When table-based classification is used from the SAP ingress resource pool, CAM resources are used to match the FC and the traffic type (unicast, broadcast, multicast, and unknown) and to assign a meter to the FC. The maximum number of DSCP entries required is 36 entries [8 FCs * 4 traffic types + 1 default FC * 4 traffic types). The maximum number of CAM resources required is 32, which assumes the use of VPLS service with one meter per traffic type, regardless of the number of IP DSCP classification entries. In other words, even if 64 IP DSCP values are matched, only 32 classification resources in the SAP ingress CAM resource pool are needed. For Epipe services, the number of entries is reduced to nine (8 FCs + 1 default FC) since all traffic is treated as unicast.
To allocate resources to meters for a SAP ingress QoS policy that is using table-based DSCP classification, use the ip-dscp-port-if-match-enable num-resources command, found under the configure> system> resource-profile> ingress-internal-tcam> qos-sap-ingress-resource context. The command supports up to 10 resources (meters).
Use the following syntax to allocate resources to meters for table-based classification.
configure> system> resource-profile>
ingress-internal-tcam>
qos-sap-ingress-resource>
ip-dscp-port-if-match-enable num-resources
The following example shows the command usage to allocate resources to meters for table-based classification.
configure> system> resource-profile>
ingress-internal-tcam>
qos-sap-ingress-resource>
ip-dscp-port-if-match-enable 5