The use of extension headers with IPv6 to carry options (that are carried in the basic IP header with IPv4) makes IPv6 much more flexible for mobile communication. Some of the extension headers are used to optimize routing in a mobile environment. So for instance, when a host wants to roam from network to network without loosing its TCP connections, it will use mobile IP to do so. It then uses a home agent in its home network that will hold its TCP connections on its behalf while the mobile node is roaming. With IPv4 therefore, all communications from the mobile node with any service it is connected to will always go through its home agent. With IPv6, by using extension headers, if the mobile node is in a remote network connecting to a service in another network, it can, after a few initial packets through its home agent, route packets to the service directly, thereby optimizing the route. In the future, when we have to expect large numbers of mobile users roaming about using mobile IP, the old IPv4 scenario would create a heavy bottleneck at the home agent as all traffic from all mobile nodes of its network would be routed through that home agent.
Other features that will be very helpful in mobile networks are the much more flexible address space and above all the autoconfiguration possibilities IPv6 offers.
what are the draw backs of mobile ipv6
what is the commercial use of ipv6?
32 bits (for IPv4), or 128 bits (for IPv6).32 bits (for IPv4), or 128 bits (for IPv6).32 bits (for IPv4), or 128 bits (for IPv6).32 bits (for IPv4), or 128 bits (for IPv6).
Short answer - yes.You need to be running Service Pack 1 at a minimum.Service Pack 2 has an even more complete IPv6 stack.To enable IPv6 on XP, open a command prompt window and type:C:\> ipv6 /?Did you then see this result?:C:\> ipv6 /?Could not access IPv6 protocol stack - the stack is not installed.To install, please use 'ipv6 install'.If you did get the above result, simply type:C:\> ipv6 installIt will take a few seconds, and then your Windows XP system will be fully IPv6 enabled.
IPV6 is relatively new and doesn't work everywhere yet.
IN IPv6 we can find 128bits.
IPv6 uses a 128-bit address space
by unchecking the check box of IPv6 in local area network properties
IPv6 address has 2^128 address and IPv6 address is of 16 bytes and is represented in colon hex notation.
By configuring an IPv6 Unicast routing command on a router you are allowing the router to communicate with the IPv6 interface. This is needed if you intend to send or receive data over an IPv6 network.
ip6 can handle many more addresses than ip4 - allowing more people to join the Internet.
there are exactly340,282,366,920,938,463,463,374,607,431,768,211,456 ip address in the next generation internet protocol knows as IPv6 for more info visit: IPv6.com