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Stateless IPv4-IPv6 Interconnection for DS-lite and A+P Flexible IPv6 Migration Scenarios in the Context of IPv4 Address Shortage I-D.boucadair-behave-ipv6-portrange Stateless IPv4-IPv6 Interconnection in the Context of DS-lite Deployment I-D.boucadair-dslite-interco-v4v6

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stateless ipv4 ipv6 interconnection for ds lite and a p
Stateless IPv4-IPv6 Interconnection for DS-lite and A+P
  • Flexible IPv6 Migration Scenarios in the Context of IPv4 Address Shortage
    • I-D.boucadair-behave-ipv6-portrange
  • Stateless IPv4-IPv6 Interconnection in the Context of DS-lite Deployment
    • I-D.boucadair-dslite-interco-v4v6
  • Softwire WG IETF75 Stockholm
  • Pierre Levis, Mohamed Boucadair
  • pierre.levis@orange-ftgroup.com
  • mohamed.boucadair@orange-ftgroup.com
ipv6 context
IPv6 context
  • ISPs wishing to:
    • Migrate towards an IPv6-only network
    • Offer connectivity to the IPv6
    • Offer connectivity to the IPv4 Internet, saving their public address space
  • We present DS-lite and A+P (using a PRR1) solutions based on encapsulation1 Port Range Router
ds lite cgn and prr

IPv4Internet

DS-lite CGN and PRR

private @IPv4

no @IPv4no NAT

ds lite cgn and prr4

IPv4Internet

DS-lite CGN and PRR

private @IPv4

no @IPv4no NAT

private @IPv4

public @IPv4 port range (PR)

ipv4 internet connectivity with ipv6 in access only
IPv4 Internet Connectivitywith IPv6 in Access only

IPv4 Internet

ISP

IPv4

IPv6

DS-lite CGNPRR

CN

CPE

  • DS-lite CGN only
  • PRR only
  • DS-lite CGN and PRR

CPE: Customer Premises Equipment

CN: Correspondent Node

ipv6 internet connectivity
IPv6 Internet Connectivity

IPv6 Internet

ISP

IPv6

CN

CPE

CPE: Customer Premises Equipment

CN: Correspondent Node

a voluntary migration towards ipv6
A voluntary migration towards IPv6

IPv4 or IPv6 Internet

ISP

IPv6-Only

CN

CPE

CPE: Customer Premises Equipment

CN: Correspondent Node

ipv4 internet connectivity with ipv6 in access and core
IPv4 Internet Connectivitywith IPv6 in Access and Core

IPv4 Internet

ISP

IPv6

IPv4

IPv6

DS-lite CGNPRR

CN

CPE

ipv4 internet connectivity with ipv6 in access and core9
IPv4 Internet Connectivitywith IPv6 in Access and Core

IPv4 Internet

ISP

IPv6

IPv4

IPv6

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

ICXF: Interconnection Function

from cpe to cn
From CPE to CN

IPv4 Internet

ISP

IPv6

IPv4

IPv6

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

from cpe to cn11
From CPE to CN
  • IPv6 Conf:
  • IPv6Pref (e.g. /56)
  • @IPv6 of DS-lite CGN / PRR

IPv4 Internet

ISP

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

from cpe to cn12
From CPE to CN
  • IPv6 Conf:
  • IPv6Pref (e.g. /56)
  • @IPv6 of DS-lite CGN / PRR

IPv4 Internet

ISP

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Encap

from cpe to cn13
From CPE to CN
  • IPv6 Conf:
  • IPv6Pref (e.g. /56)
  • @IPv6 of DS-lite CGN / PRR

IPv4 Internet

ISP

IPv61

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Encap

1IPv4 in IPv6@IPv6 src = @IPv6 in IPv6Pref@IPv6 dst = @IPv6 of DS-lite CGN / PRR

from cpe to cn14
From CPE to CN
  • IPv6 Conf:
  • IPv6Pref (e.g. /56)
  • @IPv6 of DS-lite CGN / PRR

IPv4 Internet

ISP

IPv6

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Encap

DS-lite CGN: NAT Translation(includes Decap)

PRR: Decap

from cpe to cn15
From CPE to CN
  • IPv6 Conf:
  • IPv6Pref (e.g. /56)
  • @IPv6 of DS-lite CGN / PRR
  • IPv6 IGP/i-BGP Advert:
  • WKIPv6+IPv4external

IPv4 Internet

ISP

IPv6

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Encap

DS-lite CGN: NAT Translation(includes Decap)

PRR: Decap

WKIPv6: IPv6 Prefix either IANA or ISP

from cpe to cn16
From CPE to CN
  • IPv6 Conf:
  • IPv6Pref (e.g. /56)
  • @IPv6 of DS-lite CGN / PRR
  • IPv6 IGP/i-BGP Advert:
  • WKIPv6+IPv4external

