You’ve probably heard that the telecommunications industry is moving its 5G Core into Kubernetes. But what happens when a fundamental telco requirement, SCTP multihoming, meets a platform that was never designed for it?

In 5G networks, the N2 interface between gNB and AMF depends on SCTP multihoming to deliver “five nines” availability through multi path failover. However, standard Kubernetes networking, especially kube proxy and Service abstractions, is fundamentally blind to SCTP multi IP semantics. The result is multihoming silently breaks, failover degrades, and operators resort to brittle workarounds like exposing Pods directly to external networks.

This talk explains why Kubernetes fails SCTP and how to fix it. We show how LoxiLB uses eBPF to act as a stateful SCTP aware proxy, rewriting INIT and INIT ACK in real time. Combined with Multus and BGP, this enables true end to end SCTP multihoming in cloud native 5G.