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SFC DC Use Cases draft-kumar-sfc-dc-use-cases IETF 89, London Mudassir Tufail Citi Surendra Kumar Cesar Obediente Cisco Systems, Inc.

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Presentation on theme: "SFC DC Use Cases draft-kumar-sfc-dc-use-cases IETF 89, London Mudassir Tufail Citi Surendra Kumar Cesar Obediente Cisco Systems, Inc."— Presentation transcript:

1 SFC DC Use Cases draft-kumar-sfc-dc-use-cases IETF 89, London Mudassir Tufail Citi Surendra Kumar Cesar Obediente Cisco Systems, Inc.

2 Objective Provide requirements for evolving SFC architecture in datacenters Demonstrate via general DC use cases, the need for an SFC architecture that – Supports hybrid datacenters – Frees SF deployment from topology – Enables end-to-end metadata passing thru SFC – Enables flexible multi-tenancy models – Allows for building composite SFCs from sub SFCs – Supports SF/C capacity scale-out IETF 89, London | SFC DC Use Cases2Mar 03, 2014

3 Traffic Types & Topology Emerging DCs are designed for scale, performance and resilience North-South traffic – Branch Office, Remote Worker – Tenant East-West traffic - predominant traffic! – Three-tier: Web, App, DB – External storage access, VM migration Mobile (Gi-LAN) – Subscriber IETF 89, London | SFC DC Use Cases3Mar 03, 2014

4 Service Nodes/Functions Emerging Service Functions on commodity hardware & virtual form factor Physical vs. Virtual Service Nodes Service Nodes vs. Service Functions – FW: ACL, Inspection, VPN, NAT, … SN Instances vs. SF Instances – vs. Inspection5 Build SFCs with static or dynamic selection – Need SF-type1 from FW-type3: resolve dynamically – Need SF-type1 from FW-type3-instance-pool – Need IETF 89, London | SFC DC Use Cases4Mar 03, 2014

5 Typical Service Function Chains Share the same service functions across different service chains Access SFCs – Service traffic entering/exiting DC – One per tenant Application SFCs – Service traffic destined to Apps – Many per tenant Need a combination of SFCs – App SFCs alone for north-south IETF 89, London | SFC DC Use Cases5Mar 03, 2014 RTR WOC eFW MON sFW ADC MON aFW ADC MON aFW ADC MON aFW WL webappdb

6 Traditional Method Inadequacies Static, rigid, complex methodologies can’t serve dynamic environments VLAN stitching is no longer a Panacea PBR does not help either Source NAT need not be a requirement Capacity scaling is non existent/complex Tenant ID cannot be tied to topology Absolutely no metadata capability Mixing virtual and physical SFs is problematic IETF 89, London | SFC DC Use Cases6Mar 03, 2014

7 Next Steps Adoption of this draft … Authors would like to – Solicit feedback/comments – Add more use cases – See the requirements become architecture guides – Request a WG doc for DC Use Cases IETF 89, London | SFC DC Use Cases7Mar 03, 2014


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