BWM is controlled by the SonicWall Security Appliance on ingress and egress traffic. It allows network administrators to guarantee minimum bandwidth and prioritize traffic based on access rules created in the Firewall > Access Rules page. By controlling the amount of bandwidth to an application or user, the network administrator can prevent a small number of applications or users from consuming all available bandwidth. Balancing the bandwidth allocated to different network traffic and then assigning priorities to traffic improves network performance. The SonicOS provides eight priority queues (0 – 7 or Realtime – Lowest).
Three types of bandwidth management are available:
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When Global bandwidth management is enabled on an interface, all traffic to and from that interface is bandwidth managed.
If the bandwidth management type is None, and there are three traffic types that are using an interface, and the link capacity of the interface is 100 Mbps, the cumulative capacity for all three types of traffic is 100 Mbps.
If the bandwidth management type is changed from None to Global, and the available ingress and egress traffic is configured at 10 Mbps, then by default, all three traffic types are sent to the medium priority queue.
The medium priority queue, by default, has a guaranteed bandwidth of 50 percent and a maximum bandwidth of 100 percent. If no Global bandwidth management policies are configured, the cumulative link capacity for each traffic type is 10 Mbps.
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