Destination mode offers granular to-fabric shaping rates on a per-destination adapter card basis. While destination mode offers more flexibility and gives more control than aggregate mode, it also requires a greater understanding of network topology and flow characteristics under conditions such as node failures and link, adapter card, or port failures.
In a destination mode fabric profile, the unicast traffic and BMU traffic are always shaped separately.
For unicast traffic, individual destination rates can be configured on each adapter card. For BMU traffic, one multipoint rate sets the rate on all adapter cards. Fairness among different BMU flows is ensured by tuning the QoS queues associated with the port.