Transcript Lecture 1 - IT 529 Advanced Networking

IT 529: Advanced Networking
The nitty-gritty of enterprise networks.
Understanding evolution of technology.
This is my favorite class to teach!!!!
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
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Lead author on Networking and Security
Standards Committees
OMG (Corba 2.0)
IEEE 802
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802.1Q VLANs
802.1x Authentication
802.1D 1998
System Software
Operating Systems
Compilers
Linkers/Loaders
Object-oriented Design and
Programming Systems
Embedded Systems
Automatic Storage and Retrieval
Systems
Military applications
Microprocessor Control ROMs
Application Areas
Medical
Banking
Information Retrieval and Indexing
Network Management
LAN Switch Software design
Email archiving and retreival
Computing in the cloud
Business
6-8 Startups (Depending on how you count)
4 Large Companies
VP
Director
CTO
Consulting Engineer
MTS
Consultant
Summary
Programmer since 1966
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(BAL, Fortran, Cobol)
Don’t use a programming language that was available when I
got my masters in 1976!
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(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
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
…
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
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Theory
Winners, losers, good guesses, stupid decisions and serendipity
Choosing boxes and tools… crystal balls and coin tosses
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
Internet Architecture
Defined by Internet Engineering Task Force (IETF)
Hourglass Design
Application vs Application Protocol (FTP, HTTP)
FTP
HTTP
NV
TFTP
UDP
TCP
IP
NET1
NET2
…
NETn
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
TCP/IP and the OSI Model
Ref: From Foruzan Text
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”
IEEE 802: LAN MAN Standards
Evolution that sometimes looks revolutionary.
802.1: Layer 2 architecture
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Bridging
Switching
Forwarding
Spanning Tree
Multiple Spanning Tree
Virtual Lans and spanning trees
Goal: Be able to Read Standards
The VLAN Bridging specification contained in IEEE Std 802.1Q-2003 is independent of this standard, in
the sense that IEEE Std 802.1Q-2003 contains its own statement of the conformance requirements for
VLAN Bridges. However, IEEE Std 802.1Q-2003 makes use of many of the elements of the specification
contained in this standard, in particular
a) The Bridge architecture
b) The Internal Sublayer Service, and the specification of its provision by IEEE 802 LAN MACs
c) The major features of the operation of the forwarding process
d) The Rapid Spanning Tree Protocol
e) 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 Std
802.1D, an implementation of RSTP is required for any claim of conformance for an implementation of
IEEE Std 802.1Q-2003 that refers to the current revision of IEEE Std 802.1D unless that implementation
includes the Multiple Spanning Tree Protocol (MSTP) specified in IEEE Std 802.1Q-2003. MSTP is based
on RSTP, extended to provide support for multiple spanning trees.
Excerpt from 802.1D 2003 p. iii
802.1 Definition of Layer 2
Excerpt from 802.1D 2003 p. 11
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:
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Layering and interface between layers
Spanning Tree/ Rapid Spanning Tree
Relationships to Forwarding Tables