T Computer Networks: Routing Lectures. c Janne Lindqvist 1/59

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "T Computer Networks: Routing Lectures. c Janne Lindqvist 1/59"

Transcription

1 T Computer Networks, Autumn /59 T Computer Networks: Routing Lectures c Janne Lindqvist 1/59

2 T Computer Networks, Autumn /59 Goals of the Set of Lectures The big picture Routing protocols distance vector (RIP) link state (OSPF) path vector (BGP) multicast Routing algorithms c Janne Lindqvist 2/59

3 T Computer Networks, Autumn /59 Intuition Common analogy: the postal service But Internet routing is not quite like the postal service What were the roles of an IP address? c Janne Lindqvist 3/59

4 T Computer Networks, Autumn /59 Review direct delivery vs. indirect delivery routing table static routing vs. dynamic routing autonomous system (AS) subnet addressing Classless Inter-Domain Routing (CIDR) c Janne Lindqvist 4/59

5 T Computer Networks, Autumn /59 Routing Protocols Interior Gateway Protocols (IGP) vs. Exterior Gateway Protocols (EGP) distance vector vs. link state vs. path vector c Janne Lindqvist 5/59

6 T Computer Networks, Autumn /59 Routing Protocols routing protocols transmit routing information between routers routing protocols DO NOT forward/route packets c Janne Lindqvist 6/59

7 T Computer Networks, Autumn /59 Bellman-Ford Algorithm Bellman-Ford algorithm, single-source shortest path distributed Bellman-Ford algorithm, all-pairs shortest path On a Routing Problem - Richard Bellman, Quarterly of Applied Mathematics, Volume XVI, 1958 c Janne Lindqvist 7/59

8 T Computer Networks, Autumn /59 Bellman-Ford Algorithm 1/3 If a node is in the shortest path between A and B, then the path from the node to A must be the shortest path and the path from the node to B must also be the shortest path. D j current estimate of the minimum cost from node j to the destination node C ij link cost from node i to node j C ii = 0 C ik = if nodes i and k are not directly connected c Janne Lindqvist 8/59

9 T Computer Networks, Autumn /59 Bellman-Ford Algorithm 2/3 1. Initialization D i =, i d D d = 0 2. Updating: For each i d, D i = min j {C ij + D j }, j i Repeat step 2 until no more changes occur in the iteration. c Janne Lindqvist 9/59

10 T Computer Networks, Autumn /59 Bellman-Ford Algorithm 3/3 Good news travel quickly, bad news travel slowly. Count to Infinity problem c Janne Lindqvist 10/59

11 T Computer Networks, Autumn /59 Cost Examples 1/capacity packet delay congestion c Janne Lindqvist 11/59

12 T Computer Networks, Autumn /59 Routing Information Protocol 1/3 RIP-1 RFC 1058, June 1988 RIP-2 RFC 2453, November 1998 (subnets etc) According to Huitema Routing in the Internet, 2nd edition, the most widely used routing protocol in the Internet. c Janne Lindqvist 12/59

13 T Computer Networks, Autumn /59 RIP 2/3 uses UDP metric: hop two message types: request and response infinity is 16 split horizon and poisoned reverse triggered updates c Janne Lindqvist 13/59

14 T Computer Networks, Autumn /59 RIP 3/3 split horizon: minimum cost to a given destination is not sent to a neighbor if the neighbor is the next node along the shortest path split horizon with poisoned reverse: minimum cost to a given destination is set to infinity if the neighbor is the next node along the shortest path c Janne Lindqvist 14/59

15 T Computer Networks, Autumn /59 Next Link state routing Routing security Alternatives to packet routing Summary c Janne Lindqvist 15/59

16 T Computer Networks, Autumn /59 Routing Protocols Interior Gateway Protocols (IGP) vs. Exterior Gateway Protocols (EGP) distance vector vs. link state vs. path vector c Janne Lindqvist 16/59

17 T Computer Networks, Autumn /59 Link State Routing According to Tanenbaum, link state protocols: 1. discover neighbors and learn their network addresses 2. measure delay or cost (metric) to each neighbor 3. send the learned data to all other routers 4. compute shortest path to every other router c Janne Lindqvist 17/59

18 T Computer Networks, Autumn /59 Neighbor Discovery HELLO packet to each point-to-point line (neighbors) reply to HELLO with a globally unique name a broadcast network (LAN) is considered as a node c Janne Lindqvist 18/59

19 T Computer Networks, Autumn /59 Measuring the Link Cost ECHO packet reply to ECHO immediately delay: count round-trip time and divide it by two or delay: the above several times and count the average c Janne Lindqvist 19/59

20 T Computer Networks, Autumn /59 Sending the Data Packets 1/2 The learned data is sent as packets consisting: identity of the sender sequence number age list of neighbors Why? How to ensure delivery to all routers? c Janne Lindqvist 20/59

21 T Computer Networks, Autumn /59 Sending the Data Packets 2/3 Flooding distribution algorithm sequence number is incremented for every packet (source router, sequence number) pairs are tracked when a new link state protocol packet arrives if new, FORWARD except to the link it arrived if duplicate, DISCARD if old, DISCARD or if old, FORWARD to the router sending old packets c Janne Lindqvist 21/59

22 T Computer Networks, Autumn /59 Sending the Data Packets 3/3 Flooding distribution algorithm problems router crashes: what is my sequence number? sequence number corruption solution: Age c Janne Lindqvist 22/59

23 T Computer Networks, Autumn /59 Counting the Shortest Path Dijkstra s algorithm: single-source shortest path not distributed! c Janne Lindqvist 23/59

24 T Computer Networks, Autumn /59 Interior Gateway Link State Protocol OSPF - Open Shortest Path First silly name, almost all protocols try to find the shortest path complex, many books only about OSPF c Janne Lindqvist 24/59

25 T Computer Networks, Autumn /59 Summary What are the fundamental differences between: distance vector routing link state routing? distributed computation vs. centralized computation! c Janne Lindqvist 25/59

26 T Computer Networks, Autumn /59 Routing Is Not Always Necessary bridges (comeback in Wireless LAN) Virtual LAN (VLAN) Which to choose? The domain of network engineering. c Janne Lindqvist 26/59

