![]() Actually, this phenomenon started even with 1G connections at servers because the 10GBASE-T 100m (or more than 10m) switch-port took so long to materialize. With Ethernet data rate progression fueled by server network connection upgrades and access switch location closer to servers via ToR or EoR configurations, the aggregation/distribution portion of the network is transitioning from copper to fiber. As they move to 10G, the majority will remain copper with either RJ45 CAT6A or SFP+ direct-attach copper (DAC) cables. ![]() SFP optical modules are used for Gigabit Ethernet connections to servers, though most of the server connections will remain copper RJ45 ones. In 2014, the majority of data center servers are still connected with 1G Ethernet, but in 2015, the majority will be 10G. However, the full implementation of this, while on the horizon, will not be realized rapidly in the interim – perhaps five to seven years, we still see healthy growth of both ToR and EoR architectures in the data center.ĭata center Ethernet server connections are currently transitioning from Gigabit Ethernet to 10G, which in turn is pushing the access, aggregation/distribution and core switches to 40G and 100G. ![]() And with SDN, the idea of top-or-rack (ToR) or end-or-row (EoR) switching architectures will become obsolete and the SDN switch controller will just be incorporated into the software. The use of blade servers will help facilitate mobility of VMs as well as transitioning into a software defined network (SDN) model. ![]() With the demand for server density comes blade servers and while they have not been adopted as quickly as anticipated, their installation rate will increase over the next five years. So now what used to be just a client-server standard three-tier network is starting to look like a HPC cluster. Now that many applications can run on one server, if that server gets overloaded, virtual machines (applications) need to move to another server quickly-four hops through the network is not quick, so network architecture is changing to accommodate the mobility of VMs. The need to change the data center network from a hierarchal one to a leaf-spine or more meshed one has arisen from the ever-increasing need for compute and storage access and the use of server virtualization.
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