[bug-n1wxwkrtcnds] add pod link-local NUD source

Co-Authored-By: Codex (GPT-5) <noreply@openai.com>
2026-08-26 18:44:19 -05:00
parent 6b8ebd0aed
commit 5df592e2d1
4 changed files with 51 additions and 4 deletions
@@ -70,9 +70,10 @@ both the kernel and BGP within one reconcile cycle (sub-second).
 NIC ↔ upstream router. No conntrack, no SNAT, no encapsulation.

 For IPv6 the host side of every veth carries the deterministic link-local
-gateway `fe80::1`, so every pod can use a fixed default route. For IPv4
-the host side answers ARP for `169.254.1.1`, providing the same fixed
-default route in v4.
+gateway `fe80::1`, and the isolated pod side carries `fe80::2` for neighbor
+discovery. Every IPv6 pod can use a fixed default route without depending on
+its global `/128` for gateway resolution. For IPv4 the host side answers ARP
+for `169.254.1.1`, providing the same fixed default route in v4.

 ## Requirements