Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA.
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301
0947_05F9_c2
© 1999, Cisco Systems, Inc.
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© 1999, Cisco Systems, Inc.
301
0947_05F9_c2
Introduction to Routing
Session 301
Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA.
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301
0947_05F9_c2
© 1999, Cisco Systems, Inc.
Agenda
• Addressing
• Concepts
• Routing Protocols
• Statics and Defaults
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© 1999, Cisco Systems, Inc.
Routing Information
Protocol (RIP and RIPv2)
Interior Gateway Routing
Protocol (IGRP)
Open Shortest Path First
(OSPF) Protocol
NetWare Link Services
Protocol (NLSP)
Intermediate System to
Intermediate System (IS-IS)
Enhanced IGRP (EIGRP)
Border Gateway Protocol (BGP)
Physical Layer
Network Layer
Transport
Session
Presentation
Application
Data Link Control
L1
L2
L3
L4
L5
L6
L7
ISO—OSI Reference Model
Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA.
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5
301
0947_05F9_c2
© 1999, Cisco Systems, Inc.
Router Functions
• Routing = building
maps and giving
directions
• Switching =
moving packets
between interfaces
• Routers are packet
switches
• Path determination
is overhead
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© 1999, Cisco Systems, Inc.
UNIX Host
UNIX Host
Company A
Company B
Internet
TCP/IP
Introduction to IP Addresses
• Unique addressing allows communication
between end stations
• Path choice is based on location
• Location is represented by an address
Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA.
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301
0947_05F9_c2
© 1999, Cisco Systems, Inc.
32 Bits
Network
Host
172 .
16 . 122 . 204
IP Addressing
8 Bits
8 Bits
8 Bits
8 Bits
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• Class A:
• Class B:
• Class C:
• Class D: for multicast
N = Network number assigned by NIC
H = Host number assigned by network administrator
N
H
H
H
IP Address Classes
N
N
H
H
N
N
N
H
Copyright © 1998, Cisco Systems, Inc. All rights reserved. Printed in USA.
Pr