1.3 as well as ONIE. The data planes are meant for latency and bandwidth sensitive experiment traffic where performance is intended to be deterministic.
+=== User facing network architecture ===
+[[Image(COSMOS_logical_net.png, 900px, align=right)]]
+All radio devices and servers are connected to the control and data logical networks, described above.
+The data network is further connected to the optical underlay. By making requests to the appropriate service, users can configure logical connections to use a particular path across both ethernet switches and and the underlying optical fabric.
+==== Locality within the network ====
+While all devices within the network may be connected, there are bandwidth and latency considerations.
+For convenience, devices within the same physical location / topology have matching suffixes.
+For example, sdr1-s1-lg1 and sdr2-s1-lg1 share the same next hop switches for their data planes, as do srv1-lg1 and srv2-lg1.
+Explanation of suffixes is at [wiki:naming names of things]
 === Isolation and infrastructure
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