IT 529: Advanced Networking

1. IT 529: Advanced Networking The nitty-gritty of enterprise networks. Understanding evolution of technology. This is my favorite class to teach!!!!

2. Academic Qualifications • BS BYU 1974 • MS BYU 1976 • Ph.D. BYU 1992 • BYU PT faculty 1979-1987, 2000 • Associate Professor 2001 • Continuing Status 2006 • IAEGC Certificate Purdue 2004 • Writing committee for IT2005-8 • Lead author on Networking and Security

3. Standards Committees • OMG (Corba 2.0) • IEEE 802 • 802.1Q VLANs • 802.1x Authentication • 802.1D 1998

4. System Software • Operating Systems • Compilers • Linkers/Loaders • Object-oriented Design and Programming Systems

5. Embedded Systems • Automatic Storage and Retrieval Systems • Military applications • Microprocessor Control ROMs

6. Application Areas • Medical • Banking • Information Retrieval and Indexing • Network Management • LAN Switch Software design • Email archiving and retreival • Computing in the cloud

7. Business • 6-8 Startups (Depending on how you count) • 4 Large Companies • VP • Director • CTO • Consulting Engineer • MTS • Consultant

8. Summary • Programmer since 1966 • (BAL, Fortran, Cobol) • Don’t use a programming language that was available when I got my masters in 1976! • (Python,Java, C, C++, C#) • Less programming in last 20 years. • Now design and telling someone else how to do it. • You will probably do a lot of different things during your life • You will have to learn continuously or become obsolete • The only obvious constant is change • People (especially in groups) are basically the same • Standards are a pain, but are better than the alternatives

9. What the course is not… • Preparation to build an international corporate WAN • Preparation to build a new router • Coverage of every protocol that has ever been • Detailed analysis of all the standards that you might need to know • …

10. The course: Evolution and Management of Enterprise Networks • Radia Perlman one of the most influential people in networking … and the author of your text. She really knows what she is talking about! • Local and metropolitan networks with their connections to the Internet. • ISO 7 layer model, Internet 5 layer model • Layer 2 infrastructure: Vlans, Monitoring… • Layer 3 infrastructure: Global, Local Routing • Hardware, Firmware, Software device evolution • Standards: Layer 1, Layer 2, Layer 3, … • Network design and construction • Theory • Winners, losers, good guesses, stupid decisions and serendipity • Choosing boxes and tools… crystal balls and coin tosses

11. 2nd Half: What do you want? • Graduate course • Seminar Format • Groups of 2-3 students present approved research topics. • Formal presentation (1 class period) • Formal research paper

12. FTP HTTP NV TFTP UDP TCP IP … NET NET NET 2 1 n Internet Architecture • Defined by Internet Engineering Task Force (IETF) • Hourglass Design • Application vs Application Protocol (FTP, HTTP)

13. ISO Architecture (OSI Model) End host End host Application Application Presentation Presentation Session Session Transport Transport Network Network Network Network Data link Data link Data link Data link Physical Physical Physical Physical One or more nodes within the network

14. TCP/IP and the OSI Model Ref: From Foruzan Text

15. Actual Vocabulary • We use ISO terminology, however, • Typically use IETF technology above layer 2 • Since IETF doesn’t define “Network” but rather “internetwork” we use ISO terminology and technology for layer 2 and below • IEEE 802 dominates enterprise and now “last mile”

16. IEEE 802: LAN MAN Standards • Evolution that sometimes looks revolutionary. • 802.1: Layer 2 architecture • Bridging • Switching • Forwarding • Spanning Tree • Multiple Spanning Tree • Virtual Lans and spanning trees

17. Goal: Be able to Read Standards The VLAN Bridging specification contained in IEEE Std 802.1Q-2003 is independent of this standard, inthe sense that IEEE Std 802.1Q-2003 contains its own statement of the conformance requirements forVLAN Bridges. However, IEEE Std 802.1Q-2003 makes use of many of the elements of the specificationcontained in this standard, in particulara) The Bridge architectureb) The Internal Sublayer Service, and the specification of its provision by IEEE 802 LAN MACsc) The major features of the operation of the forwarding processd) The Rapid Spanning Tree Protocole) The Generic Attribute Registration Protocol (GARP)f) The GARP Multicast Registration Protocol (GMRP)Since the original Spanning Tree Protocol (STP) has been removed from the 2004 revision of IEEE Std802.1D, an implementation of RSTP is required for any claim of conformance for an implementation ofIEEE Std 802.1Q-2003 that refers to the current revision of IEEE Std 802.1D unless that implementationincludes the Multiple Spanning Tree Protocol (MSTP) specified in IEEE Std 802.1Q-2003. MSTP is basedon RSTP, extended to provide support for multiple spanning trees. Excerpt from 802.1D 2003 p. iii

18. 802.1 Definition of Layer 2 Excerpt from 802.1D 2003 p. 11

19. Summary II • Things change so should you • You have to watch so the change doesn’t sneak up on you • Example: VLANs and Spanning Tree • Key concepts: • Layering and interface between layers • Spanning Tree/ Rapid Spanning Tree • Relationships to Forwarding Tables