Various embodiments are a method for negotiating datapath treatment for
traffic sourced from a first communications network over an end-to-end
path in respect of a path segment provided for the traffic in a second
communications network, the path segment being requested for a first node
of the second communications network and being targeted to a second node
of the second communications node. The method comprises: for the first
node, notifying that a datapath capability for the path segment is one
for selection for the second node; communicating datapath capabilities
associated with the first node; selecting, for the second node, a
datapath capability from the datapath capabilities so communicated;
communicating the datapath capability so selected for the second node
back to the first node; and wherein the path segment is established using
a signaling protocol of the second communications network. Various
embodiments are also be implemented in a corresponding communications
node.