QoS priorities-to-traffic assignment

By default, all traffic is in the best-effort queue (qosp0) and is honored on tagged ports on all FastIron switches.

You can assign traffic to a higher queue based on the following:
  • Incoming port (sometimes called the ingress port)
  • Static MAC entry

When you change the priority, you specify a number from 0 through 7. The priority number specifies the IEEE 802.1 equivalent to one of the eight QoS queues on Ruckus devices. The numbers correspond to the queues as shown in the QoS queues table.

Although it is possible for a packet to qualify for an adjusted QoS priority based on more than one of the criteria, the system always gives a packet the highest priority for which it qualifies. Thus, if a packet is entitled to the premium queue because of its IP source and destination addresses, but is entitled only to the high queue because of its incoming port, the system places the packet in the premium queue on the outgoing port.

Buffer allocation and threshold for QoS queues

By default, Ruckus FastIron software allocates a certain number of buffers to the outbound transport queue for each port based on QoS priority. The buffers control the total number of packets permitted in the outbound queue for the port. If desired, you can increase or decrease the maximum number of outbound transmit buffers allocated to all QoS queues, or to specific QoS queues on a port or group of ports. For more information, refer to the Ruckus FastIron Layer 2 Switching Configuration Guide.