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Author: Admin | 2025-04-28
Reference note: This post consists of some notes from the actual Cisco white paper.ContentsIntroductionA- Cisco Nexus 9300-EX Switches Architecture* Cisco Cloud Scale LSE ASIC ArchitectureI- ASIC Slice components:II- I/O components:III- Global components:B- Cisco Nexus 9300-EX Switches ArchitectureIntroductionThis post present are the next generation of fixed Cisco Nexus 9000 Series Switches. The new platform, based on the Cisco Cloud Scale ASIC, supports cost-effective cloud-scale deployments, an increased number of endpoints, and cloud services with wire-rate security and telemetry.We will start with the well known Cisco Nexus 93108-EX switch architecture.A- Cisco Nexus 9300-EX Switches ArchitectureThe Cisco Nexus 9300-EX platform switches are built with Cisco’s Cloud Scale ASIC LSE. The Cloud Scale ASICs are manufactured using 16- nanometer (nm) technology, whereas merchant silicon ASICs are manufactured using 28-nm technology. The 16-nm fabrication can place more transistors in the same size of die as that used for merchant silicon. * Cisco Cloud Scale LSE ASIC ArchitectureCisco offers three types of its Cloud Scale ASICs: Cisco ACI Spine Engine 2 (ASE2), ASE3, and LSE. Their architecture is similar, but they differ in port density, buffering capability, forwarding scalability, and some features.The LSE ASIC is a superset of ASE2 and ASE3 and supports Cisco ACI leaf switch and Fabric Extender (FEX) functions. Like the other Cloud Scale ASICs, the LSE uses a multiple-slice SOC design. The Cisco Nexus 9300-EX platform switches are built with the LSE ASIC.Each ASIC has three main components:Slice components I/O componentsGlobal componentsI- ASIC Slice components:The slices make up the switching subsystems. They
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