27 T Computer Networks, Autumn /59 Routing Security 1/2 RIP-1 RFC 1058, June 1988 RIP-2 RFC 2453, November 1998 (subnets, authentication etc) c Janne Lindqvist 27/59

28 T Computer Networks, Autumn /59 Routing Security 2/2 What does authentication solve? Denial of Service (DoS)? Address Resolution Protocol (ARP) spoof? Medium Access Control (MAC) spoof? c Janne Lindqvist 28/59

29 T Computer Networks, Autumn /59 What did we cover? Distance vector routing Distributed Bellman-Ford algorithm Link state routing Routing security Alternatives to packet routing c Janne Lindqvist 29/59

30 T Computer Networks, Autumn /59 What did we not cover? Multicast routing Routing in ad hoc networks Quality of Service Routing MPLS c Janne Lindqvist 30/59

31 T Computer Networks, Autumn /59 Summary of Part I If you don t remember anything else: routing protocols exchange information about networks routing protocols do not forward packets c Janne Lindqvist 31/59

32 T Computer Networks, Autumn /59 Goals of the Set of Lectures The big picture Routing protocols distance vector (RIP) link state (OSPF) path vector (BGP) Routing algorithms c Janne Lindqvist 32/59

33 T Computer Networks, Autumn /59 Routing Protocols Interior Gateway Protocols (IGP) vs. Exterior Gateway Protocols (EGP) distance vector vs. link state vs. path vector c Janne Lindqvist 33/59

34 T Computer Networks, Autumn /59 Autonomous Systems (AS) stub multihomed transit Today: autonomous systems c Janne Lindqvist 34/59

35 T Computer Networks, Autumn /59 Why IGP and EGP? Why the classification: intradomain interdomain? Discuss! c Janne Lindqvist 35/59

36 T Computer Networks, Autumn /59 Answer to Why IGP and EGP? If every AS had only two routers. It would mean routers in the Internet. Impossible with distance vector and link state protocols We need a divided routing scheme. c Janne Lindqvist 36/59

37 T Computer Networks, Autumn /59 Policy Routing Route preferences: do not use path that goes through AS 12 Which destinations are reported to which neighbors Path editing Practical examples university networks vs. corporate networks traffic originated and ending in Canada must not leave Canada c Janne Lindqvist 37/59

38 T Computer Networks, Autumn /59 Top-level Internet Routing peering points Finland, two Ethernet switches FICIX1 Espoo, Otaniemi FICIX2 Helsinki, Pasila 1 or 10 Gigabit Ethernet c Janne Lindqvist 38/59

39 T Computer Networks, Autumn /59 Routing Protocols Interior Gateway Protocols (IGP) vs. Exterior Gateway Protocols (EGP) distance vector vs. link state vs. path vector c Janne Lindqvist 39/59

40 T Computer Networks, Autumn /59 Border Gateway Protocol (BGP-4) Border routers BGP speakers Used between autonomous systems Provides reachability and path information TCP as transport c Janne Lindqvist 40/59

41 T Computer Networks, Autumn /59 BGP-4 Message Types Message Types 1 OPEN 2 UPDATE 3 NOTIFICATION 4 KEEPALIVE c Janne Lindqvist 41/59

42 T Computer Networks, Autumn /59 BGP-4 OPEN Message Version AS number Hold Time BGP Identifier: IP address Parameters Used to initialize communication c Janne Lindqvist 42/59

43 T Computer Networks, Autumn /59 BGP-4 UPDATE Message List of destinations to be removed. List of new available destinations and paths to them. Information from the receiver s perspective. c Janne Lindqvist 43/59

44 T Computer Networks, Autumn /59 BGP-4 Why Paths? Why UPDATE message contains path information? Discuss! c Janne Lindqvist 44/59

45 T Computer Networks, Autumn /59 Answer to BGP-4 Why paths? Detect loops Policy routing However, cannot be used to deduce the optimal route. c Janne Lindqvist 45/59

46 T Computer Networks, Autumn /59 BGP-4 KEEPALIVE Message For testing reachability Sending interval should be 1/3 of the hold timer c Janne Lindqvist 46/59

47 T Computer Networks, Autumn /59 BGP-4 NOTIFICATION Message For error reporting AS routing loop Hold time unacceptable etc. c Janne Lindqvist 47/59

48 T Computer Networks, Autumn /59 To Make Things Not Simple intradomain: I-BGP interdomain: E-BGP c Janne Lindqvist 48/59

49 T Computer Networks, Autumn /59 BGP Security misconfigurations e.g. a route that should have been filtered is exported e.g. October 2003 WorldCom s internal routers crashed attacks c Janne Lindqvist 49/59

50 T Computer Networks, Autumn /59 BGP Security No integrity, freshness or authentication for messages. No validation of AS authority for reachability information. No validation of announced path attributes. c Janne Lindqvist 50/59

51 T Computer Networks, Autumn /59 Attacks Against BGP Eavesdropping Replay Messsage insertion Message deletion Message modification Man-in-the-middle Denial of service c Janne Lindqvist 51/59

52 T Computer Networks, Autumn /59 Damage from Attacks starvation network congestion and delay blackhole looping eavesdrop cut and partition churn and instability resource exhaustion c Janne Lindqvist 52/59

53 T Computer Networks, Autumn /59 Protection from Attacks TCP MD5 option filtering (S-BGP?) c Janne Lindqvist 53/59

54 T Computer Networks, Autumn /59 Functions of IP Address unicast address interface identifier (socket binds to IP) topological locator (routing) multicast address group identifier c Janne Lindqvist 54/59

55 T Computer Networks, Autumn /59 Multicast in Theory Routers use multicast routing protocols to establish connectivity across Internet. Hosts tell routers that they want to receive from group G i. Any host can send to the group. Sending and receiving is simple by socket APIs. bandwidth-efficient group communication c Janne Lindqvist 55/59

56 T Computer Networks, Autumn /59 Multicast Routing Protocols flooding source-tree core-tree mesh hybrid Everyone has a favorite protocol (including me!) c Janne Lindqvist 56/59

