HTCA-6600 is designed in 6U, with six CPU blades and a combination of six Ethernet NI/switch blade slots. While sharing the same CPU and memory configurations as HTCA-6200, two Intel® Xeon® E5-2600 v3/v4 CPUs and sixteen DDR4 R-DIMM sockets for each blade as stated above, HTCA-6600 comes with six front-cabling, swappable Ethernet NI/switch blades. The top 2 blade slots are reserved for switch or Ethernet NI blades, while the other four slots are solely used for Ethernet NI blades. The Ethernet NI blade comes with the same configuration as HTCA-6200, which delivers thirty-two 10GbE ports. As the higher-end model, HTCA-6600 is designed with switch blade and CPU blade redundancy. In case one of the blades is encountered with failure, the other will take all the work loads.