Technical analysis and engineering reference.
Radiation-hardened spaceborne microprocessors feature limited on-chip memory compared to terrestrial datacenter switches. Maintaining routing tables with hundreds of thousands of dynamic IP routes inside radiation-tolerant SRAM is expensive and prone to single-event upsets. Segment Routing over IPv6 (SRv6) solves this by placing the forwarding instruction list inside the packet itself.
Ingress ground stations or primary satellite gateways encode the full orbital trajectory path: - Ground ingress encapsulates customer payloads in an IPv6 header containing an ordered list of 128-bit Segment Identifiers (SIDs). - Intermediate satellite routers inspect only the active SID, forward the frame to the specified optical laser terminal, and increment the pointer. - Zero state updates required across transit satellites.
SRv6 allows financial institutions and multinational corporations to enforce strict deterministic latency paths through the vacuum of space, cutting London-to-Tokyo round-trip times by up to 40% compared to terrestrial undersea fiber cables.