Telefonaktiebolaget Lm Ericsson (publ)

Gianluca Lombardi

Daniele Ceccarelli

Diego Caviglia

Methods for segment routing in a software-defined networking (SDN) system are disclosed. In one embodiment, a method includes receiving a plurality of values of maximum segment identifier (SID) depths, each from one network element of the SDN system, and identifying a path for a packet to transmit through a plurality of network elements, where a plurality of SIDs corresponding to the plurality of network elements is ordered to represent the path. The method further includes splitting the path into a plurality of sub-paths based on the values of the maximum SID depths of the plurality of network elements, where each network element, for the path, is allocated to process a number of ordered SIDs, and where the number is within the network element's maximum SID depth, and causing packet forwarding of the packet along the plurality of sub-paths based on SIDs allocated to the network elements.

Segment routing based on maximum segment identifier depth

A method in a controller node for performing segment routing in a non-packet data network comprising a plurality of nodes, comprises receiving information relating to the topology of the non-packet data network connecting the plurality of nodes, the non-packet data network forming a data plane network. The method comprises computing a segment routing path to be taken for non-packet traffic data through the data plane network, wherein the segment routing path is computed using segment identifiers, SIDs, relating to a data communication network, DCN, coupled to the plurality of nodes. The method comprises sending the computed segment routing path to an ingress node of the data plane network.

Apparatus and method for segment routing

Methods for automatically discovering links between a first node of a first operating domain and a second node of a second operating domain of a communication network are disclosed. The methods may be implemented at the first node, the second node, or a control node. The first and second nodes communicate in-band control messages. These messages are encoded using a size of the packets of the control messages, and provide information about the first node and a first interface used by the first node for sending the control messages. The first and second nodes also communicate link messages with the control node. The link messages comprise information received in the in-band control messages and information about a second interface used by the second node for receiving the in-band control messages.

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Stockholm, Sweden

Gianluca Lombardi