draft-liu-teas-yang-te-topo Yang Data Model for TE Topologies draft-liu-teas-yang-te-topo Github: https://github.com/ietf-mpls-yang/te/blob/master/ietf-te-topology.yang Xufeng Liu (Ericsson) Vishnu Pavan Beeram (Juniper Networks) Igor Bryskin (ADVA Optical Networking) Tarek Saad (Cisco) Himanshu Shah (Ciena) Oscar Gonzalez De Dios (Telefonica)

TE Topology – Yang Model draft-liu-teas-yang-te-topo TE Topology – Yang Model Yang Data Model for representing and manipulating TE Topologies: Technology agnostic TE Topology building blocks Generic Node/Link attributes Information Sources Model captures overlay and underlay relationship for nodes and links Allows Hierarchical TE Topology views Time scheduling parameters Can be specified for the topology as a whole or each individual topological element Abstract TE Topologies Model facilitates the notion of “TE Topology as a Service”

TE Topology Building Blocks draft-liu-teas-yang-te-topo TE Topology Building Blocks Generic TE Link Attributes Bandwidth, Admin groups, SRLGs, Switching Capabilities, TE metric extensions etc. Generic TE Node Attributes Generic Connectivity Matrix Information Sources Each TE topological element can have multiple TE information sources (OSPF-TE, ISIS-TE, BGP-LS, User- Configured, Other) Each information source is associated with a credibility preference.

Overlay/Underlay Relationship draft-liu-teas-yang-te-topo Overlay/Underlay Relationship Model captures overlay and underlay relationship for TE nodes/links. In hierarchical TE Topologies, model allows vertical traversal of topological elements. Facilitates Hierarchical TE Topology Views

Hierarchical TE Topology Views draft-liu-teas-yang-te-topo Hierarchical TE Topology Views Topology -Blue B C A D TE-Link E-F in Topology-Blue is catered to by underlay TE-path {E’-M-P-Q-N-F’} in Topology-Red E F Topology -Red E’ M N F’ TE-Link P-Q in Topology-Red is catered to by underlay TE-path {P’-X-Q’} in Topology-Green O P Q R Topology -Green P’ Q’ V X Z W Y

Time Scheduling Attributes draft-liu-teas-yang-te-topo Time Scheduling Attributes Time Scheduling parameters can be specified for the topology as a whole or for each individual topological element. Allows the provider to present different topological views to the client at different time slots. +--rw schedules* [schedule-id] | +--rw schedule-id uint32 | +--rw start? yang:date-and-time | +--rw schedule-duration? string | +--rw repeat-interval? string

Abstract TE Topology: Topology as a Service draft-liu-teas-yang-te-topo Abstract TE Topology: Topology as a Service Model allows the provider to present the network in abstract TE terms on per client basis Model allows the client to request changes to the abstract TE Topology that is presented to it

Abstract TE Topologies – Usage Example draft-liu-teas-yang-te-topo Abstract TE Topologies – Usage Example Abstract TE Topology exported to Client Blue Abstract TE Topology exported to Client Red S3 S5 S3 M-SRLG 200 S8 S8 S9 S11 S9 S11 M-SRLG 200 Provider Network S1 S2 S3 S4 S5 C-B2 C-B1 S6 S7 S8 C-B3 C-R1 C-R2 S9 S10 S11 C-R3

Pending/Open Items Open Discussion Items: Pending Work-Items: draft-liu-teas-yang-te-topo Pending/Open Items Open Discussion Items: Relationship with “generic network topology” model Pending Work-Items: Incremental Notifications Appendix for use-cases