Anycast Address Assignment Using DHCPv 6 draft-madanapalli-dhcpv 6

Anycast Address Assignment Using DHCPv 6 draft-madanapalli-dhcpv 6 -anycast-00 Syam Madanapalli Samsung ISO IETF 61 – Washington, DC 1

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

Background & Motivation… n Currently the DHCPv 6 defines the following options for different kinds of address assignments n n IPv 6 has another type of address n n n IA_NA – Permanent Unicast Addresses IA_TA – Temporary Unicast Addresses IA_MA – Multicast Addresses Anycast Address Expected to have wide scope of usability New Bo. F is planned in IETF to work on Anycasting in IPv 6 3

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

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

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

Anycast Address Assignment Option 0 31 OPTION_IA_AA Option Length IAID (4 octets) Service Type A Reserved T 1 T 2 IA_AA Options n IAID identifies this IA n n Service Type n n The type of the service that the server provides A – Flag n n This name space different from IA_NA and IA_TA Indicates if it is an Anycast Address IA_AA Options n IA Address Options carrying the addresses for this Service Type 7

Service Discovery Option 0 31 OPTION_SRVC_DSCVRY Option Length Service Type Reserved OPTION_SRVC_DSCVRY Options n OPTION_SRVC_DSCVRY n n Service Type n n One Option for all types of Servers (? ) The type of the service that the client trying to discover OPTION_SRVC_DSCVRY Options n IA Address Options carrying the addresses for the Service Type 8

Questions & Comments 9

Thank You 10