# IPv6 and Packet Tracer

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IPv6 and Packet TracerJim Bergquist [email protected] Lakes Country Service CooperativeKaren Alderson [email protected] Academy Technical Advocacy

Visualizing the IPv6 Address SpaceIPv6 & Packet Tracer# 2009 Cisco Systems, Inc. All rights reserved.Cisco PublicEarth drawing credit: http://flickr.com/photos/ontdesign/http://search.creativecommons.org/ Visualizing the IPv6 Address SpaceAssign one IPv6 address per grain of sandHow many grains of sand would be needed to use all IPv6 addresses?Fill Earth-sized containers with the sand128 bit addresses2 128 is a very large number

Fill hereHollowEarth-sizedcontainerIPv6 address2009:1:3:4EFF:2C:16BA:3D:B012/112SandGrain IPv6 & Packet Tracer# 2009 Cisco Systems, Inc. All rights reserved.Cisco Public4If you assigned one IPv6 address to a grain of sand, how many grains of sand would be needed to use all possible IPv6 address numbers?Start by filling an Earth-sized container 2006, Cisco Systems, Inc. All rights reserved.IPv6 & Packet Tracer.scrVisualizing the IPv6 Address SpaceThe Earth-sized containers would make 20 circles around the outer orbit of our solar system (Pluto)

Our Solar System

Blue dots are Earth- sized containers

Based on image from public image gallery at http://www.eso.org/ IPv6 & Packet Tracer# 2009 Cisco Systems, Inc. All rights reserved.Cisco Public5We would need enough Earth-sized containers to circle our Solar system 50 times at its outer diameter, which is Plutos orbit. If you would like to see the calculation, email [email protected] size of sand grains vary. So the calculation results in 20 to 50 times around the Earth at Plutos orbit 2006, Cisco Systems, Inc. All rights reserved.IPv6 & Packet Tracer.scr

IPv6 & Packet Tracer# 2009 Cisco Systems, Inc. All rights reserved.Cisco Public13To focus on the material we need for Packet Tracer labs, we will work only with unicast addresses in this session.

Designers of IPv6 addressed known vulnerabilities of IPv4. One of those known vulnerabilities is broadcast storms. If you eliminate the use of broadcast addresses, then you eliminate the possibility of broadcast storms.

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