Networking on kernelsparkshttps://kernelsparks.com/tags/networking/Recent content in Networking on kernelsparksHugoenFri, 06 Nov 2026 00:00:00 +0300Two Ports, One 200G: Cabling a DGX Spark Cluster from 2 Nodes to 8https://kernelsparks.com/posts/dgx-spark-cluster-ports-cables-topologies/Fri, 06 Nov 2026 00:00:00 +0300https://kernelsparks.com/posts/dgx-spark-cluster-ports-cables-topologies/A DGX Spark has 2 QSFP ports, each rated at 200 Gb/s, and about 200 Gb/s in total to share between them. How the ConnectX-7 rails work, what 13 tested cables taught me about choosing one, and the right wiring for 2 Sparks, 3 Sparks, and 4 or more through a switch.