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Topology Detection and Automatic Configuration in I-MPLS-based Networks

Kind of work:
Student research project
Dipl.-Ing. René Böringer
Carsten Rohn
Topology Detection is a NS2 (Network Simulator 2) module for automatically detecting the topology of an I-MPLS based mobile network. I-MPLS is a QoS-aware micro-mobility solution. It is transparent to mobile nodes and their home networks. It uses lightweight Label Switched Paths (LSPs) to tunnel the user traffic through its domain. RSVP-TE is used as signalling protocol. Like the I-MPLS module, the Topology Detection module is also based on RSVP-TE. An additional RSVP-TE Object has been introduced. It is piggybacked on Hello Messages exchanged between certain I-MPLS-enabled nodes and carries information about the topology of the I-MPLS domain. This data is used to configure or adapt the destinations of LSPs on each node and thus to create logical LSP trees. Benefits of the Topology Detection module are, that an I-MPLS network automatically detects topology changes, for example when it is been expanded or adapted to networking needs, even link and node failures can be automatically bypassed. The Topology Detection module avoids the need for specifying the logical LSP topology manually when using the I-MPLS module.