57 T Computer Networks, Autumn /59 The Dichotomy Revisited intradomain Distance Vector Multicast Routing Protocol (DVMRP) Multicast Extensions to OSPF (MOSPF) Protocol Independent Multicast (PIM-SM) (PIM-DM) interdomain Multicast Source Discovery Protocol (MSDP) Border Gateway Multicast Protocol (BGMP) c Janne Lindqvist 57/59

58 T Computer Networks, Autumn /59 The Big Picture Default route in a host. OSPF in the access network in an AS. BGP between ASes. And additionally PIM and MBONE for multicast. c Janne Lindqvist 58/59

59 T Computer Networks, Autumn /59 That s All Questions? c Janne Lindqvist 59/59

Route Discovery Protocols

Route Discovery Protocols Route Discovery Protocols Columbus, OH 43210 Jain@cse.ohio-State.Edu http://www.cse.ohio-state.edu/~jain/ 1 Overview Building Routing Tables Routing Information Protocol Version 1 (RIP V1) RIP V2 OSPF

More information

Dynamic Routing Protocols II OSPF. Distance Vector vs. Link State Routing

Dynamic Routing Protocols II OSPF. Distance Vector vs. Link State Routing Dynamic Routing Protocols II OSPF Relates to Lab 4. This module covers link state routing and the Open Shortest Path First (OSPF) routing protocol. 1 Distance Vector vs. Link State Routing With distance

More information

Exterior Gateway Protocols (BGP)

Exterior Gateway Protocols (BGP) Exterior Gateway Protocols (BGP) Internet Structure Large ISP Large ISP Stub Dial-Up ISP Small ISP Stub Stub Stub Autonomous Systems (AS) Internet is not a single network! The Internet is a collection

More information

Layer 3 Routing User s Manual

Layer 3 Routing User s Manual User s Manual Second Edition, July 2011 www.moxa.com/product 2011 Moxa Inc. All rights reserved. User s Manual The software described in this manual is furnished under a license agreement and may be used

More information

Internet Control Message Protocol (ICMP)

Internet Control Message Protocol (ICMP) SFWR 4C03: Computer Networks & Computer Security Jan 31-Feb 4, 2005 Lecturer: Kartik Krishnan Lecture 13-16 Internet Control Message Protocol (ICMP) The operation of the Internet is closely monitored by

More information

Internet Routing Overview

Internet Routing Overview Internet Routing Overview AS, IGP,, BGP Agenda Routing at Large Types of Autonomous Systems -2 Introduction BGP Internet Routing Overview, v4.5 2 Page 45-1 Routing in Small Networks in small networks distance

More information

Routing in Small Networks. Internet Routing Overview. Agenda. Routing in Large Networks

Routing in Small Networks. Internet Routing Overview. Agenda. Routing in Large Networks Routing in Small Networks Internet Routing Overview AS, IGP,, BGP in small networks distance vector or link state protocols like RIP or OSPF can be used for dynamic routing it is possible that every router

More information

Outline. Internet Routing. Alleviating the Problem. DV Algorithm. Routing Information Protocol (RIP) Link State Routing. Routing algorithms

Outline. Internet Routing. Alleviating the Problem. DV Algorithm. Routing Information Protocol (RIP) Link State Routing. Routing algorithms Outline Internet Routing Venkat Padmanabhan Microsoft Research 9 pril 2001 Routing algorithms distance-vector (DV) link-state (LS) Internet Routing border gateway protocol (BGP) BGP convergence paper Venkat

More information

Inter-domain Routing. Outline. Border Gateway Protocol

Inter-domain Routing. Outline. Border Gateway Protocol Inter-domain Routing Outline Border Gateway Protocol Internet Structure Original idea Backbone service provider Consumer ISP Large corporation Consumer ISP Small corporation Consumer ISP Consumer ISP Small

More information

Objectives. Introduction. Classful IP Addressing. IPv4 Classful Addressing Structure (RFC 790)

Objectives. Introduction. Classful IP Addressing. IPv4 Classful Addressing Structure (RFC 790) 1 Objectives VLSM and CIDR Routing Protocols and Concepts Chapters 6 and 7 Compare and contrast classful and classless IP addressing. Review VLSM and explain the benefits of classless IP addressing. Describe

More information

Advanced Networking Routing: RIP, OSPF, Hierarchical routing, BGP

Advanced Networking Routing: RIP, OSPF, Hierarchical routing, BGP Advanced Networking Routing: RIP, OSPF, Hierarchical routing, BGP Renato Lo Cigno Routing Algorithms: One or Many? Is there a single routing protocol in the Internet? How can different protocols and algorithms

More information

Edges = communication links Vertices = computers, switches, routers, etc. For packet inbound at a particular vertex, determine what output edge to use

Edges = communication links Vertices = computers, switches, routers, etc. For packet inbound at a particular vertex, determine what output edge to use IP Routing Networks as Graphs Networks are graphs Edges = communication links Vertices = computers, switches, routers, etc For packet inbound at a particular vertex, determine what output edge to use Routers

More information

Lecture 11: Interdomain Routing

Lecture 11: Interdomain Routing Lecture 11: Interdomain Routing CSE 123: Computer Networks Stefan Savage Midterm on Thursday Midterm reminder Covers everything through Lecture 10 (link state routing) All associated assigned readings

More information

Interconnecting Cisco Networking Devices Part 2

Interconnecting Cisco Networking Devices Part 2 Interconnecting Cisco Networking Devices Part 2 Course Number: ICND2 Length: 5 Day(s) Certification Exam This course will help you prepare for the following exam: 640 816: ICND2 Course Overview This course

More information

Module 7. Routing and Congestion Control. Version 2 CSE IIT, Kharagpur

Module 7. Routing and Congestion Control. Version 2 CSE IIT, Kharagpur Module 7 Routing and Congestion Control Lesson 4 Border Gateway Protocol (BGP) Specific Instructional Objectives On completion of this lesson, the students will be able to: Explain the operation of the

More information

Router and Routing Basics

Router and Routing Basics Router and Routing Basics Malin Bornhager Halmstad University Session Number 2002, Svenska-CNAP Halmstad University 1 Routing Protocols and Concepts CCNA2 Routing and packet forwarding Static routing Dynamic

