[FAQ-E] - Functionality During Cloud Outage – What Still Works When Nebula is Temporarily Unreachable

This section covers popular questions about device and network functionality during a loss of cloud connectivity, such as VPN and WiFi authentication.

❓ Will SD-VPN and 802.1X still work if the Nebula platform is unreachable?

Admins often worry about service continuity during temporary disconnections.
Answer:

• SD-VPN: Existing VPN tunnels stay active. New tunnels requiring updated configs may fail until cloud sync is restored.
• 802.1X Authentication:
  • With external RADIUS, authentication continues as usual.
  • With Nebula Cloud Authentication, clients will not be able to authenticate during a disconnection.