Multi Layer SDN. Yatish Kumar CTO Corsa Technology

Size: px

Start display at page:

Download "Multi Layer SDN. Yatish Kumar CTO Corsa Technology"

Osborne Price
5 years ago
Views:

1 Multi Layer SDN Yatish Kumar CTO Corsa Technology

2 Protocol Independent Roles Network Layer Connectionless Layer (dst) oversubscribed ANY path Link Layer Packet Link Layer (src,dst) oversubscribed FIXED path Physical Layer TDM Link Layer Fixed bandwidth Framers OSI Stack Yatish Stack The New Dagwood Avocado Almond Butter Toast

3 Terms we are more familiar with Connectionless Layer (dst) oversubscribed ANY path Forwarding Packet Link Layer (src,dst) oversubscribed FIXED path Circuit TDM Link Layer Fixed bandwidth Framers OTN or Transparent Ethernet Yatish Stack

4 High Level Attributes We Need Reliable Connectivity x Economy from Oversubscription Managing Network Complexity Universal Reachability Economy from High Utilization

5 Transport Trends Extreme bandwidth at affordable prices 400G / 500G Superchannels 16 QAM and more 50GHz Silicon OEM DWDM modules increasingly easier for / vendors to work with

6 Multi Terabit Multi Table Multi Pipeline Internet Sale Fully Virtualized Proper SDN Hardware is AVAILABLE Multi Chassis Hierarchical QoS XC-12 XC-12

7 Where is this talk headed? Reachability Connectionless Layer Forwarding Utilization Managing Network Complexity Oversubscription Packet Link Layer Circuit TDM Link Layer OTN or Transparent Ethernet Reliable Connectivity x // Programmability and Virtualization Yatish OSI Stack Yatish s Opinion On How To Break Down the Problem

8 Ambitious Goals Connectionless Layer Forwarding Reachability Think Beyond IP Routing Utilization Managing Network Complexity Oversubscription Packet Link Layer Circuit TDM Link Layer OTN or Transparent Ethernet Reliable Connectivity x Make QoS Work Leave BFD, Protection etc.. Here // Programmability and Virtualization Yatish OSI Stack

9 Presently Everywhere 40 G 40 G 100 G 40 G

10 Route at the Edge - Switch in the Core Size router to Ingress / Egress 20 G 20 G 20 G Handle QoS and Oversubscription at 100 G

11 SDN Routing - Merge the Forwarding Boxes 20 G 20 G 100 G 20 G SDN SDN SDN SDN

12 Which Layer Does What? Is this an or problem? Reachability 20 G 20 G Utilization 100 G 20 G SDN SDN Reliable Connectivity x SDN Oversubscription SDN

13 SDN Routing Better Explained SDN Controller ebgp ebgp ebgp

14 SDN Routing Better Explained SDN Controller Routing Policy Traffic Engineering FIB Calculator ebgp ebgp ebgp

debugging ebgp ebgp ebgp / ISIS ebgp / ISIS Routing Policy Routing Policy ebgp Traffic

15 SDN Controller Peering Policy Traffic Management FIB Calculation Centralized vs. Distributed Routing Lots of Control Protocols Lots of Configuration Files Lots of distributed debugging ebgp ebgp ebgp / ISIS ebgp / ISIS Routing Policy Routing Policy ebgp Traffic Engineering ebgp / ISIS Traffic Engineering This Topic is a RatHole for another day! Routing Policy Traffic Engineering

16 Here is What Has Emerged At Geant and EsNet Quagga Service Specific SDN design. Built on a robust / substrate. ONOS LHCONE BOD / Virtualization VRFs Bridge Legacy and New Methods for Forwarding. Isolation with Virtualization. Affordable, Scalable, Flexible with QoS SDN HW Service Agnostic! Circuits with QoS. ENOS / NSI / BOD Automation Inexpensive and Reliable Transport

17 Over time. Lose the bad stuff. Keep the Good Stuff Quagga MPLS-TE / RSVP / Split Horizon / BGP Policy / ISIS / Dykstra ONOS LHCONE BOD / Virtualization VRFs X Bridge MPLS / VLAN Framing Ethernet

18 1 Virtualized SDN Service Instances. Tied together with a self healing transport layer. And QoS Engineered Circuits Final Vision

19 1 Virtualized SDN Service Instances. Tied together with a self healing transport layer. And QoS Engineered Circuits Final Vision 2 Federated Control Planes that eventually simplify and eliminate current routing protocols

20 1 Virtualized SDN Service Instances. Tied together with a self healing transport layer. And QoS Engineered Circuits Final Vision 2 Federated Control Planes that eventually simplify and eliminate current routing protocols 3 Use the PROGRAMMABLE control planes and Simple Forwarding Planes to: 1. Manage networks by programming Policy on Reachability and Sharing 2. Automate path computation and recovery at Layer 1 3. Manage all available bandwidth at Layer 2 by reasoning about Percentage of bandwidth. Not Gbits of BW at Layer 2. Leave the Gbits to Layer 1.

SDN QoS. Yatish Kumar - CTO Corsa

SDN QoS. Yatish Kumar - CTO Corsa SDN QoS Yatish Kumar - CTO Corsa QoS is a design problem Who gets how much? For how long? Why? QoS Tools Buffers Schedulers s Policers Meters Flow Control / BackPressure Quick Summary of Each Tool Meters