Q1) What is mobile IPv6?
Answer: Mobile IPv6 (MIPv6) is a protocol developed as a subset of Internet Protocol version 6 (IPv6) to support mobile connections. MIPv6 is an update of the IETF (Internet Engineering Task Force) Mobile IP standard (RFC 2002) designed to authenticate mobile devices (known as mobile nodes) using IPv6 addresses.
This allows mobile devices to move from one network to another and still maintain existing connections. Although Mobile IPv6 is mainly targeted for mobile devices, it is equally applicable for wired environments
Q2) what is the motive of mobile ipv6?
Answer: The motive of ipv6 is to deal with the scaling problem due to the vast growth of the internet.
Ipv6 has 128_bit address field as opposed to the 32 bit of ipv4.ipv6 address do not have classes.the address space is subdivided in various ways based on the leading bits.the header format of ipv6 is simpler than ipv4 header it invites 4 bit version field, 8 bit field for traffic class,20 bit flow label in the first row of 32 bits there are 16 bit payload lenth,8 bit each for next header and ipvx limit that order.
Q3) what is the need of mobile Ipv6?
Ansewer: IPv6 is the next generation internet protocol. IPv4 has some problem so IPv6 is designed to enable high-performance, sclable internet.
Q4) Definition and terms that are used in mobile IPV6?
Answer: Home network
The home network of a mobile device is the network within which the device receives its identifying IP address (home address).
The home address of a mobile device is the IP address assigned to the device within its home network.
A foreign network is the network in which a mobile node is operating when away from its home network.
The care-of address of a mobile device is the network-native IP address of the device when operating in a foreign network.
A home agent is a router on a mobile node’s home network which tunnels datagrams for delivery to the mobile node when it is away from home. It maintains current location (IP address) information for the mobile node. It is used with one or more foreign agents.
A foreign agent is a router that stores information about mobile nodes visiting its network. Foreign agents also advertise care-of-addresses which are used by Mobile IP.
A binding is the association of the home address with a care-of address.
Q5) what are various IPv6 features that are needed by mobile IPv6?
Ans: Several terms and information are necessary to understand Mobile IPv6:
A foreign link defines a link that is not the mobile node s home link.
A Care-of address denotes an address that is used by the mobile node while it is attached to a foreign link. Whenever a mobile node moves from the home link to a foreign link, it is always (still) reachable by its home address, regardless of its location in IPv6 network.
Home address signifies that the mobile node is logically connected to the home link. Also, the association of a home address with a care-of address for a mobile node is known as a binding. Home agent is a router (on the home link) that maintains registrations of mobile nodes that are away from home and their current addresses. A Correspondent node is an IPv6 (not necessarily Mobile IPv6 capable) node that communicates with a mobile node.
Mobile IPv6 uses the IPv6 features such as address auto-configuration, Neighbor discovery and extension header for its operation.
It uses both types of auto-configuration such as stateless (Network prefix + interface ID) and stateful auto-configuration (DHCPv6).
Q6) Describe the operation of mobile IPv6?
Answer: When a mobile node is away from home, it sends information about its current location to the home agent. A node that wants to communicate with a mobile node uses the home address of the mobile node to send packets. The home agent intercepts these packets, and using a table, tunnels the packets to the mobile node’s care-of address.
Mobile IPv6 uses care-of address as source address in foreign links. Also, to support natural route optimization, the Correspondent node uses IPv6 routing header than the IP encapsulation. The following discussion makes Mobile IPv6 s understanding more clear by highlighting the benefit of Mobile IPv6 over mobile IPv4.
Q7) Compare IPV4 to IPV6
1) Adress are 32 bits(4 bytes)
2)Address resource records in the DNS to map host names to IPV4 addresses.
3)IPsec is optional and should be supported externally.
4)Broadcast addresses are used to send traffic to all nodes on a subnet.
5)IPV4 has only stateful configuration.
6)Header includes a checksum.
7)Header includes option.
1)Adress are 128 bits(16 bytes) in length
2)Address resource records in DNS to map host names to IPV address.
3)IPsec support in not optional.
4)IPV6 uses a link local scope all nodes multicast address.
5)IPV6 has both types of auto configuration.
6)Header does not include a checksum.
7)IPV^ uses a link local scope all nodes multicast address.
Q8) what are the changes that are made in IPv6 for Mobile IPv6?
Answer: 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
Q9)How is mip6 related to mobile ipv6?
Answer:Mobile IP6 (MIP6) specifies routing support which permits an IPv6
host to continue using its home address as it moves around the
Internet, enabling continuity of sessions. Mobile IPv6 supports
transparency above the IP layer, including maintenance of active
transport level sessions. The base specifications for Mobile IPv6
o RFC 3775
o RFC 3776
The primary goal of the MIP6 working group will be to enhance base
IPv6 mobility by continuing work on developments that are required for
wide-scale deployments. Additionally the working group will ensure
that any issues identified by implementation and interoperability
experience are addressed, and that the base specifications are
maintained. The group will also produce informational documentation,
such as design rationale documents or description of specific issues
within the protocol.
Q10) What are the advantages of mobile IPV6?
Answer:There are many advantage of ipv6:
1)Larger address space
2)Better header format
4)Possibility of Extension
7)IPV6 Provides more quality of service
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4 Responses to Mobile IPV6
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A good set of questions provided by the author for an interview process.
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Good stuff and very informative about IPV6.
Networking concepts need to brushed up and IPV4’s knowledge is recommended to understand this version.
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