Scenario 6 - Network with VLAN and XDAB

In this scenario, the network is divided into VLANs and an XDAB cluster is used. Two VLANs are shown; more are possible.

• XDAB is used to pass digital audio between NIONs within a cluster and therefore between VLANs.
• VLANs logically become one of two types in this scenario:
  • A master VLAN, i.e. the VLAN in which the XDAB master resides.
  • A slave VLAN, i.e. all other VLANs in the cluster.
• The Conductor on the one master VLAN must be either:
  • completely outside the XDAB cluster

    or

  • must also be the XDAB master.
• The same caveats regarding Conductor location as described in the previous scenario must be observed. But it is also important to properly locate the CobraNet Conductors for the slave VLAN (VLAN 2) to be sure that a clocking conflict is not created between XDAB and VLAN 2’s CobraNet clock.
• Regardless of whether the VLAN 1 Conductor is inside or outside of the cluster, all NIONS in the cluster that are in VLAN 2 will be getting their clock from XDAB and cannot receive their clock from an outside Conductor. This would create a clocking conflict.
• Therefore, the Conductor for VLAN 2 must be located within the XDAB cluster, as shown.