1. Network Topology model draft-clemm-i2rs-yang-network- topo-00.txt Jan Medved, jmedved@cisco.comjmedved@cisco.com Nitin Bahadur, nitinb@juniper.netnitinb@juniper.net Alexander Clemm, alex@cisco.comalex@cisco.com Hariharan Ananthakrishnan, hanantha@juniper.nethanantha@juniper.net Tony Tkacik, ttkacik@cisco.comttkacik@cisco.com Robert Varga, rovarga@cisco.comrovarga@cisco.com

2. Purpose Data model for network topologies Generic topology model, extensions for specific topologies – L3 Unicast IGP, OSPF, IS-IS as part of this draft – Can be extended for other topologies Specified using YANG Applications – Data nodes capture and reconcile their understanding of network topology, propagate topology info – Network controllers represent controller network topology

3. Adoption Implementation shipping in OpenDaylight since February – Export of topology gleaned from BGP/LS – Export of LERs attached via PCEP ODL-private extension for PCEP Proposed to become one of the core ODL models

4. Next steps Re-issue the draft Split the L3-specific models into separate draft Do we need a separate information model?

5. Model structure Topology NodeLink Termination Point Links connect nodes, are terminated by termination points Topologies can refer to underlay topologies Links can refer to underlay links Nodes can refer to underlay nodes Unidirectional, point-to-point links represent non-ptp through hierarchies of nodes links

6. Model structure (contd.) Network Topology IGP Topology OSPF TopologyISIS Topology Other topologies (future) TED Generic topology model Traffic engineering data definitions, used in multiple topologies Model allows for multiple levels of refinement Additional topologies can be added at any refinement level

7. Questions?

8. Backup

9. Model structure (contd.) Topology NodeLink Termination Point IGP Topology IGP link IGP node prefix Derive IGP topology model elements Integrity rules ensure links, nodes, topology of matching type

10. Model structure (contd.) Topology NodeLink TP IGP Topology IGP link IGP node prefix OSPF topo ISIS topo ISIS link OSPF link ISIS node OSPF node Pattern recurses