Default Behavior Aggregate (BA) Classifiers

Table 99 shows the forwarding class and packet loss priority (PLP) that are assigned by default to each well-known DSCP. Although several DSCPs map to the expedited-forwarding (ef) and assured-forwarding (af) classes, by default no resources are assigned to these forwarding classes. All af classes other than af1x are mapped to best-effort, because RFC 2597, Assured Forwarding PHB Group, prohibits a node from aggregating classes. Assignment to best-effort implies that the node does not support that class.

You can modify the default settings through configuration. For instructions, see Configuring Class of Service with DiffServ.

Table 99: Default Behavior Aggregate (BA) Classification