QUIC L3 Roadmap

Status: Deprecated

Last reviewed: 2026-06-23

Outcome

The standalone QUIC L3 product workflow has been retired. The /api/l3-networks REST surface, frontend page, backend replay path, node port projection, and legacy L3 database tables were removed after SD-WAN underlay profiles became the supported transport-session model.

Migration 064_drop_legacy_l3_product.sql drops the old l3_networks, l3_endpoints, l3_routes, l3_key_material, and l3_key_epochs tables and removes the old node_links.l3_network_id projection.

Preserved Foundations

The reusable dataplane foundations remain intentionally preserved:

• TUN I/O and packet batching.
• Linux VNET/offload, GSO, and GRO work.
• Userspace WireGuard via BoringTun.
• QUIC DATAGRAM transport foundations.
• Generic IP/TUN transport config messages used by SD-WAN and future work.

Future transport work should build on the SD-WAN underlay profile model instead of reintroducing a standalone L3 product surface.