Cisco 2521LF - 2521LF Router Bedienungsanleitung Seite 18

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18
Copyright © 1997 Cisco Systems, Inc.
6-35CSE: Networking Fundamentals WAN Basics
© 1999, Cisco Systems, Inc.
www.cisco.com
IGRP Routing Metrics
IGRP Routing Metrics
Routing metric used by IGRP is composite
Bandwidth, delay, reliability, load, MTU
Routing process selects the “fastest” path
IP load balancing is enabled by default
C 4.0 dir conn Ser0
C 5.0 dir conn Eth0
I 10.0 [100/327684] via 5.4, Eth0
TR
10.0
5.1
5.2
5.3
5.4
4.0
FDDI
These Addresses Are All Part
of the 192.168.0.0 Network
These Addresses Are All Part
of the 192.168.0.0 Network
6-36CSE: Networking Fundamentals WAN Basics
© 1999, Cisco Systems, Inc.
www.cisco.com
Routers Forward Traffic
Routers Forward Traffic
Routing protocols maintain neighbor relationships
with adjacent (connected) routers
Neighboring routers and routing protocols
exchange frames containing either:
Hello packets
Routing update packets
Routing tables contain routes learned from
neighboring routers
Routers forward traffic to the destination network
by passing packets to the next-hop logical device
(router) in the delivery path
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