Cisco ACI integration supports physical firewalls divided
into contexts that are managed by ACI as individual firewalls. On
the firewall, these contexts are the virtual systems (vsys) on the
firewalls and each firewall is licensed to support a certain number
of vsys instances. When deploying a multi-vsys firewall in ACI,
you must configure a chassis manager in the tenant and assign it
to the firewall service.