More information

IP Routing Configuring RIP, OSPF, BGP, and PBR

IP Routing Configuring RIP, OSPF, BGP, and PBR 13 IP Routing Configuring RIP, OSPF, BGP, and PBR Contents Overview..................................................... 13-6 Routing Protocols.......................................... 13-6 Dynamic Routing

More information

Inter-domain Routing Basics. Border Gateway Protocol. Inter-domain Routing Basics. Inter-domain Routing Basics. Exterior routing protocols created to:

Inter-domain Routing Basics. Border Gateway Protocol. Inter-domain Routing Basics. Inter-domain Routing Basics. Exterior routing protocols created to: Border Gateway Protocol Exterior routing protocols created to: control the expansion of routing tables provide a structured view of the Internet by segregating routing domains into separate administrations

More information

CSC458 Lecture 6. Homework #1 Grades. Inter-domain Routing IP Addressing. Administrivia. Midterm will Cover Following Topics

CSC458 Lecture 6. Homework #1 Grades. Inter-domain Routing IP Addressing. Administrivia. Midterm will Cover Following Topics CSC458 Lecture 6 Inter-domain Routing IP Addressing Stefan Saroiu http://www.cs.toronto.edu/syslab/courses/csc458 University of Toronto at Mississauga Homework #1 Grades Fraction of Students 100 80 60

More information

Based on Computer Networking, 4 th Edition by Kurose and Ross

Based on Computer Networking, 4 th Edition by Kurose and Ross Computer Networks Internet Routing Based on Computer Networking, 4 th Edition by Kurose and Ross Intra-AS Routing Also known as Interior Gateway Protocols (IGP) Most common Intra-AS routing protocols:

More information

Distance Vector Routing Protocols. Routing Protocols and Concepts Ola Lundh

Distance Vector Routing Protocols. Routing Protocols and Concepts Ola Lundh Distance Vector Routing Protocols Routing Protocols and Concepts Ola Lundh Objectives The characteristics of distance vector routing protocols. The network discovery process of distance vector routing

More information

order ateway Sicherheit im Internet, Patrick Lederer,, 18.05.2004

order ateway Sicherheit im Internet, Patrick Lederer,, 18.05.2004 B G order ateway M ulticast P rotocol 1 Abstract 1. Introduction 1. Introduction 2. Tasks and Rules of Border Routers 3. Implementations 4. Bidirectional Trees 4.1 Third Party Dependency 4.2 Method of

More information

Internet Firewall CSIS 4222. Packet Filtering. Internet Firewall. Examples. Spring 2011 CSIS 4222. net15 1. Routers can implement packet filtering

Internet Firewall CSIS 4222. Packet Filtering. Internet Firewall. Examples. Spring 2011 CSIS 4222. net15 1. Routers can implement packet filtering Internet Firewall CSIS 4222 A combination of hardware and software that isolates an organization s internal network from the Internet at large Ch 27: Internet Routing Ch 30: Packet filtering & firewalls

More information

Routing Protocols (RIP, OSPF, BGP)

Routing Protocols (RIP, OSPF, BGP) Chapter 13 Routing Protocols (RIP, OSPF, BGP) INTERIOR AND EXTERIOR ROUTING RIP OSPF BGP 1 The McGraw-Hill Companies, Inc., 2000 1 Introduction Packets may pass through several networks on their way to

More information

Layer 3 Routing User s Manual (UI 2.0)

Layer 3 Routing User s Manual (UI 2.0) Layer 3 Routing User s Manual (UI 2.0) Second Edition, June 2015 www.moxa.com/product Models covered by this manual: IKS-G6824A, ICS-G7826A, ICS-G7828A, ICS-G7848A, ICS-G7850A, ICS-G7852A Series 2015 Moxa

More information

Internet Protocol version 4

Internet Protocol version 4 Internet Protocol version 4 Claudio Cicconetti International Master on Communication Networks Engineering 2006/2007 Table of Contents IP Addressing Class-based IP addresses

More information

Using the Border Gateway Protocol for Interdomain Routing

Using the Border Gateway Protocol for Interdomain Routing CHAPTER 12 Using the Border Gateway Protocol for Interdomain Routing The Border Gateway Protocol (BGP), defined in RFC 1771, provides loop-free interdomain routing between autonomous systems. (An autonomous

More information

Chapter 4. Distance Vector Routing Protocols

Chapter 4. Distance Vector Routing Protocols Chapter 4 Distance Vector Routing Protocols CCNA2-1 Chapter 4 Note for Instructors These presentations are the result of a collaboration among the instructors at St. Clair College in Windsor, Ontario.

More information

Border Gateway Protocol (BGP)

Border Gateway Protocol (BGP) Border Gateway Protocol (BGP) Petr Grygárek rek 1 Role of Autonomous Systems on the Internet 2 Autonomous systems Not possible to maintain complete Internet topology information on all routers big database,

More information

IP Multicasting. Applications with multiple receivers

IP Multicasting. Applications with multiple receivers IP Multicasting Relates to Lab 10. It covers IP multicasting, including multicast addressing, IGMP, and multicast routing. 1 Applications with multiple receivers Many applications transmit the same data

More information

Computer Networks. Main Functions

Computer Networks. Main Functions Computer Networks The Network Layer 1 Routing. Forwarding. Main Functions 2 Design Issues Services provided to transport layer. How to design network-layer protocols. 3 Store-and-Forward Packet Switching

More information

TCP/IP Overview. Contents. Document ID: 13769

TCP/IP Overview. Contents. Document ID: 13769 TCP/IP Overview Document ID: 13769 Contents Introduction TCP/IP Technology TCP IP Routing in IP Environments Interior Routing Protocols RIP IGRP EIGRP OSPF Integrated IS IS Exterior Routing Protocols EGP

More information

GregSowell.com. Mikrotik Routing

GregSowell.com. Mikrotik Routing Mikrotik Routing Static Dynamic Routing To Be Discussed RIP Quick Discussion OSPF BGP What is Routing Wikipedia has a very lengthy explanation http://en.wikipedia.org/wiki/routing In the context of this

More information

OSPF Version 2 (RFC 2328) Describes Autonomous Systems (AS) topology. Propagated by flooding: Link State Advertisements (LSAs).

