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.
Presentation_ID 3 © 2008 Cisco Systems, Inc. All rights reserved.Cisco Confidential IP Addressing Objectives At the end of this presentation, you will be able to: Explain the need for IPv6 addressing. Describe the representation of an IPv6 address. Describe types of IPv6 network addresses. Configure global unicast addresses. Describe multicast addresses. Describe the role of ICMP in an IP network (include IPv4 and IPv6).
2.1: Comparing the IPv4 and IPv6 Headers
DYNAMIC HOST CONFIGURATION PROTOCOL V4 DHCP
© 2006 Cisco Systems, Inc. All rights reserved.IP6FD v2.0—2-3 MTU = 1300 Path MTU Discovery MTU = 1500 MTU = 1400 Packet with MTU = 1500 ICMP error: packet too big Use MTU = 1400 Packet with MTU = 1400 ICMP error: packet too big Use MTU = 1300 Packet with MTU = 1300 Path MTU = 1300 SourceDestination
W&L Page 3 CCNA IP Addressing (IPv4/IPv6)