Heinekin⁈ Heinekin⁈ PBR! Panmnesia presented a CXL controller+switch supporting port-based routing at ICSA 2026

The switch’s defining feature is support for Port-Based Routing (PBR), which forwards data using an identifier (port ID) assigned to each device. Hierarchy-Based Routing (HBR)—used in PCIe and early CXL—can connect devices only in a hierarchy, or tree. PBR removes that constraint, letting devices be wired into any topology. The resulting mesh of interconnections resembles woven cloth, which is where the term “fabric” comes from.

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