OSPF Version 2 (RFC 2328) Describes Autonomous Systems (AS) topology. Propagated by flooding: Link State Advertisements (LSAs). OSPF Version 2 (RFC 2328) Interior gateway protocol (IGP). Routers maintain link-state database. Describes Autonomous Systems (AS) topology. Propagated by flooding: Link State Advertisements (LSAs). Router

More information

CS 457 Lecture 17 Global Internet. Fall 2011

CS 457 Lecture 17 Global Internet. Fall 2011 CS 457 Lecture 17 Global Internet Fall 2011 Distance Vector: Poison Reverse If Z routes through Y to get to X : Z tells Y its (Z s) distance to X is infinite (so Y won t route to X via Z) Still, can have

More information

SOLUTIONS PRODUCTS TECH SUPPORT ABOUT JBM Online Ordering

SOLUTIONS PRODUCTS TECH SUPPORT ABOUT JBM Online Ordering SOLUTIONS PRODUCTS TECH SUPPORT ABOUT JBM Online Ordering SEARCH TCP/IP Tutorial This tutorial is intended to supply a brief overview of TCP/IP protocol. Explanations of IP addresses, classes, netmasks,

More information

6.263 Data Communication Networks

6.263 Data Communication Networks 6.6 Data Communication Networks Lecture : Internet Routing (some slides are taken from I. Stoica and N. Mckewon & T. Griffin) Dina Katabi dk@mit.edu www.nms.csail.mit.edu/~dina Books Text Book Data Communication

More information

Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ

Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ Computer Networks 1 (Mạng Máy Tính 1) Lectured by: Dr. Phạm Trần Vũ 1 Lecture 7: Network Layer in the Internet Reference: Chapter 5 - Computer Networks, Andrew S. Tanenbaum, 4th Edition, Prentice Hall,

More information

Course Overview: Learn the essential skills needed to set up, configure, support, and troubleshoot your TCP/IP-based network.

Course Overview: Learn the essential skills needed to set up, configure, support, and troubleshoot your TCP/IP-based network. Course Name: TCP/IP Networking Course Overview: Learn the essential skills needed to set up, configure, support, and troubleshoot your TCP/IP-based network. TCP/IP is the globally accepted group of protocols

More information

Cisco BGP Case Studies

Cisco BGP Case Studies Table of Contents BGP Case Studies...1 BGP4 Case Studies Section 1...3 Contents...3 Introduction...3 How Does BGP Work?...3 ebgp and ibgp...3 Enabling BGP Routing...4 Forming BGP Neighbors...4 BGP and

More information

640-816: Interconnecting Cisco Networking Devices Part 2 v1.1

640-816: Interconnecting Cisco Networking Devices Part 2 v1.1 640-816: Interconnecting Cisco Networking Devices Part 2 v1.1 Course Introduction Course Introduction Chapter 01 - Small Network Implementation Introducing the Review Lab Cisco IOS User Interface Functions

More information

Lecture 15: Addressing and Routing Architecture

Lecture 15: Addressing and Routing Architecture Lecture 15: Addressing and Routing Architecture Prof. Shervin Shirmohammadi SITE, University of Ottawa Prof. Shervin Shirmohammadi CEG 4185 15-1 Addressing & Routing Addressing is assigning identifiers

More information

Internet Control Protocols Reading: Chapter 3

Internet Control Protocols Reading: Chapter 3 Internet Control Protocols Reading: Chapter 3 ARP - RFC 826, STD 37 DHCP - RFC 2131 ICMP - RFC 0792, STD 05 1 Goals of Today s Lecture Bootstrapping an end host Learning its own configuration parameters

More information

Routing with OSPF. Introduction

Routing with OSPF. Introduction Routing with OSPF Introduction The capabilities of an internet are largely determined by its routing protocol. An internet's scalability, its ability to quickly route around failures, and the consumption

More information

Border Gateway Protocol (BGP-4)

Border Gateway Protocol (BGP-4) Vanguard Applications Ware IP and LAN Feature Protocols Border Gateway Protocol (BGP-4) Notice 2008 Vanguard Networks 25 Forbes Blvd Foxboro, MA 02035 Phone: (508) 964 6200 Fax: (508) 543 0237 All rights

More information

Routing Protocols. Interconnected ASes. Hierarchical Routing. Hierarchical Routing

Routing Protocols. Interconnected ASes. Hierarchical Routing. Hierarchical Routing Routing Protocols scale: with 200 million destinations: can t store all dest s in routing tables! routing table exchange would swamp links! Hierarchical Routing Our routing study thus far - idealization

More information

College 5, Routing, Internet. Host A. Host B. The Network Layer: functions

College 5, Routing, Internet. Host A. Host B. The Network Layer: functions CSN-s 5/1 College 5, Routing, Internet College stof 1 Inleiding: geschiedenis, OSI model, standaarden, ISOC/IETF/IRTF structuur Secties: 1.2, 1.3, 1.4, 1.5 2 Fysieke laag: Bandbreedte/bitrate Secties:

More information

From the previous lecture

From the previous lecture CS 640: Introduction to Computer Networks Aditya Akella Lecture 7 - IP: Addressing and Forwarding From the previous lecture We will cover spanning tree from the last lecture 2 Spanning Tree Bridges More

More information

Data Networking and Architecture. Delegates should have some basic knowledge of Internet Protocol and Data Networking principles.