IPv4 Internet

ISP

IPv6

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Encap

Stateless Encap

DS-lite CGN: NAT Translation(includes Decap)

PRR: Decap

from cpe to cn17
From CPE to CN
  • IPv6 Conf:
  • IPv6Pref (e.g. /56)
  • @IPv6 of DS-lite CGN / PRR
  • IPv6 IGP/i-BGP Advert:
  • WKIPv6+IPv4external

IPv4 Internet

ISP

IPv6

IPv6

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Encap

Stateless Encap

DS-lite CGN: NAT Translation(includes Decap)

PRR: Decap

from cpe to cn18
From CPE to CN
  • IPv6 Conf:
  • IPv6Pref (e.g. /56)
  • @IPv6 of DS-lite CGN / PRR
  • IPv6 IGP/i-BGP Advert:
  • WKIPv6+IPv4external

IPv4 Internet

ISP

IPv6

IPv4

IPv6

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Encap

Stateless Encap

Decap

DS-lite CGN: NAT Translation(includes Decap)

PRR: Decap

from cn to cpe
From CN to CPE

IPv4 Internet

ISP

IPv6

IPv4

IPv6

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

from cn to cpe20
From CN to CPE
  • IPv4 BGP Advert:
  • IPv4internal

IPv4 Internet

ISP

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

from cn to cpe21
From CN to CPE
  • IPv4 BGP Advert:
  • IPv4internal

IPv4 Internet

ISP

IPv4

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

from cn to cpe22
From CN to CPE
  • IPv6 IGP Advert:
  • WKIPv6+IPv4(DS-lite/PRR pool)
  • IPv4 BGP Advert:
  • IPv4internal

IPv4 Internet

ISP

IPv4

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

from cn to cpe23
From CN to CPE
  • IPv6 IGP Advert:
  • WKIPv6+IPv4(DS-lite/PRR pool)
  • IPv4 BGP Advert:
  • IPv4internal

IPv4 Internet

ISP

IPv4

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Stateless Encap

from cn to cpe24
From CN to CPE
  • IPv6 IGP Advert:
  • WKIPv6+IPv4(DS-lite/PRR pool)
  • IPv4 BGP Advert:
  • IPv4internal

IPv4 Internet

ISP

IPv6

IPv4

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Stateless Encap

from cn to cpe25
From CN to CPE
  • IPv6 IGP Advert:
  • WKIPv6+IPv4(DS-lite/PRR pool)
  • IPv4 BGP Advert:
  • IPv4internal

IPv4 Internet

ISP

IPv6

IPv4

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Decap

Stateless Encap

from cn to cpe26
From CN to CPE
  • IPv6 IGP Advert:
  • WKIPv6+IPv4(DS-lite/PRR pool)
  • IPv4 BGP Advert:
  • IPv4internal

IPv4 Internet

ISP

IPv6

IPv4

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Decap

Stateless Encap

DS-lite CGN: Reverse NAT Translation (includes @IPv6 of CPE)

PRR: Binding Table PR  @IPv6 of CPE and Encap

from cn to cpe27
From CN to CPE
  • IPv6 IGP Advert:
  • WKIPv6+IPv4(DS-lite/PRR pool)
  • IPv4 BGP Advert:
  • IPv4internal

IPv4 Internet

ISP

IPv6

IPv4

IPv6

IPv6-IPv4ICXF

DS-lite CGNPRR

CN

CPE

Decap

Stateless Encap

DS-lite CGN: Reverse NAT Translation (includes @IPv6 of CPE)

PRR: Binding Table PR  @IPv6 of CPE and Encap

two cpes same isp
Two CPEs same ISP

ISP

IPv6

IPv6

DS-lite CGN1PRR1

CPE1

IPv6

IPv6

DS-lite CGN2PRR2

CPE2

conclusion
Conclusion
  • Stateless encap/decap functions at interconnection nodes
  • IPv6 Routing does not take into account Port Range (can be dynamic)
  • Provide flexibility for DS-lite vs. Port Range selection:
    • Vendors can implement both DS-lite CGN and a-PRR functions in the same device
    • Same IPv6 requirements on the customer devices for both DS-lite and IPv6 Port Range
      • IPv6 prefix
      • IPv6 address to reach PRR/DS-lite CGN
    • Allow flow-based differentiated treatments in a combined DS-lite/PRR box
  • IPv6-only ISP network
questions to the wg
Questions to the WG
  • I-D.boucadair-dslite-interco-v4v6 "Stateless IPv4-IPv6 Interconnection in the Context of DS-lite Deployment" as a Softwire WG document?
  • Softwire charter revisited to host A+P work?