Building Scalable Cisco Internetworks. Student Guide by Cisco Systems

By Cisco Systems

This module explains why it is vital to govern routing info. in the course of course redistribution among IP routing domain names, suboptimal routing can take place with no manipulation. There also are occasions whilst routing details could waste bandwidth on a router interface simply because routing details isn't needed.This module presents an outline and examples of easy methods to enforce the controls defined above with Cisco structures units.

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EIGRP Capabilities and Attributes Key capabilities that distinguish EIGRP from other routing protocols include fast convergence, support for variable-length subnet masking (VLSM), support for partial updates, and support for multiple network layer protocols. This topic describes these capabilities. EIGRP Features • Advanced distance vector • Fast convergence • Support for VLSM and discontiguous subnets • Partial updates • Support for multiple network-layer protocols • Flexible network design • Multicast and unicast instead of broadcast address • Manual summarization at any point • 100% loop-free classless routing • Easy configuration for WANs and LANs • Load balancing across equaland unequal-cost pathways © 2006 Cisco Systems, Inc.

0 to match all four octets of the address. 255 matches all interfaces on the router. © 2006 Cisco Systems, Inc. , for the sole use by Cisco employees for personal study. The files or printed representations may not be used in commercial training, and may not be distributed for purposes other than individual self-study. ) Router(config-if)# bandwidth kilobits • Defines the interface’s bandwidth for the purposes of sending routing update traffic. © 2006 Cisco Systems, Inc. All rights reserved. 0—2-3 If you are using serial links, define the bandwidth of the link for the purposes of sending routing update traffic, using the bandwidth kilobits command.

By default, EIGRP metric equals bandwidth (slowest link) plus delay (sum of delays). • EIGRP metrics are backward-compatible with IGRP; the EIGRPequivalent metric is the IGRP metric multiplied by 256. © 2006 Cisco Systems, Inc. All rights reserved. © 2006 Cisco Systems, Inc. , for the sole use by Cisco employees for personal study. The files or printed representations may not be used in commercial training, and may not be distributed for purposes other than individual self-study. , for the sole use by Cisco employees for personal study.

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