Direct Connect Failover with two Virtual Interfaces (VIFs)

The failover test simulates when one VIF is out of service, not if the entire DX is interrupted. A fiber cut or single device failure; as specified in the resiliency models, would require more than one physical connection.

for maximum resiliency, the documentation say:

separate connections that terminate on separate devices in more than one location

For high resiliency, the documentation say::

by using two single connections to multiple locations

Maximum resiliency requires two separate connections that terminate on two separate devices as shown in the docs.