1. User Network Interface - auto-configuration mechanism -
Toshi Yamasaki
IPv6 Operation Study Group /
NTT Communications

2. Goal
IPv6 access services for everyone (non-technical customers) in 2002
ex) DSL, FTTH, D-up, CATV, etc.
Make a rough consensus for “what are minimum requirements for ISP-to-Customer auto-configuration?”
No absolute conclusion, but need a current conclusion to start businesses

3. Scope ISP-to-Customer Environment PE-to-CPE Interface
CPE-to-Host Interface
ISP
Here
Here
POI
Service PE
CPE
Host
access media
LAN

4. Auto-configured Parameters
Site Address Prefix / Host Address
DNS Cache Address

5. Typical model in IPv4 world
POI
ISP
Service PE
CPE
Host
access media
LAN
Primary DNS
Secondary DNS
Physical
NAS
PSTN/DSL
L3Router
Ethernet PC
Scope of
Address
Global
Global
Private
Private
Site Address /
Host Address }
IPCP
DHCP
DNS Cache
Address

6. Challenges for IPv6 world...
universality
should be applicable for various medias
shouldn’t assume PPP(IPv6CP)
“third-party-serverless” auto-configuration
should be auto-configured by the service entity itself, only when it is alive
Site-Prefix by who provide the routing service for the prefix, DNS Cache Address by who provide DNS Cache service
non-PC
Hosts are not always powerful
no heavy requirements

7. Our Current Conclusion...

8. Logical model CPE CPE L3R model Host PE ISP Service Host MSR model
POI PE
CPE
subnet
Host
L3R model
subnet
ISP
Service
POI
subnet
CPE
Host
MSR model
CPE
Subnet
Site Prefix
etc
L3R Model
L3 Router
leaf subnets
/48, /64 -
MSR Model
Multilink-subnet Router
one subnet
/64
For residential customers?

9. Site model Host PE CPE L3R model-A ISP Host CPE L3R model-B Service
Customer site
subnet
Host PE
subnet
CPE
L3R model-A
ISP site
ISP
Host
subnet
CPE
subnet
L3R model-B
Service
Host
subnet
CPE
MSR model-A
Host
subnet
CPE
MSR model-B
SHOULD-BE model is Model-A
Usually ISP doesn’t assign nor route site-local addresses, especially well-known addresses, to customer nodes

10. Site Prefix / Host Address (L3R)PE
CPE
Host
Standard Status
Draft Standard (RFC2461)
Implementation
- Many!
Alternatives
None
subnet
subnet
Scope of
Address
Link
Local
Link
Local
Global
Global
APD RA
Site Address /
Host Address
Standard Status
Draft Standard (RFC2462)
Implementation
- Many!
Alternatives
Privacy extension (RFC3041)
DHCPv6 (draft-ietf-dhc-dhcpv6-23.txt )
Stateless
Standard Status
I-D (draft-haberman-ipngwg-auto-prefix-01.txt, -02.txt)
Implementation
- KAME(PE, CPE), YAMAHA(PE, CPE)
Alternatives
Router Renumbering (RFC2894)
a new DHCPv6 option proposed after our last discussion (draft-troan-dhcpv6-opt-prefix-delegation-00.txt )

11. DNS Cache Address (L3R) Host Service PE CPE SHOULD-BE model is Model-A
subnet
subnet
ISP site
Customer site
Model-A
Level1 Compliance
Proxy
Level1
Standard Status
I-D (draft-ietf-ipngwg-dns-discovery-03.txt )
Implementation
- KAME
Alternatives
Level2 (draft-ietf-ipngwg-dns-discovery-03.txt )
DHCPv6 information request (draft-ietf-dhc-dhcpv6-23.txt )
ISP site
Model-B
Level1 Compliance
SHOULD-BE model is Model-A
CPE, only the node belongs to both sites, must work as a DNS proxy

12. Site Prefix / Host Address (MSR)PE
CPE
Host
Standard Status
Draft Standard (RFC2461)
Implementation
- Many!
Alternatives
None
subnet
subnet
Scope of
Address
Link
Local
Global RA
Site Address /
Host Address
Standard Status
Draft Standard (RFC2462)
Implementation
- Many!
Alternatives
Privacy extension (RFC3041)
DHCPv6 (draft-ietf-dhc-dhcpv6-23.txt )
Stateless

13. DNS Cache Address (MSR)
Host
Service PE
CPE
subnet
ISP site
Customer site
Model-A
Level1
Proxy
Level1 Compliance
Standard Status
I-D (draft-ietf-ipngwg-dns-discovery-03.txt )
Implementation
- KAME
Alternatives
Level2 (draft-ietf-ipngwg-dns-discovery-03.txt )
DHCPv6 information request (draft-ietf-dhc-dhcpv6-23.txt )
ISP site
Model-B
Level1 Compliance
SHOULD-BE model is Model-A
PE, only the node belongs to both sites, must work as a DNS proxy

14. TBD
Name Registration Mechanism
Monitoring Issues
Security Issues

15. backups

16. Level1 Compliance Details
Level1 response
dest : global unicast
src : global or site-local unicast
response
srct : site-local
dest : global
Level1 query
dest : site-local anycast
src : global unicast
level1 query
dest : site-local
src : global
POI
CPE
Host
model-B
ISP
DNS
Cache PE
Server
POI X
CPE
Host
model-A
Level1 response (failure)
dest : site-local(Customer) unicast NO ROUTE!
src : global or site-local(ISP) unicast
Level1 query
dest : site-local(ISP) anycast
src : site-local(Customer) unicast

17. DNS Cache at Customer site
Level1 query
dest : site-local anycast
src : global or site-local unicast
DNS
Cache
Level1 response
dest : global or site-local unicast
srct : global or site-local unicast
POI
CPE
Host
model-B
ISP PE
Server
POI
CPE
Host
model-A