Although both power and latency are considerably higher using these ports versus using optical Ethernet, as shown in the tables below the cost savings of going the copper route are considerable. Many rack-mounted computer and storage servers come equipped with dual 10GBASE-T, 10GbE RJ45 ports. The above methods are both high-performance, low-latency and relatively low power methods of ToR-Server interconnection. A 40GBASE-SR4 QSFP+ in the TOR connected by an MPO-to-4xDuplex-LC hydra cable to four 10GBASE-SR SFP+ modules equipped in servers HBAs (see: QSFP-40G-SR4 Application).The use of a 10GBASE-SR SFP+ installed in the TOR switch and a similar SFP+ installed in an appropriate Host Bus Adaptor (HBA) equipped server (see: SFP-10G-SR Application).Other application notes in this series have depicted, In less dense configurations with 2RU servers, the Cisco Nexus 9300 platform can support even more racks of servers in an MoR configuration.There are many ways of connecting a Top of Rack (ToR) leaf switch to subtending computer and storage servers in the same or adjacent equipment racks. The Cisco Nexus 93120TX can provides 10 Gigabit Ethernet connectivity to all servers across two racks, with a pair of these switches providing full redundancy. The Cisco Nexus 9300 platform can support multiple racks (or pods) of dense 1RU servers.
The Cisco Nexus 93120TX Switch is a 2RU switch that supports 2.4 Tbps of bandwidth and over 1500 mpps across 96 fixed 1/10G BASE-T ports and 6 fixed 40-Gbps QSFP ports. The Cisco Nexus 9300 platform switches are high-density, nonblocking, low-power-consuming switches designed for ToR, MoR, and end-of-row (EoR) deployment in enterprise data centers, service provider facilities, and large virtualized and cloud computing environments. Application workloads are deployed across a mix of virtualized and nonvirtualized server and storage infrastructure, requiring a network infrastructure that provides consistent connectivity, security, and visibility across a range of bare-metal, virtualized, and cloud computing environments: Organizations everywhere recognize that changing application environments are creating new demands for the IT infrastructure that supports them.
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