Data Networking and Architecture. Delegates should have some basic knowledge of Internet Protocol and Data Networking principles. Data Networking and Architecture The course focuses on theoretical principles and practical implementation of selected Data Networking protocols and standards. Physical network architecture is described

More information

Lecture 8: Routing I Distance-vector Algorithms. CSE 123: Computer Networks Stefan Savage

Lecture 8: Routing I Distance-vector Algorithms. CSE 123: Computer Networks Stefan Savage Lecture 8: Routing I Distance-vector Algorithms CSE 3: Computer Networks Stefan Savage This class New topic: routing How do I get there from here? Overview Routing overview Intra vs. Inter-domain routing

More information

Lecture 12: Link-state Routing"

Lecture 12: Link-state Routing Lecture 2: Link-state Routing" CSE 23: Computer Networks Alex C. Snoeren HW 3 due next Tuesday! Lecture 2 Overview" Routing overview Intra vs. Inter-domain routing Link-state routing protocols CSE 23 Lecture

More information

Introduction to LAN/WAN. Network Layer

Introduction to LAN/WAN. Network Layer Introduction to LAN/WAN Network Layer Topics Introduction (5-5.1) Routing (5.2) (The core) Internetworking (5.5) Congestion Control (5.3) Network Layer Design Isues Store-and-Forward Packet Switching Services

More information

Introduction to Local and Wide Area Networks

Introduction to Local and Wide Area Networks Introduction to Local and Wide Area Networks Lecturers Amnach Khawne Jirasak Sittigorn Chapter 1 1 Routing Protocols and Concepts Chapter 6 : VLSM and CIDR Chapter 7 : RIPv2 Chapter 1 2 VLSM and CIDR Routing

More information

Internet inter-as routing: BGP

Internet inter-as routing: BGP Internet inter-as routing: BGP BGP (Border Gateway Protocol): the de facto standard BGP provides each AS a means to: 1. Obtain subnet reachability information from neighboring ASs. 2. Propagate the reachability

More information

Wide Area Networks. Learning Objectives. LAN and WAN. School of Business Eastern Illinois University. (Week 11, Thursday 3/22/2007)

Wide Area Networks. Learning Objectives. LAN and WAN. School of Business Eastern Illinois University. (Week 11, Thursday 3/22/2007) School of Business Eastern Illinois University Wide Area Networks (Week 11, Thursday 3/22/2007) Abdou Illia, Spring 2007 Learning Objectives 2 Distinguish between LAN and WAN Distinguish between Circuit

More information

Lecture 2.1 : The Distributed Bellman-Ford Algorithm. Lecture 2.2 : The Destination Sequenced Distance Vector (DSDV) protocol

Lecture 2.1 : The Distributed Bellman-Ford Algorithm. Lecture 2.2 : The Destination Sequenced Distance Vector (DSDV) protocol Lecture 2 : The DSDV Protocol Lecture 2.1 : The Distributed Bellman-Ford Algorithm Lecture 2.2 : The Destination Sequenced Distance Vector (DSDV) protocol The Routing Problem S S D D The routing problem

More information

OSPF Routing Protocol

OSPF Routing Protocol OSPF Routing Protocol Contents Introduction Network Architecture Campus Design Architecture Building Block Design Server Farm Design Core Block Design WAN Design Architecture Protocol Design Campus Design

More information

Administrative Distance

Administrative Distance RIP is a distance vector routing protocol. It shares routing information through the local broadcast in every 30 seconds. In this tutorial we will explain RIP routing fundamentals with examples such as

More information

9025- TCP/IP Networking. History and Standards. Review of Numbering Systems. Local Signaling. IP Addressing

9025- TCP/IP Networking. History and Standards. Review of Numbering Systems. Local Signaling. IP Addressing 9025- TCP/IP Networking History and Standards ARPA NCP TCP, IP, ARPANET PARC Collaborative Network Requirements One Protocol? Peer-to-Peer Protocols Documentation and RFCs RFC Categories Where to Find

More information

Advanced Computer Networks

Advanced Computer Networks Introduction to Mobile Ad hoc Networks (MANETs) Advanced Computer Networks Outline Ad hoc networks Differences to other networks Applications Research areas Routing Other research areas Enabling Technologies

More information

The Internet. Internet Technologies and Applications

The Internet. Internet Technologies and Applications The Internet Internet Technologies and Applications Aim and Contents Aim: Review the main concepts and technologies used in the Internet Describe the real structure of the Internet today Contents: Internetworking

More information

Would normally be due in a week, but there is no school next Wed so it ll be due Nov 16 th instead

Would normally be due in a week, but there is no school next Wed so it ll be due Nov 16 th instead CSE 123 Computer Networks Fall 2009 Lecture 9 Internet Routing: Link State Algorithms and Inter-domain Routing Assignments HW #2 is out Would normally be due in a week, but there is no school next Wed

More information

Examination. IP routning på Internet och andra sammansatta nät, DD2491 IP routing in the Internet and other complex networks, DD2491

Examination. IP routning på Internet och andra sammansatta nät, DD2491 IP routing in the Internet and other complex networks, DD2491 Examination IP routning på Internet och andra sammansatta nät, DD2491 IP routing in the Internet and other complex networks, DD2491 Date: December 15 2009 14:00 18:00 1. No help material is allowed - You

More information

Outline. EE 122: Interdomain Routing Protocol (BGP) BGP Routing. Internet is more complicated... Ion Stoica TAs: Junda Liu, DK Moon, David Zats

Outline. EE 122: Interdomain Routing Protocol (BGP) BGP Routing. Internet is more complicated... Ion Stoica TAs: Junda Liu, DK Moon, David Zats Outline EE 22: Interdomain Routing Protocol (BGP) Ion Stoica TAs: Junda Liu, DK Moon, David Zats http://inst.eecs.berkeley.edu/~ee22/fa9 (Materials with thanks to Vern Paxson, Jennifer Rexford, and colleagues

More information

Link-State Routing Protocols

Link-State Routing Protocols Link-State Routing Protocols Malin Bornhager Halmstad University Session Number 2002, Svenska-CNAP Halmstad University 1 Objectives Link-state routing protocol Single-area OSPF concepts Single-area OSPF

More information

CHAPTER 10 IP MULTICAST

CHAPTER 10 IP MULTICAST CHAPTER 10 IP MULTICAST This chapter is about IP multicast, the network layer mechanisms in the Internet to support applications where data is sent from a sender to multiple receivers. The first section

More information

IP Addressing. and Routing. Prepared by : Swapan Purkait Director. Nettech Private Ltd. swapan@nettech.in + 91 93315 90003

IP Addressing. and Routing. Prepared by : Swapan Purkait Director. Nettech Private Ltd. swapan@nettech.in + 91 93315 90003 For Summer Training on Computer Networking visit IP Addressing Prepared by : Swapan Purkait Director Nettech Private Limited swapan@nettech.in + 91 93315 90003 and Routing IP Addresses Basic IP Addressing

More information

Routing Basics. Chapter Goals. What Is Routing? CHAPTER

Routing Basics. Chapter Goals. What Is Routing? CHAPTER CHAPTER 5 Chapter Goals Learn the basics of routing protocols Learn the differences between link-state and distance vector routing protocols Learn about the metrics used by routing protocols to determine

More information

Final Exam. Route Computation: One reason why link state routing is preferable to distance vector style routing.

