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

2. 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”

3. 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.

4. 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

5. 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

6. 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

7. 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

8. 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

9. 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