En Mobile Ip

8/14/2019 En Mobile Ip

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Mobile IP

Jiten Mishra (EC200117327)

MOBILE IP

Under the guidance of

Mr. N. Srinivasu

ByJiten Mishra EC200117327

(Lecturer Of Electronics & Communication)


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Features of IPv6

128 bit address. Address Auto configuration

An IPv6 node configurs it address automatically by using the router

advertisements and its interface id.

Extension Headers Routing header

For route optimization

Destination Options header

For mobile node originated datagrams


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Mobile IPv6 TerminologyMobile Node

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 nodes,

which belongs to that network.

Correspondent Node

Any node which contacts the Mobile node.


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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 prefixis defined. Standard IP routing mechanisms will deliver

packets destined for a mobile node's home address to its home

link.


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Foreign Link

Any link other than the mobile node's home link.

Binding

The association of the home address of amobile node

with a care-of address for that mobile node.


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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


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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 address1. The MN registers its care-of address with its home agent

by sending a Binding Update request to its Home Agent

(HA)

2. HA sedns a Binding Acknowledgement to the

corresponding mobile node.


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Mobile IPv6 basic operationCorrespondent Node

Mobile Node

Bidirectional

tunnellingRoute

optimization

IPtunnel

Mobile Node

Routingoption

Home Agent


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Mobile IPv6 address updates

Mobile Node

Home Agent

Binding Update Ack

Mobile Node needs to update the Home Agent on itscurrent location

Binding Update message

The Home Agent keeps this binding for future use

Mobile Node


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Triangle Routing


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Mobile IP


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


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Route Optimization


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While away from home, an MN selects onerouter and one subnet prefix advertised by thatrouter to use as the subnet prefix in its primarycare-of address

To wait for the periodically sent RouterAdvertisements

Movement Detection


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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 routeron its home link that can serve as a

home agent for it.

ICMP Home AgentAddress Discovery Request

message

ICMP Home Agent Address Discovery Reply message


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Internet

Home Agent 3

Correspondent Node

Mobile Node

Router

Router

Router

Home Link

Link A

Link B

Link C

(1)Binding Update to Home-Agents anycast address(2)Binding Acknowledgement including the Home Agents List;

rejects the registration request

Home Agent 1 Home Agent

2

Home Agents List Preference ValueHome Agent 3 9Home Agent 1 2Home Agent 2 -3

Larger Preference value indicate higher availability of

the home agent


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Conclusions Mobile IPv6 is

An efficient protocol for handling mobility with

IPv6

To minimize the control traffic needed to effect

mobility


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THANK YOU

En Mobile Ip

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