An appliance serial number is a unique identifier and can be used in only one instance of a ProxySG Virtual Appliance (ProxySG VA). You are receiving this error because two ProxySG VA’s in your ADN network have identical serial numbers. When an ADN manager receives a connection request from an ADN node with a duplicate serial number, the following measures are taken:
- The connection to the ProxySG VA that first established a connection with the ADN Manager is terminated. This connection is terminated to prevent a routing storm in the network. All traffic that is currently intercepted on this ProxySG VA is bypassed, since ADN is effectively disabled. No traffic will be accelerated on this ProxySG VA.
- A message recording the duplicate serial number error is written to the event log of the ProxySG VA that has been disconnected.
The health state of the ProxySG VA transitions to Critical, and the following alerts appear: License expired. All traffic is now bypassed and ADN Connection Status Disconnected.