MOBILE IP. Under the guidance of Mr. N. Srinivasu

Transcription

1 MOBILE IP Under the guidance of Mr. N. Srinivasu (Lecturer Of Electronics & Communication) Jiten Mishra By EC [1]

2 128 bit address. Features of IPv6 Address Auto configuration An IPv6 node configurs it address automatically by using the router advertisements and it s interface id. Extension Headers Routing header For route optimization Destination Options header For mobile node originated datagrams [2]

3 Mobile Node Mobile IPv6 Terminology The node which moves between the networks. Home Agent The node in the Home network which knows the information(like current location...etc) about the mobile node s, which belongs to that network. Correspondent Node Any node which contacts the Mobile node. [3]

4 Mobile IPv6 Terminology (Continued) Home Address Address of the Mobile Node in the Home Network Care-of Address Addess of the Mobile Node in the Foreign network Home Link The link on which a mobile node's home subnet prefix is defined. Standard IP routing mechanisms will deliver packets destined for a mobile node's home address to its home link. [4]

5 Foreign Link Binding Any link other than the mobile node's home link. The association of the home address of amobile node with a care-of address for that mobile node. [5]

6 Mobile IPv6 Operation Mobile IPv6 operation can be divided in to 3 parts Discovering the care-of address Registering the care-of address Tunneling to the care-of address [6]

7 Mobile IPv6 Operation (cont...) Discovering the care-of address A Mobile Node(MN) performs address autoconfiguration to get its care-of address Resistsering the care-of address 1. The MN registers its care-of address with its home agent by sending a Binding Update request to it s Home Agent (HA) 2. HA sedns a Binding Acknowledgement to the corresponding mobile node. [7]

8 Mobile IPv6 basic operation Correspondent Node <Correspondent Address> Route optimization Routing option <correspondent address> <-> <home address> l <Care-Of Address> IP enntu Mobile Node <Home Address> Mobile Node Bidirectional tunnelling <Home Address> Home Agent [8]

9 Mobile IPv6 address updates Mobile Node needs to update the Home Agent on it s current location Binding Update message The Home Agent keeps this binding for future use Mobile Node Mobile Node Home Agent Binding Update Ack [9]

10 Triangle Routing [10]

11 Route Optimization MN may bind BU in pkts to CN, allowing CN to directly send pkts to MN CN receive a pkt with BU in it, then update its Binding Cache Just like any IPv6 node, every time it attempt to sent pkts, it check its Binding Cache: If there is an entry with CoA of the destination, use the CoA Otherwise, use the origin address [11]

12 Route Optimization [12]

13 Movement Detection While away from home, an MN selects one router and one subnet prefix advertised by that router to use as the subnet prefix in its primary care-of address To wait for the periodically sent Router Advertisements [13]

14 Dynamic Home Agent Address Discovery It is possible that when the mobile node needs to send a Binding Update to its home agent to register its new primary care-of address, the mobile node may not know the address of any router on its home link that can serve as a home agent for it. ICMP Home Agent Address Discovery Request message ICMP Home Agent Address Discovery Reply message [14]

15 Larger Preference value indicate higher availability of the home agent (1)Binding Update to Home-Agents anycast address (2)Binding Acknowledgement including the Home Agents List; rejects the registration request Home Agent 1 工作站 Home Link Link A 工作站 Home Agent 2 工作站 路由器 Router Internet Home Agent 3 Home Agents List Preference Value 電腦 Home Agent 3 9 Home Agent 1 2 Correspondent Node Home Agent 2-3 路由器 Router 路由器 Router Mobile Node 筆記型電腦 Link B Link C [15]

16 Conclusions Mobile IPv6 is An efficient protocol for handling mobility with IPv6 To minimize the control traffic needed to effect mobility [16]

17 THANK YOU [17]