Policers are not created on a SAP or subscriber or multiservice site context until at least one forwarding class has been mapped to the policer. Creating a policer within a QoS policy does not cause policers to be created on the SAPs or subscribers or multiservice sites where the policy is applied.
SAP QoS policy applicability and policy policer forwarding class mappings are dependent on policer resource availability. Attempting to map the first forwarding class to a policer causes the policer to be created on the SAPs or subscribers or multiservice site where the policy is applied. If the forwarding plane where the SAP or subscriber or multiservice site exists either does not support policers or has insufficient resources to create the policer for the object, the forwarding class mapping fails.
When a forwarding class is successfully mapped to a policer within the policy, attempting to apply the policy to a SAP or a subscriber or multiservice site where the policer cannot be created either because of a lack of policer support or insufficient policer resources fail.
Policing is supported only on Ethernet SAPs or Ethernet-based subscribers. Policing is also only supported on FlexPath2-based systems or IOMs with the exception of CCAG SAPs or subscribers. This feature applies to the 7450 ESS and 7750 SR only.