1. Use Cases for SF Aware Topology Models draft-bryskin-teas-use-cases-sf-aware-topo-model-01
Igor Bryskin (Huawei Technologies)
Xufeng Liu (Jabil)
James Guichard (Huawei Technologies)
Young Lee (Huawei Technologies)
Luis Miguel Contreras (Telefonika)
Danielle Ceccarelli (Eriksson)

2. Changes since IETF99 Luis and Danielle are joined as co-authors
Terminology section is added
- Network Function
- Service Function
- Service Function Chain
Figures illustrating use cases are added
On– and off-line discussions
Editorial changes

3. SF Aware Network Topology
L2x
SF1
L23
L32 N3
L3x
L21 N2
SF3
L24
L12
L34
L36
L42
L43
L1x N1
L14
L41 N4
SF5
L45
SF6
L15
L54
L63
L51
L56
L65
L5x N5
L156
L165 N6
L6x
SF1
Example: SF-aware TE topology 3

4. SFC with TE constraints
L2x
SF1
L23
L32 N3
L3x
L21 N2
SF3
L24
L12
L34
L36
L42
L43
L1x N1
L14
L41 N4
SF5
L45
SF6
L15
L54
L63
L51
L56
L65
L5x N5
L156 N6
L6x
L165
SF1

5. SFC Recovery (1) SF2 on node N1 fails SF4 SF2 SF6 SF2 L2x SF1 L23 L325
SF2 on node N1 fails

6. SFC Recovery (2)
SF4
SF2
SF6
SF2
L2x
SF1
L23
L32 N3
L3x
L21 N2
SF3
L24
L12
L34
L36
L42
L43
L1x N1
L14
L41 N4
SF5
L45
SF6
L15
L54
L63
L51
L56
L65
L5x N5
L156
L165 N6
L6x
SF1
SFC SF1-SF2-SF6 is recovered after SF2 on node N1 failed 6 6

7. SFC Recovery (3) SFC SF1-SF2-SF6 is recovered after node N1 failed SF4
L2x
SF1
L23
L32 N3
L3x
L21 N2
SF3
L24
L12
L34
L36
L42
L43
L1x N1
L14
L41 N4
SF5
L45
SF6
L15
L54
L63
L51
L56
L65
L5x N5
L156
L165 N6
L6x
SF1
SFC SF1-SF2-SF6 is recovered after node N1 failed 7 7

8. SFC load balancing Two parallel SF1-SF6 SFCs with TE constraints SF4
L2x
SF1
L21
L23
L32 N3
L3x N2
SF3
L24
L12
L34
L36
L42
L43
L1x N1
L14
L41 N4
SF5
L45
SF6
L15
L54
L63
L51
L56
L65
L5x N5
L156
L6x
L165 N6
SF1
Two parallel SF1-SF6 SFCs with TE constraints 8 8

9. Optical tunnel as TE-constrained SFC of 3R regenerators
Red trail (not regenerated) is not optically reachable,
but blue trail (twice regenerated) is 9 9 9

10. Compute Resource aware Topology
VIRTUAL SWITCH VM
Compute Node
HYPERVISOR N1 N2 N4 N3 N5 N6
L12
L21
L23
L32
L24
L42
L43
L34
L36
L63
L14
L41
L15
L51
L54
L56
L156
L65
L165
L45
L1x
L2x
L3x
L6x
L5x
VIRTUAL SWITCH VM
Compute Node
HYPERVISOR
Compute Node is attached to network WAN node. It contains VMs which can be modeled as a Service Function (SF). VM resources (instances, usage, CPU/Memory) can be modeled and integrated with network topology model to facilitate VM migration, dynamic load balancing, etc. 10

11. Next steps Solicit more feedback from WG Identify more use cases
Relate to IETF Network Slicing work