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I2RS Overlay usecase

This document outlines the implementation and benefits of the I2RS (Interface to the Routing System) overlay architecture, focusing on Edge Routers (ER) and Core Routers (CR). ERs manage data encapsulation, topology, and traffic reporting, while CRs emphasize simplified operations for fast data forwarding, reducing costs significantly. The overlay structure enhances network security and supports virtualization. Key applications include traffic analysis, path computation, and improved service agility, paving the way for efficient, scalable, and robust network management strategies.

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I2RS Overlay usecase

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  1. I2RS Overlay usecase Fangweihu BhumipKhasnabish

  2. Goals • Two types Router in the I2RS network • ER(Edge Router): Perform data encapsulation, topology and traffic report to control • CR(Core Router): Simplicity and cost down, focus only on fast data forwarding • Provides an overlay structure • Benefit: • Lower cost down for Core Routers • Improved network security • Support of network virtualization

  3. Overlay Model C A Logical tunnel Establishing IP/MPLS/OTN tunnel among ERs D B CR only fast forward the encapsulation data ER ER encapsulate /decapsulate the data based on the tunnel type D CR A CR G E ER F CR ER C B ER Physical topology

  4. Overlay Structure Application Application Traffic analysis, path compute and route download to ER and CR Application I2RSClient I2RSClient collect topology information and report to I2RSClient ER ER LSA flood and topology announcement CR CR CR

  5. Core Router (CR): high capability, and simplicity • CR node(Core Node)： • Mainly focus on fast forwarding of encapsulated data • The control plane is very simple • Topology announcement and flooding • For compatibility, Route computing may need to be performed, but this may not necessary

  6. Edge Router (ER) • The Requirement for ER: • Use Access authentication, authorization, and resource controller • Topology management • Policy management • Route and signal protocol • Tunnel management control • Traffic analysis and report • Service Management

  7. Network Virtualization (NV) • The ERs may support many services, and be complex • The Network Virtualization for ERs (control and forward elements virtualization) • Reduce ER complexity and equipment costs • Flexible and fast new services deployment • Increase scalability and reliability • Easy for function combination, achieving co-existence with hardware based network platform • Rapid Service prototyping • Service/Access agility

  8. Network Virtualization • Requirements (control and forward elements virtualization) • Tunnel gateway elements: IPSec/SSLVPN gateway • Traffic analytics: DPI, QoS measurement, SLA agent • Converged and network-wide function: AAA Server, policy control and charging platform • Security function: Firewalls, virus scanners, instruction detection and prevention systems, spam protection

  9. Overlay + Network Virtualization Structure Server FW Server NAT Server BRAS I2RS Client Server DPI Server FW Server NAT Server BRAS I2RS Client Server DPI Edge Router Edge Router Core Router/Switch Core Router/Switch Overlay network Edge Router Edge Router The Server DPI(FW, NAT) is located in the application model in the I2RS structure

  10. Next Step • Comments and feedback? • Call for WG adoption?

  11. Thank you!!!!

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