Lecture 19 20 21

Lecture 19 20 21 - EE 555 Spring 2009 Broadband Network...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon
EE 555 Spring 2009 Broadband Network Architectures 3 – Switches and Routers Prof. John Silvester Reference Text CL: High Performance Switches and Routers , H.J. Chao and B. Liu, Wiley Interscience, 2007. Routers and Switches • Terms are often used interchangeably Terms are often used interchangeably • Switch usually refers to local operation (decisions based on locally available (decisions based on locally available information – a lookup table for example) • Router usually refers to larger scale and incorporates a switching function as well as more sophisticated routing and other control and traffic management functions. usc-den-ee555-spring-2009 Switches and routers 2
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Router Types Router Types Border – at the border of an enterprise Border at the border of an enterprise • Edge – outward facing from a network Core – network core • Access – supports lots of slower lines usc-den-ee555-spring-2009 Switches and routers 3 Basic Architecture Interface Interface Route Route Processor* Interface Route Processor SWITCH Interface Route Processor Route Controller Management Controller *or Forwarding Engine usc-den-ee555-spring-2009 Switches and routers 4
Background image of page 2
Router – Key Components Router Key Components Data Plane (per packet processing) – Interface • Transponder or Transceiver: optical to electrical; parallel to serial (and reverse) • Framer: frame overhead processing and synchronization (for SONET or Ethernet) Route/Network Processor • Forwarding Engine: address lookup (table) and processing, packet classification, packet processing • Traffic Management: implements QoS, rate management (policing), and other special f nctions (e g fire all functions (e.g. firewall) Control Plane (slower rate processing) – Route Controller (routing updates) connection management e g MPLS connection management, e.g. MPLS, • table updates (RIP, OSPF, BGP), distribute route tables to FE’s • exception handling – Management Controller (router management functions) usc-den-ee555-spring-2009 Switches and routers 5 Typical More Distributed Router Architecture Management Route Management Controller Route Controller CPU Memory Line Card 1 ASICS Traffic Manager Framer Network Processor Transponder Transceiver Switch Fabric . . . Line Card n usc-den-ee555-spring-2009 Switches and routers 6
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Separate Data and Control Planes Management Controller Line Card 1 Line Card 2 Data Plane Control Plane Line Card n Switch Switch Route Controller usc-den-ee555-spring-2009 Switches and routers 7 Some Commercial Routers Model Capacity Central Memory * Power Cisco 7600 720 Gbps 1 GB 1 KW Cisco CRS 92 Tbps 4 GB 16.5 KW Juniper M-320 320 Gbps 2 GB 3 KW Juniper T-640 640 Gbps 2GB 6.5 KW Juniper T 640 2 GB * Plus line card buffers – say 100ms of data (at 10Gbps this is 1Gbit or 125MB input and/or output) usc-den-ee555-spring-2009 Switches and routers 8
Background image of page 4
Mult -Rack System Multi Rack System usc-den-ee555-spring-2009 Switches and routers From: High Performance Switches and Routers , H.J. Chao and B. Liu 9 Key Issues in Router Design • Packet Forwarding Performance: hundreds of
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 6
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/22/2010 for the course EE 555 taught by Professor Silvester during the Fall '08 term at USC.

Page1 / 36

Lecture 19 20 21 - EE 555 Spring 2009 Broadband Network...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online