4RF Aprisa SR+, User Manual

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Managing the Radio | 211
Aprisa SR+ User Manual 1.11.1
QoS > Traffic Classification
These settings provide multiple traffic classification profiles based on classification rules. Profiles for a
specific traffic type, protocol or application can be assigned to a particular VLAN and CoS / priority in bridge
mode or to CoS / priority in router mode to provide the appropriate QoS treatment.
For example, SCADA traffic, management traffic, FTP traffic, can each have its own profile build with a set
of classification rules. A profile can be build using multiple classification rules based on ports, Ethernet, IP,
TCP / UDP headers fields (i.e. L1/2/3/4 header fields) such as: Ethernet port #1, VLAN ID, VLAN priority, IP
DSCP Priority, MAC/IP address, TCP / UDP port fields to identify and classify the specific traffic type. When
an ingress packet matches the profile L2/3/4 header fields settings, the packet is assigned to a particular
VLAN and CoS / priority in bridge mode or to CoS / priority in router mode to provide the appropriate QoS
treatment.
The radio supports four CoS / priority queues: very high, high, medium and low. These queues are connected
to a strict priority scheduler which dispatches packets from the queues out to the egress port by always
serving first the ‘very high’ priority queue, whenever there is a packet in this queue. When the highest
priority queue empties, the scheduler will serve the next high priority queues and so on. So, when SCADA
traffic is assigned to a ‘Very high’ priority, it will always be served first and send over-the-air (OTA)
whenever SCADA traffic enters to the radio, giving it the highest priority over other traffic types.
These settings are different for Bridge Mode and Router Mode.