Link Flapping

When the switch initializes, the Extreme Integrated Application Hosting ports connect to the underlying Linux hypervisor. When a virtual port of connection type OVS or SR-IOV is configured on the switch, the Linux hypervisor saves this connection, and the link state of the Extreme Integrated Application Hosting port does not change. However, when a virtual port of connection type VT-d is configured on the switch, control of the Extreme Integrated Application Hosting port is passed from the Linux hypervisor to the configured Virtual Machine (VM). The Extreme Integrated Application Hosting port flaps due to this transition, and the switch reports it in the system log. The Extreme Integrated Application Hosting port flaps twice during the transition:

  1. when the Extreme Integrated Application Hosting port is removed from the Linux hypervisor.

  2. when the Extreme Integrated Application Hosting port is added to the VM.

A similar link flap sequence takes place on the Extreme Integrated Application Hosting port when the associated VM is disabled on the switch, and the control of the Extreme Integrated Application Hosting port is passed from the VM back to the Linux hypervisor.