A system comprising: a processing resource; and a controller including a memory resource storing instructions executable by the processing resource to: determine a rate of traffic communication at each of a plurality of ingresses participating in a communication of a packet flow context based on an initial measurement of an attribute of an ingress traffic condition received from each of the plurality of ingresses and an updated measurement of the attribute of the ingress traffic condition received a period of time after the initial measurement of the attribute of the ingress traffic condition is received, determine a rate of traffic communication at each of a plurality of egresses participating in the communication of the packet flow context based on an initial measurement of an attribute of an egress traffic condition received from each of the plurality of egresses and an updated measurement of the attribute of the egress traffic condition received a period of time after the initial measurement of the attribute of the egress traffic condition is received, determine a target packet admission rate applicable to each of the plurality of ingresses from the rate of traffic communication at each of the plurality of ingresses and the rate of traffic communication at each of the plurality of egresses, and communicate the target packet admission rate to an ingress of the plurality of ingresses. a processing resource; and a controller including a memory resource storing instructions executable by the processing resource to: determine a rate of traffic communication at each of a plurality of ingresses participating in a communication of a packet flow context based on an initial measurement of an attribute of an ingress traffic condition received from each of the plurality of ingresses and an updated measurement of the attribute of the ingress traffic condition received a period of time after the initial measurement of the attribute of the ingress traffic condition is received, determine a rate of traffic communication at each of a plurality of egresses participating in the communication of the packet flow context based on an initial measurement of an attribute of an egress traffic condition received from each of the plurality of egresses and an updated measurement of the attribute of the egress traffic condition received a period of time after the initial measurement of the attribute of the egress traffic condition is received, determine a target packet admission rate applicable to each of the plurality of ingresses from the rate of traffic communication at each of the plurality of ingresses and the rate of traffic communication at each of the plurality of egresses, and communicate the target packet admission rate to an ingress of the plurality of ingresses. determine a rate of traffic communication at each of a plurality of ingresses participating in a communication of a packet flow context based on an initial measurement of an attribute of an ingress traffic condition received from each of the plurality of ingresses and an updated measurement of the attribute of the ingress traffic condition received a period of time after the initial measurement of the attribute of the ingress traffic condition is received, determine a rate of traffic communication at each of a plurality of egresses participating in the communication of the packet flow context based on an initial measurement of an attribute of an egress traffic condition received from each of the plurality of egresses and an updated measurement of the attribute of the egress traffic condition received a period of time after the initial measurement of the attribute of the egress traffic condition is received, determine a target packet admission rate applicable to each of the plurality of ingresses from the rate of traffic communication at each of the plurality of ingresses and the rate of traffic communication at each of the plurality of egresses, and communicate the target packet admission rate to an ingress of the plurality of ingresses.