1 Anycast Address Assignment Using DHCPv6 draft-madanapalli-dhcpv6-anycast-00 Syam Madanapalli Samsung ISO IETF 61 – Washington, DC

2 Agenda Background & Motivation Background & Motivation Summary of the Draft Summary of the Draft How It Works How It Works Anycast Address Assignment Option Anycast Address Assignment Option Service Discovery Option Service Discovery Option Comments & Questions Comments & Questions

3 Background & Motivation… Currently the DHCPv6 defines the following options for different kinds of address assignments Currently the DHCPv6 defines the following options for different kinds of address assignments IA_NA – Permanent Unicast Addresses IA_NA – Permanent Unicast Addresses IA_TA – Temporary Unicast Addresses IA_TA – Temporary Unicast Addresses IA_MA – Multicast Addresses IA_MA – Multicast Addresses IPv6 has another type of address IPv6 has another type of address Anycast Address Anycast Address Expected to have wide scope of usability Expected to have wide scope of usability New BoF is planned in IETF to work on Anycasting in IPv6 New BoF is planned in IETF to work on Anycasting in IPv6

4 Background & Motivation There exist no method for Assigning the Service Oriented Addresses There exist no method for Assigning the Service Oriented Addresses Anycast Addresses/Shared Unicast Addresses Anycast Addresses/Shared Unicast Addresses Service-oriented/Well-known Unicast Addresses Service-oriented/Well-known Unicast Addresses Anycast Servers are need to explicitly configured to know that it is an Anycast Address Anycast Servers are need to explicitly configured to know that it is an Anycast Address So that it will not use the Anycast Address as the Source Address So that it will not use the Anycast Address as the Source Address

5 Summary of the draft Provides a way for Service-Oriented Address Assignment Provides a way for Service-Oriented Address Assignment Anycast Addresses Anycast Addresses Shared Unicast Addresses Shared Unicast Addresses Service-oriented/Well-known Unicast Addresses Service-oriented/Well-known Unicast Addresses Similar to other types of address assignments Similar to other types of address assignments But here the address assignment is for a Service But here the address assignment is for a Service Introduces a new name space – Service Type Introduces a new name space – Service Type DNS Server, SIP Servers, Web Servers, Tunnel Servers etc. DNS Server, SIP Servers, Web Servers, Tunnel Servers etc.

6 How It Works DHCPv6 Server DNS Server Solicit (AA Option) Reply (Anycast Address) Solicit (AA Option) Reply (Anycast Address) Information Request (DNS Server) Reply (DNS Server Address)

7 Anycast Address Assignment Option IAID identifies this IA IAID identifies this IA This name space different from IA_NA and IA_TA This name space different from IA_NA and IA_TA Service Type Service Type The type of the service that the server provides The type of the service that the server provides A – Flag A – Flag Indicates if it is an Anycast Address Indicates if it is an Anycast Address IA_AA Options IA_AA Options IA Address Options carrying the addresses for this Service Type IA Address Options carrying the addresses for this Service Type 031 IA_AA Options OPTION_IA_AA IAID (4 octets) Option Length T1 T2 Service TypeAReserved

8 Service Discovery Option OPTION_SRVC_DSCVRY OPTION_SRVC_DSCVRY One Option for all types of Servers (?) One Option for all types of Servers (?) Service Type Service Type The type of the service that the client trying to discover The type of the service that the client trying to discover OPTION_SRVC_DSCVRY Options OPTION_SRVC_DSCVRY Options IA Address Options carrying the addresses for the Service Type IA Address Options carrying the addresses for the Service Type 031 OPTION_SRVC_DSCVRYOption Length Service TypeReserved OPTION_SRVC_DSCVRY Options

9 Questions & Comments

10 Thank You