mip_version1.1

8/13/2019 mip_version1.1

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Mobile IP

Presented by

Team : PegasusKishore Reddy YerramreddyJagannatha PochimireddySampath k BavipatiSpandana Nalluri

Vandana Goyal


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Agenda What is Mobile IP?

Mobile IP Architecture

Why Mobile IP? How Mobile IP Works

Registration Message Format

Tunneling in Mobile IP

Mobile IP in Action Security in Mobile IP

Mobile in IPv6

Conclusion


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What is Mobile IP

Definition:

Mobile IPis a standard communication protocol, defined to

allow mobile device users to move from one IP network to

another whi le maintain ing their permanent I P address[2]


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Mobile Node (MN) - A Node moving to different network, with permanent Home Address.

Home Agent(HA) - A routeron a mobile node's home network which tunnels datagrams for delivery to the mobile

node when it is away from home, and maintains current location information for the mobile node.

Home Address - The static fixed IP Address allocated to a mobile node by Home Agent.

Home Network - A network, having a network prefix/network id.matching that of a mobile node's home address

Foriegn Network - A network other than a Mobile nodes home network. Foreign Agent -Router in foreign network that provides CoAand tunneling with HAand forward the packets to MN.

Care-of Address - Termination point of a tunnel toward a MN in the foreign netwrok.

Mobility Binding -The association of a home address with a care-of address (CoA).

Correspondent Node (CN) - A peer node with which a Mobile node is communicating.

Mobile IP Architecture

Entities in Mobile IP

Home Agent (HA) Remote Agent(RA)

Correspondent node(CN)

Mobile node(MN)


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Router

Home Agent (HA)

Remote Agent (RA)

Correspondent node (CN)

Mobile node (MN)

Why Mobile IP ?

Mobi le Node moves to remote network

Packets for MN are dropped by theHome Agent as Mobile node is not

present in its network

CN is successfully communicating with MN via HA


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Why Mobile IP (Cont.)

Trends:

Peoples perspective of looking at internet has changed from ages,

with the introduction of Mobility.

Need: Increase in the variety of mobile devices, such as PDAs, laptops and

cellular phones, more and more internet services are accessible to

moving users with the widely deployed wireless networks.

Gene X: 3G Networks, Mobile IPV6


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How Mobile IP worksRegistration

1. Registration Request by MN to FA

2. FA Relays Registration request to HA

3. HA sends Registration reply to FA

4. FA Relays Registration reply to MN

FA

HAMN

12

34

Mobility Binding Table


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Registration message format

Register request Register response


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Foreign Agent(FA)

Home Agent (HA)

Mobile Node (MN)

MN moves to FA

CN sends packets to HA

HA tunnels the

Packet and sends to FA

FA extracts original

Packet and sends to the MN

IP-in-IP or GRE tunnel

between HA and FA

Tunneling in Mobile IP


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Tunneling in Mobile IP(Cont.)

When CN sends the data to MN, it uses the original address of the MN, so thepacket goes to HA.

From the mobility binding HA encapsulates the packet (IP-in-IP or GRE) andsends to CoA.

The FA de-capsulate the packet and extracts the original packet that was sentby the CN.

The FA then sends this packet to the MN using the Home address destination.

The reverse route from MN to CN may or may not follow this path.

Triangle routingReply packets are sent directly to CN from MN

Reverse TunnelingReply packet are tunneled to HA by FA.


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Home Agent(HA)

Remote Agent (RA)


Mobile node(MN)

Mobile IP in Action

Mobi le Node moves to remote network

1.MNsendsRegistrat ion request wi th i ts new CoA

3.MNsendsRegistrat ion response, after val idating reques t and

updat ing binding table4.Packets s ent toMNf romCNare tunneled toRA using b ind ing table

Home Address Care-of-Address

A B

Mobility Binding table

2.Mobi le binding created for MN w ith new CoA

CN is successfully communicating with MN via HA

HA Looks binding table

Home Address = A

CoA = B


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Security in Mobile IP Required as Mobile Nodes are often in unprotectedremote network

Authenticityand Integrityof Registration messages usingAuthentication (e.g. HMAC-MD5).

Replay attackprotection for Registration messages using sequencenumber.

Security Issues in Mobile IP

Issue Protocol Solution

Optionalauthentication between MN and FA IPv4 AAA and Broker AAAservices

Location Privacy IPv4,IPv6 None

Confidentiality for Data Packets IPv4,IPv6 IPSec or SSL


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Security in Mobile IP (Cont.)Mobile IP with AAA (e.g. RADIUS)

Remote AAA

Home Agent(HA)

Remote Agent(RA)

Mobile node(MN)

Broker AAA

Home AAA

1

2

3

4

5 6

7

8

9

10

Registration Request

Registration Response


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Security in Mobile IP (Cont.)

Home Agent(HA) Remote Agent(RA)


Mobile node(MN)

Mobile IP Tunnel(IP-in-IP or GRE)

IPSec Tunnel

IPSec for Data Confidentiality


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Mobile IP in IPv6 Conceptually same as MIPv4

Inbuilt support using specific extensions for mobile IP

Route optimization using new type of routing header

Triangle routing problem solved using new destination header option

Mobility Header to exchange binding messages ( e.g. Registration)

Better security using IPSec extensions for binding messages


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References

1. IP Mobility Support for IPv4; RFC 3344, Perkins, Charlie;

http://www.ietf.org/rfc/rfc3344.txt

2. Wikipedia : http://en.wikipedia.org/wiki/Mobile_IP

3. Mobility Support in IPv6; RFC 3775; http://www.ietf.org/rfc/rfc3775.txt4. TCP/IP Tutorial and Technical Overview, IBM Redbooks

5. http://www.cisco.com/en/US/tech/tk827/tk369/technologies_white_paper09186a0080

0c9906.shtml

6. http://www.isoc.org/inet2001/CD_proceedings/T40/inet_T40.htm
http://www.ietf.org/rfc/rfc3344.txthttp://en.wikipedia.org/wiki/Mobile_IPhttp://www.ietf.org/rfc/rfc3775.txthttp://www.cisco.com/en/US/tech/tk827/tk369/technologies_white_paper09186a00800c9906.shtmlhttp://www.cisco.com/en/US/tech/tk827/tk369/technologies_white_paper09186a00800c9906.shtmlhttp://www.isoc.org/inet2001/CD_proceedings/T40/inet_T40.htmhttp://www.isoc.org/inet2001/CD_proceedings/T40/inet_T40.htmhttp://www.cisco.com/en/US/tech/tk827/tk369/technologies_white_paper09186a00800c9906.shtmlhttp://www.cisco.com/en/US/tech/tk827/tk369/technologies_white_paper09186a00800c9906.shtmlhttp://www.ietf.org/rfc/rfc3775.txthttp://en.wikipedia.org/wiki/Mobile_IPhttp://www.ietf.org/rfc/rfc3344.txt


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Thank You


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