lundi 3 octobre 2011
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IPV6 IN NOKIA
Ipv6 - Next Generation of Internet Protocol
IPv6 enables today's and tomorrow's IP technology, simplifying the hurdles faced in the development and deployment of new services. With its 128-bit address space, IPv6 increases the number of IP addresses available on phones, PDAs and other devices.
It also enhances peer-to-peer applications by providing globally unique IP addresses to each user, eliminating the need for Network Address Translation (NAT) to manage address spaces. It also features security extensions, option headers and flow labels, which simplify the deployment of existing services and the development of new services.
Nokia Support for IPv6
Nokia is a leader and active participant in the development of IPv6 specifications through the IPv6 working group in the IETF (Internet Engineering Task Force). Nokia leverages its expertise in IPv6 to develop key products. It's one of the few companies to deploy both IPv6 routing and security appliances.
Nokia IP Security Platforms and Nokia IPSO operating system software have supported IPv6 routing capabilities. Nokia IP Security Appliances also support multicasting for efficient routing capabilities. In 2003 Nokia introduced the industry's first IPv4/IPv6 dual stack CDMA mobile phone.
With Nokia IPSO 3.7 and Check Point Next Generation with Application Intelligence, Nokia security appliances are some of the first IPv6-ready firewall appliances. Nokia's IPv6 firewall capabilities provide customers with a single appliance for IPv6 routing and firewall security. Because Nokia security appliances support dual stack IPv4/IPv6 firewalls and IPv6 to IPv4 tunneling, customers can deploy IPv6 networks in conjunction with the existing IPv4 network
Mobile IPv6 is a version of Mobile IP - a network layer IP standard used by electronic devices to exchange data across a packet switched internetwork. Mobile IPv6 allows an IPv6 node to be mobile—to arbitrarily change its location on an IPv6 network—and still maintain existing connections.
Limitations of "fixed" IPv6
When an IPv6 node changes its location, it might also change its link. When an IPv6 node changes its link, its IPv6 address might also change in order to maintain connectivity.
There are mechanisms to allow for the change in addresses when moving to a different link, such as stateful and stateless address autoconfiguration for IPv6.
However, when the address changes, the existing connections of the mobile node that are using the address assigned from the previously connected link cannot be maintained and are ungracefully terminated
Benefits of Mobile IPv6
1.The key benefit of Mobile IPv6 is that even though the mobile node changes locations and addresses, the existing connections through which the mobile node is communicating are maintained.
2.To accomplish this, connections to mobile nodes are made with a specific address that is always assigned to the mobile node, and through which the mobile node is always reachable.
3.Mobile IPv6 provides Transport layer connection survivability when a node moves from one link to another by performing address maintenance for mobile nodes at the Internet layer
4.Changes from IPv6 to Mobile IPv6
A set of mobility options to include in mobility messages
A new Home Address option for the Destination Options header
A new Type 2 Routing header
New Internet Control Message Protocol for IPv6 (ICMPv6) messages to discover the set of home agents and to obtain the prefix of the home link
Changes to router discovery messages and options and additional Neighbor Discovery options
IPv6 enables today's and tomorrow's IP technology, simplifying the hurdles faced in the development and deployment of new services. With its 128-bit address space, IPv6 increases the number of IP addresses available on phones, PDAs and other devices.
It also enhances peer-to-peer applications by providing globally unique IP addresses to each user, eliminating the need for Network Address Translation (NAT) to manage address spaces. It also features security extensions, option headers and flow labels, which simplify the deployment of existing services and the development of new services.
Nokia Support for IPv6
Nokia is a leader and active participant in the development of IPv6 specifications through the IPv6 working group in the IETF (Internet Engineering Task Force). Nokia leverages its expertise in IPv6 to develop key products. It's one of the few companies to deploy both IPv6 routing and security appliances.
Nokia IP Security Platforms and Nokia IPSO operating system software have supported IPv6 routing capabilities. Nokia IP Security Appliances also support multicasting for efficient routing capabilities. In 2003 Nokia introduced the industry's first IPv4/IPv6 dual stack CDMA mobile phone.
With Nokia IPSO 3.7 and Check Point Next Generation with Application Intelligence, Nokia security appliances are some of the first IPv6-ready firewall appliances. Nokia's IPv6 firewall capabilities provide customers with a single appliance for IPv6 routing and firewall security. Because Nokia security appliances support dual stack IPv4/IPv6 firewalls and IPv6 to IPv4 tunneling, customers can deploy IPv6 networks in conjunction with the existing IPv4 network
Mobile IPv6 is a version of Mobile IP - a network layer IP standard used by electronic devices to exchange data across a packet switched internetwork. Mobile IPv6 allows an IPv6 node to be mobile—to arbitrarily change its location on an IPv6 network—and still maintain existing connections.
Limitations of "fixed" IPv6
When an IPv6 node changes its location, it might also change its link. When an IPv6 node changes its link, its IPv6 address might also change in order to maintain connectivity.
There are mechanisms to allow for the change in addresses when moving to a different link, such as stateful and stateless address autoconfiguration for IPv6.
However, when the address changes, the existing connections of the mobile node that are using the address assigned from the previously connected link cannot be maintained and are ungracefully terminated
Benefits of Mobile IPv6
1.The key benefit of Mobile IPv6 is that even though the mobile node changes locations and addresses, the existing connections through which the mobile node is communicating are maintained.
2.To accomplish this, connections to mobile nodes are made with a specific address that is always assigned to the mobile node, and through which the mobile node is always reachable.
3.Mobile IPv6 provides Transport layer connection survivability when a node moves from one link to another by performing address maintenance for mobile nodes at the Internet layer
4.Changes from IPv6 to Mobile IPv6
A set of mobility options to include in mobility messages
A new Home Address option for the Destination Options header
A new Type 2 Routing header
New Internet Control Message Protocol for IPv6 (ICMPv6) messages to discover the set of home agents and to obtain the prefix of the home link
Changes to router discovery messages and options and additional Neighbor Discovery options
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