In one embodiment, a non-transitory computer-readable media is provided for storing instructions, that when executed by one or more processors of a topology node, cause the topology node to: identify a first sequence of identifiers for data routing in a label switching network from a first node in the label switching network; identify a second sequence of identifiers for data routing in the label switching network from a second node in the label switching network; identify a policy for use in constraining data routing from the first node to a third node; include the first sequence of identifiers and the second sequence of identifiers in a third sequence of identifiers that reflects the policy such that data routing is constrained from the first node to the third node via a plurality of network paths that each include at least one node in the label switching network; and provide path information that identifies the third sequence of identifiers, for constraining data routing, according to the policy, to the third node via the second node.