Final Exam. Route Computation: One reason why link state routing is preferable to distance vector style routing. UCSD CSE CS 123 Final Exam Computer Networks Directions: Write your name on the exam. Write something for every question. You will get some points if you attempt a solution but nothing for a blank sheet

More information

Protocol Specification & Design. The Internet and its Protocols. Course Outline (trivia) Introduction to the Subject Teaching Methods

Protocol Specification & Design. The Internet and its Protocols. Course Outline (trivia) Introduction to the Subject Teaching Methods The Internet and its Protocols Protocol Specification & Design Robert Elz kre@munnari.oz.au kre@coe.psu.ac.th http://fivedots.coe.psu.ac.th/~kre/ Friday: 13:30-15:00 (Rm: 101)???: xx:x0-xx:x0 (Rm:???)

More information

Autumn Oct 21, Oct 21, 2004 CS573: Network Protocols and Standards 1 Oct 21, 2004 CS573: Network Protocols and Standards 2

Autumn Oct 21, Oct 21, 2004 CS573: Network Protocols and Standards 1 Oct 21, 2004 CS573: Network Protocols and Standards 2 IPv4 IP: Addressing, ARP, Routing Protocols and Standards Autumn 2004-2005 IP Datagram Format IPv4 Addressing ARP and RARP IP Routing Basics Subnetting and Supernetting ICMP Address Translation (NAT) Dynamic

More information

Cisco CCNP 642 901 Optimizing Converged Cisco Networks (ONT)

Cisco CCNP 642 901 Optimizing Converged Cisco Networks (ONT) Cisco CCNP 642 901 Optimizing Converged Cisco Networks (ONT) Course Number: 642 901 Length: 5 Day(s) Certification Exam This course will help you prepare for the following exams: Cisco CCNP Exam 642 901:

More information

Chapter 49 Border Gateway Protocol version 4 (BGP-4)

Chapter 49 Border Gateway Protocol version 4 (BGP-4) Chapter 49 Border Gateway Protocol version 4 (BGP-4) Introduction... 1-3 Overview of BGP-4... 1-3 BGP Operation... 1-5 BGP Attributes... 1-6 BGP Route Selection... 1-8 Classless Inter-domain Routing (CIDR)

More information

Internetworking and Internet-1. Global Addresses

Internetworking and Internet-1. Global Addresses Internetworking and Internet Global Addresses IP servcie model has two parts Datagram (connectionless) packet delivery model Global addressing scheme awaytoidentifyall H in the internetwork Properties

More information

Solution sheet Mid-Semester Test 2009

Solution sheet Mid-Semester Test 2009 Solution sheet Mid-Semester Test 2009 Question 1 Short Answer Questions 1.1 Match the following to one or more layers of the OSI model: a) Communicates directly with the user s application program application

More information

Internet Protocol version 4 Part I

Internet Protocol version 4 Part I Internet Protocol version 4 Part I Claudio Cicconetti International Master on Information Technology International Master on Communication Networks Engineering Table of Contents

More information

Administra0via. STP lab due Wednesday (in BE 301a!), 5/15 BGP quiz Thursday (remember required reading), 5/16

Administra0via. STP lab due Wednesday (in BE 301a!), 5/15 BGP quiz Thursday (remember required reading), 5/16 BGP Brad Smith Administra0via How are the labs going? This week STP quiz Thursday, 5/9 Next week STP lab due Wednesday (in BE 301a!), 5/15 BGP quiz Thursday (remember required reading), 5/16 Following

More information

CLASSLESS INTER DOMAIN ROUTING - CIDR

CLASSLESS INTER DOMAIN ROUTING - CIDR CLASSLESS INTER DOMAIN ROUTING - CIDR Marko Luoma Helsinki University of Technology Laboratory of Telecommunications Technology Marko.Luoma@hut.fi ABSTRACT As the Internet evolved and become more familiar

More information

BGP overview BGP operations BGP messages BGP decision algorithm BGP states

BGP overview BGP operations BGP messages BGP decision algorithm BGP states BGP overview BGP operations BGP messages BGP decision algorithm BGP states 1 BGP overview Currently in version 4. InterAS (or Interdomain) routing protocol for exchanging network reachability information

More information

Faculty of Engineering Computer Engineering Department Islamic University of Gaza 2012. Network Chapter# 19 INTERNETWORK OPERATION

Faculty of Engineering Computer Engineering Department Islamic University of Gaza 2012. Network Chapter# 19 INTERNETWORK OPERATION Faculty of Engineering Computer Engineering Department Islamic University of Gaza 2012 Network Chapter# 19 INTERNETWORK OPERATION Review Questions ٢ Network Chapter# 19 INTERNETWORK OPERATION 19.1 List

More information

Lecture 18: Border Gateway Protocol"

Lecture 18: Border Gateway Protocol Lecture 18: Border Gateway Protocol" CSE 123: Computer Networks Alex C. Snoeren HW 3 due Wednesday! Some figures courtesy Mike Freedman Lecture 18 Overview" Path-vector Routing Allows scalable, informed

More information

Appendix A Protocols. Data Link Layer

Appendix A Protocols. Data Link Layer Appendix A Protocols The LAN environment of the networks application focuses on modeling broadcast network architectures within a single autonomous system (or routing domain), and therefore its protocol

More information

APNIC elearning: BGP Basics. Contact: training@apnic.net. erou03_v1.0

APNIC elearning: BGP Basics. Contact: training@apnic.net. erou03_v1.0 erou03_v1.0 APNIC elearning: BGP Basics Contact: training@apnic.net Overview What is BGP? BGP Features Path Vector Routing Protocol Peering and Transit BGP General Operation BGP Terminology BGP Attributes

