This holds the specific 3-bit PCP value (0 through 7, per the 802.1p priority scale) that this rule matches against, active only when cienaCesAclRuleMatchOuterPcp is true. An admin sets this to a specific priority level to target traffic at exactly that class of service, such as the highest-priority value 7 typically reserved for network control traffic. For example, an admin building a rule to catch and drop any end-user traffic falsely marked with PCP 7 (network-control priority) would set this object to 7 and pair it with a deny action, protecting legitimate control-plane traffic's priority treatment from being diluted by spoofed markings.