Redundant Networks

DDM supports redundancy only within a subnet.

Redundant media is not supported between devices in different subnets. DDM will filter subscriptions across subnets to disable redundancy on these subscriptions.

DDM assumes that the subnet architecture of secondary subnets mirrors their primary subnets. The following are explicitly not supported for 'correct' redundant operation:

• Devices in different primary subnets sharing a secondary subnet
• Devices in the same primary subnet being in different secondary subnets

In the example of a supported configuration illustrated below, there are two primary subnets (10.10.60.* and 10.10.70.* are used as example address ranges) which are served addresses by DHCP. DDM enables media routing between these subnets.

The secondary interfaces for the devices in each primary subnet are connected to isolated subnets, using Link-local for address allocation. Media routing is not supported between these subnets.