There is provided a method performed by a first network node for enabling network congestion management in a wireless network. The method comprises the step of encapsulating and sending user packets in a tunnel to a second network node, wherein each packet comprises information related to a byte loss volume for the tunnel. The method further comprises the step of receiving congestion volume information for the tunnel from the second network node. The method also comprises either the step of applying network congestion policing for the tunnel based on the received congestion volume information, or alternatively the step of forwarding the received congestion volume information to a third network node, to enable network congestion policing for the tunnel based on the received congestion volume information.