Giảng viên : Ts. Lê Anh Ngọc Học viên: Trịnh Hồng Điệp Nguyễn Minh H ư ớng 1

1. Introduction 2. Introduces IPv6 multihoming features 3. Requirements for IPv6 multihoming in NGN 4. Functional model of IPv6 multihoming in NGN 5. Describes applications of IPv6 multihoming for NGN. 6. Conclude 2

 What’s IPv6 multihoming? IPv6 multihoming is that one site (network) or one node has several network connections through either the same or different network service provider / multiple network interfaces / multiple network addresses. Sites and nodes choose to IPv6 multihoming for several reasons, especially to improve fault tolerance, performance load balancing, mobility support, etc. 3

4

IPv6 multihoming features are separated into site multihoming and host multihoming 5

 Site Multihoming 6

 Host Multihoming 7

Requirements for IPv6 multihoming feature are same requirements for both IPv4 multihoming are: - Redundancy - Load sharing - Performance - Policy - Simplicity - Impact on DNS - Packet filtering -Transport-layer survivability 8

Additional requirements for IPv6 multihoming are: - Scalability - Impact on routers - Impact hosts - Interaction between hosts and the routing system - Interaction between operation and management - Cooperation between transit providers - Cooperation between multiple solutions 9

 Network Model for IPv6 Multihoming in NGN 10

 The multihoming functionality could be considered in the different layers: network layer (IPv6) and transport layer (TCP/UDP/SCTP/DCCP). 11

Functional Model of IPv6 Multihoming in the Network Layer 12

Functional Model of IPv6 Multihoming in the Network Layer (tt)  Typical application areas of this IPv6 site multihoming include: - Traffic load sharing; for improvement of the utilization of network bandwidth; - Traffic engineering; for enhancement of the network utilization and for routing optimization. 13

Functional Model of IPv6 Multihoming in the Network Layer (tt) 14

Functional Model of IPv6 Multihoming in the Network Layer (tt)  Typical application areas of this IPv6 host multihoming include: - Traffic load sharing: for improvement of the utilization of; link bandwidth assigned to the host; - Fault tolerance with redundancy: to recover the host connection from the network failure 15

Functional Model of IPv6 Multihoming in the Transport Layer 16

Functional Model of IPv6 Multihoming in the Transport Layer (tt)  Typical application areas of this IPv6 transport layer multihoming include: - Fault tolerance with redundancy: to recover the host connection from the network failure - Session continuity across different access networks: to support the seamless handover. 17

 Fault Tolerance To support end-to-end QoS and reliable communications, it is important to provide fault tolerance by redundancy and other mechanisms. By IPv6 multihoming, NGN can be guaranteed that network connections are redundant. 18

 QoS and Load Sharing With mutiple ornetion betweecore network and access networks or between access networks and mobile objects by IP6 multihoming, the path of data traffic can be diverse. With proper policy, NGN can be guaranteed that data traffic is transmitted as load sharing 19

 Mobility Support In NGN environments, the technologies of access networks are various and heterogeneous. In thissituation, IPv6 multihoming can be used for mobility management because it originally considers multiple IPv6 addresses and multiple network interfaces. 20

 IPv6 multihon oeocracteritcofnevtis that one site or one node has several network conenections through either the same or different network service provide / multiple network interface / Multiple network address  In multiple access technologies and heterogeneous access networks, each access network should have multiple network connections to the core network and mobile object should have multiple network connections to the access network 21

22