More information

Week 4 / Paper 1. Open issues in Interdomain Routing: a survey

Week 4 / Paper 1. Open issues in Interdomain Routing: a survey Week 4 / Paper 1 Open issues in Interdomain Routing: a survey Marcelo Yannuzzi, Xavier Masip-Bruin, Olivier Bonaventure IEEE Network, Nov.-Dec. 2005, vol. 19, no. 6, pp. 49 56 Main point There are many

More information

Comparison of RIP, EIGRP, OSPF, IGRP Routing Protocols in Wireless Local Area Network (WLAN) By Using OPNET Simulator Tool - A Practical Approach

Comparison of RIP, EIGRP, OSPF, IGRP Routing Protocols in Wireless Local Area Network (WLAN) By Using OPNET Simulator Tool - A Practical Approach Comparison of RIP, EIGRP, OSPF, IGRP Routing Protocols in Wireless Local Area Network (WLAN) By Using OPNET Simulator Tool - A Practical Approach U. Dillibabau 1, Akshay 2, M. Lorate Shiny 3 UG Scholars,

More information

Question 1. [7 points] Consider the following scenario and assume host H s routing table is the one given below:

Question 1. [7 points] Consider the following scenario and assume host H s routing table is the one given below: Computer Networks II Master degree in Computer Engineering Exam session: 11/02/2009 Teacher: Emiliano Trevisani Last name First name Student Identification number You are only allowed to use a pen and

More information

8.2 The Internet Protocol

8.2 The Internet Protocol TCP/IP Protocol Suite HTTP SMTP DNS RTP Distributed applications Reliable stream service TCP UDP User datagram service Best-effort connectionless packet transfer Network Interface 1 IP Network Interface

More information

Agenda. Distributed System Structures. Why Distributed Systems? Motivation

Agenda. Distributed System Structures. Why Distributed Systems? Motivation Agenda Distributed System Structures CSCI 444/544 Operating Systems Fall 2008 Motivation Network structure Fundamental network services Sockets and ports Client/server model Remote Procedure Call (RPC)

More information

VXLAN: Scaling Data Center Capacity. White Paper

VXLAN: Scaling Data Center Capacity. White Paper VXLAN: Scaling Data Center Capacity White Paper Virtual Extensible LAN (VXLAN) Overview This document provides an overview of how VXLAN works. It also provides criteria to help determine when and where

More information

RARP: Reverse Address Resolution Protocol

RARP: Reverse Address Resolution Protocol SFWR 4C03: Computer Networks and Computer Security January 19-22 2004 Lecturer: Kartik Krishnan Lectures 7-9 RARP: Reverse Address Resolution Protocol When a system with a local disk is bootstrapped it

More information

Networking IP and Convergence: Advanced TCP

Networking IP and Convergence: Advanced TCP coursemonster.com/me Networking IP and Convergence: Advanced TCP View training dates» Overview This is an in depth technical course that covers the TCPIP protocols in more detail than the Introduction

More information

Introduction to Dynamic Routing Protocols

Introduction to Dynamic Routing Protocols CHAPTER 3 Introduction to Dynamic Routing Protocols Objectives Upon completion of this chapter, you should be able to answer the following questions: Can you describe the role of dynamic routing protocols

More information

Introduction to TCP/IP

Introduction to TCP/IP Introduction to TCP/IP Raj Jain The Ohio State University Columbus, OH 43210 Nayna Networks Milpitas, CA 95035 Email: Jain@ACM.Org http://www.cis.ohio-state.edu/~jain/ 1 Overview! Internetworking Protocol

More information

100-101: Interconnecting Cisco Networking Devices Part 1 v2.0 (ICND1)

100-101: Interconnecting Cisco Networking Devices Part 1 v2.0 (ICND1) 100-101: Interconnecting Cisco Networking Devices Part 1 v2.0 (ICND1) Course Overview This course provides students with the knowledge and skills to implement and support a small switched and routed network.

More information

Chapter 3 LAN Configuration

Chapter 3 LAN Configuration Chapter 3 LAN Configuration This chapter describes how to configure the advanced LAN features of your ProSafe Dual WAN Gigabit Firewall with SSL & IPsec VPN. This chapter contains the following sections

More information

Figure 5.1: Issues addressed by network layer protocols. (Figure by Forouzan)

Figure 5.1: Issues addressed by network layer protocols. (Figure by Forouzan) Chapter 5 Network Layer The main responsibility of a network layer protocol is host-to-host data delivery. In doing this, the network layer has to deal with network layer addressing, packetization and

More information

Network Test 3 Study Guide

Network Test 3 Study Guide Name: Class: Date: Network Test 3 Study Guide Multiple Choice Identify the choice that best completes the statement or answers the question. 1. When a frame is received, which component reads the source

More information

Datagram-based network layer: forwarding; routing. Additional function of VCbased network layer: call setup.

Datagram-based network layer: forwarding; routing. Additional function of VCbased network layer: call setup. CEN 007C Computer Networks Fundamentals Instructor: Prof. A. Helmy Homework : Network Layer Assigned: Nov. 28 th, 2011. Due Date: Dec 8 th, 2011 (to the TA) 1. ( points) What are the 2 most important network-layer

More information

Overview of Network Interface Types, Configurations, and Best Practices on IBM DataPower Gateway Firmware Version 7.1

Overview of Network Interface Types, Configurations, and Best Practices on IBM DataPower Gateway Firmware Version 7.1 IBM Software Group Overview of Network Interface Types, Configurations, and Best Practices on IBM DataPower Gateway Firmware Version 7.1 Phil Johnson pajohnso@us.ibm.com Chris Sloan cmsloan@us.ibm.com

More information

BOOTP Limitations. Dynamic IP Address Assignment. DHCP IP address assignment. Dynamic Host Configuration Protocol (DHCP)

BOOTP Limitations. Dynamic IP Address Assignment. DHCP IP address assignment. Dynamic Host Configuration Protocol (DHCP) slide 1 Dynamic IP Address Assignment BOOTP Limitations slide 2 BOOTP provides a configuration setting for a client IP address, operating system, subnet mask, dns server, gateway address aset of static

More information