CR-2026-03-10: C9130AX WiFi 6 AP — Risk & Comms

Key Lessons

Lesson	Detail
Vendor limitations matter	VyOS doesn’t support Cisco DHCP Option 43. DNS discovery is the workaround.
DNS HA verification	Always verify AXFR replication to secondary DNS before relying on records.
Serial increment is critical	Zone changes without serial increment = no replication.
WiFi 6 (802.11ax) benefits	C9130AX supports 5GHz + 6GHz. All clients migrated automatically.

Lesson

Detail

Vendor limitations matter

VyOS doesn’t support Cisco DHCP Option 43. DNS discovery is the workaround.

DNS HA verification

Always verify AXFR replication to secondary DNS before relying on records.

Serial increment is critical

Zone changes without serial increment = no replication.

WiFi 6 (802.11ax) benefits

C9130AX supports 5GHz + 6GHz. All clients migrated automatically.