Firewall > QoS Mapping
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SonicOS Enhanced 4.0 Administrator Guide
configure BWM and QoS (i.e. layer 2 and/or layer 3 marking) settings on a single Access
Rule. This allows those external systems to benefit from the classification performed on the
SonicWALL even after it has already shaped the traffic.
BWM configurations begin by enabling BWM on the relevant WAN interface, and declaring the
interface’s available bandwidth in Kbps (Kilobits per second). This is performed from the
Network > Interfaces page by selecting the Configure icon for the WAN interface, and
navigating to the Advanced tab:
Egress and Ingress BWM can be enabled jointly or separately on WAN interfaces. Different
bandwidth values may be entered for outbound and inbound bandwidth to support asymmetric
links. Link rates up to 100,000 Kbps (100Mbit) may be declared on Fast Ethernet interface,
while Gigabit Ethernet interfaces will support link rates up to 1,000,000 (Gigabit). The speed
declared should reflect the actual bandwidth available for the link. Oversubscribing the link (i.e.
declaring a value greater than the available bandwidth) is not recommended.
Note Once BWM has been enabled on an interface, and a link speed has been defined, traffic
traversing that link will be throttled—both inbound and outbound—to the declared values,
even if no Access Rules are configured with BWM settings.