Presentation_ID 3 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential IPv4 Issues The Need for IPv6 IPv6 is designed to be the successor to IPv4. Depletion of IPv4 address space has been the motivating factor for moving to IPv6. Projections show that all five RIRs will run out of IPv4 addresses between 2015 and With an increasing Internet population, a limited IPv4 address space, issues with NAT and an Internet of things, the time has come to begin the transition to IPv6! IPv4 has a theoretical maximum of 4.3 billion addresses, plus private addresses in combination with NAT. IPv6 larger 128-bit address space provides for 340 undecillion addresses. IPv6 fixes the limitations of IPv4 and includes additional enhancements, such as ICMPv6.
Source: © 2008 Cisco Systems, Inc. All rights reserved.Cisco ConfidentialPresentation_ID 1 IPv6 Introduction to Networks & Routing and Switching Essentials. – ppt download