Does IPv6 abandon TCP/IP fragmentation?

Digg This!     StumbleUpon     Del.icio.us

RELATED CONTENT IPv4 and IPv6 Where is expert Silvia Hagen's most recent IPv6 and IPv4 advice? How does IPv6 benefit current and future applications? What does node-local mean in IPv6 in terms of multicast scope? How do you calculate ROI costs for an IPv6 implementation/migration? What is the difference between packet fragmentation in IPv4 and IPv6? Calculating subnets for IP addresses in IPv6 How to calculate subnet masks in IPv6 IP addressing in IPv6 How does IPv6 subnetting work in LAN and VLAN network design? In IPv4, do private address ranges have a default subnet mask? IP Networking What is the definition of ATM (Asynchronous Transfer Mode)? Do I have to disable DHCP on my router to create a DHCP server? Windows Server 2008 IP routing configuration: Static and dynamic RIPv2 What is IP? Connect your LAN to the Internet using static or dynamic NAT Using tracert and TTL to troubleshoot network connectivity problems Test your TCP/IP protocol stack to troubleshoot network connectivity IP addressing and subnetting explained Checking IP configuration to troubleshoot Windows network connectivity VLANs versus IP subnets: Why use a VLAN over IP subnetting?

RELATED GLOSSARY TERMS Terms from Whatis.com − the technology online dictionary 32-bit IP addressing  (SearchNetworking.com) fixed-length subnet mask  (SearchNetworking.com) GARP (Generic Attribute Registration Protocol)  (SearchNetworking.com) Port Address Translation (PAT)  (SearchNetworking.com) route aggregation  (SearchNetworking.com) route summarization  (SearchNetworking.com) subnet  (SearchNetworking.com) subnet mask  (SearchNetworking.com) variable-length subnet mask  (SearchNetworking.com) wildcard mask  (SearchNetworking.com)

RELATED RESOURCES 2020software.com, trial software downloads for accounting software, ERP software, CRM software and business software systems Search Bitpipe.com for the latest white papers and business webcasts Whatis.com, the online computer dictionary

IPv6 does not abandon fragmentation at all. What's new is that IPv6 routers do not fragment anymore. Fragmentation must be done by the source host. It will find the optimal packet size by trying the largest possible first and then reduce the packet size if it gets "packet too big" ICMPv6 messages from routers. These messages include the maximum packet size for the next hop. This was done so that routers are efficient in forwarding packets and don't need to deal with fragmentation jobs.

For more information, read my response on IPv4 and IPv6 fragment reassembly in routers. Hope this helps.