Classified traffic processing

The trust level in effect on an interface determines the type of QoS information the device uses for performing QoS.

A Ruckus ICX device establishes the trust level based on the configuration of various features and whether the traffic is switched or routed. The trust level can be one of the following:
  • Ingress port default priority.
  • Static MAC address—If the packet does not matches on an ACL that defines a priority and the MAC address of the packet matches a static entry, the packet is classified with the priority of the static MAC entry.
  • Layer 2 Class of Service (CoS) value—This is the 802.1p priority value in the Ethernet frame. It can be a value from 0 through 7. The 802.1p priority is also called the Class of Service.
  • Layer 3 Differentiated Services Code Point (DSCP)—This is the value in the six most significant bits of the IP packet header 8-bit DSCP field. It can be a value from 0 through 63. These values are described in RFCs 2472 and 2475. The DSCP value is sometimes called the DiffServ value.
  • ACL keyword—An ACL can also prioritize traffic and mark it before sending it along to the next hop. This is described under "QoS options for IP ACLs" section in the Ruckus FastIron Security Configuration Guide.

Given the variety of different criteria, there are many possibilities for traffic classification within a stream of network traffic. For this reason, the priority of packets must be resolved based on which criteria takes precedence. Precedence follows the schemes illustrated in the Determining the trust level of a packet for ICX devices figure.