Donavan Fritz 3f6dfd3e88 bird: add source address + next hop self (v6 anycast fix) ...

Cisco IOS rejects IPv6 BGP advertisements whose next-hop is link-local-
only. BIRD2 was synthesising a link-local next-hop for kernel-learned
routes whose dev had no via gateway (our anycast /128s). Symptom: v4
anycast worked (Cisco doesn't have the same constraint for /32s), v6
anycast didn't make it past crt001.

- pkg/routing/bird/config.go: NodeBGP.LocalV6/LocalV4. Template now
  emits `local <addr> as <asn>` and `next hop self;` in the BGP
  channel for both families, mirroring Calico's `source address` +
  `next hop self` pattern.
- pkg/agent/bird.go: localAddrSameSubnet picks an interface address
  on the peer's /64 or /24 to use as source.

Co-Authored-By: Claude Sonnet 4.6 (1M context) <noreply@anthropic.com>

2026-04-25 07:45:51 -05:00

..

config_test.go

M2: netlink, IPAM/handler wiring, BIRD sidecar, CNI installer

2026-04-24 22:33:48 -05:00

config.go

bird: add source address + next hop self (v6 anycast fix)

2026-04-25 07:45:51 -05:00