www.internetsociety.org

york@isoc.org +1-802-735-1624

Dan York Senior Content Strategist, DO Hub

How IPv6 Impacts SIP and Telecom

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Dan York

www.danyork.com

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My Recent Change

DO Hub Project york@isoc.org +1-802-735-1624

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www.internetsociety.org

Why IPv6?

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In The Beginning...

192.168.20.12

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Mobility

www.flickr.com/photos/kapungo/3396823518/

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A Plethora of Portable Platforms

www.flickr.com/photos/clonedmilkmen/5111779335/

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Internet of Things

www.flickr.com/photos/dmje/5159177886/

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Internet of Things

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Internet of Things

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EVERYTHING over

IP

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How IP Address Allocation Works

Regional Internet Registries (RIRs)

Internet Service Providers (ISPs)

You

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Global IPv4 Disparity !

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Oops... as of Feb 1, 2011...

Regional Internet Registries (RIRs)

Internet Service Providers (ISPs)

You

All Gone!

www.internetsociety.org

Solutions?

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IPv4 Marketplace

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Prolonging IPv4 - NAT Today

Firewall

ISP  

Internet Firewall

IP Phone

PC

Home Firewall

Home  

Public  IP  NAT  

Private  IP  Addresses  

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Carrier Grade NAT (a.k.a. LSN)

ISP  

Internet Firewall

IP Phone

PC

Home Firewall

Home  

Public  IP  NAT  

Private  IP  Addresses  

Firewall

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Old NATs Never Die...

ISP  

Internet Firewall

IP Phone

PC

Home Firewall

Home  

Public  IP  NAT  

Private  IP  Addresses  

Firewall

NAT  Private  IP  Addresses  

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The Problem?

SIP NAT

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Oh, and by the way...

(sorry... we still have NAT-like networks with IPv6...)

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And then there is...

www.internetsociety.org

IPv6 Challenges: User Interfaces

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See the problem?

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See the problem?

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IPv4

192.168.20.12

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IPv6

2001:db8:34a5:23:aa1f:12f4:9009:1234

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IPv6 Address Compression

2001:db8:34a5:0:0:0:0:1

2001:db8:34a5::1 (oh, and they aren’t case-sensitive)

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IPv6 Addresses

127.0.0.1 ::1

0.0.0.0 ::

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DNS is your friend!

www.internetsociety.org

IPv6 Challenges: Port Numbers

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IPv4 Port Numbers

192.168.20.12:5060

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IPv4 Port Numbers in IPv6?

192.168.20.12:5060

2001:db8:34a5::1234:5060

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IPv6 Port Numbers

[2001:db8:34a5::1234]:5060

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IPv6 addressing

http://[2001:db8:34a5::1234]/index.html

http://[2001:db8:34a5::1234]:8080

sip:dan@[2001:db8:34a5::1234]

sip:dan@[2001:db8:34a5::1234]:5060

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DNS is your friend!

www.internetsociety.org

IPv6 Challenge: Multiple Addresses

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IPv4 – Single Address / Interface

192.168.20.12

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IPv6 – Multiple Addresses / Interface

192.168.20.12

2001:db8:34a5:92:21c:a5ff:fe12:3a80 (global)

fe80::21c:a5ff:fe12:3a80 (link-local)

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IPv6 – Neighbor Discovery

No More DHCP For Address Assignment

(well, unless you want it)

Router Advertisements vs ARP

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IPv6 – Address Creation

2001:db8:34a5:92:21c:a5ff:fe12:3a80

Router Advertisement

Autoconfiguration from Ethernet Address

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DNS is your friend!

www.internetsociety.org

IPv6 Challenges: DNS

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IPv4 and DNS

example.com 3600 IN A 192.168.20.12

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IPv6 and DNS

example.com 3600 IN A 192.168.20.12

example.com 3600 IN AAAA 2001:db8:34a5::1234

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IPv6 DNS Fun

What if DNS gives a AAAA....

but your system doesn’t have “real” IPv6 connectivity?

(You can retrieve AAAA records over IPv4)

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UNhappy Eyeballs

You

DNS Svr

example.com A 192.168.20.12 example.com AAAA 2001:db8:34a5::1234

AAAA

(a long time later...)

A

?

?

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Happy Eyeballs

You

DNS Svr

example.com A 192.168.20.12 example.com AAAA 2001:db8:34a5::1234

AAAA

A ?

?

(sent at same time; whichever replies first wins)

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Happy Eyeballs

draft-ietf-v6ops-happy-eyeballs

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IPv6 Challenges: Storing IP Addresses

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How Do You Store IP Addresses?

Memory? Databases?

Config Files?

Room for two? (or more?)

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Config Files

<category name="SIP">

<item name="Server1">127.0.0.1:5060 </item>

</category>

www.internetsociety.org

IPv6 and SIP

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IPv6 Works Fine!

Linphone – http://www.linphone.org Open source, free and available for Linux, Windows and MacOS X

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Linphone and IPv6

Linphone – http://www.linphone.org Open source, free and available for Linux, Windows and MacOS X

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RFC 6157

RFC 6157 “IPv6 Transition in the Session

Initiation Protocol (SIP)” tools.ietf.org/html/rfc6157

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SIP Architecture

SIP Proxy

A

Alice Bob Media (RTP, MSRP, etc.)

SIP SIP

SIP Proxy

B SIP

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SIP Reality

Internet (or WAN)

Alice Bob Media

SIP SIP

SIP Proxy

A SIP

SIP Proxy

B

SIP Proxy

N

SIP Proxy

D SIP

SIP Proxy

C SIP SIP

Media Proxy

A

Media Proxy

B Media Media

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“SIP” = Multiple Protocols

SIP SDP

RTP

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IPv4/IPv6 Fun

Communicating between IPv4 client and IPv6 client through a proxy

§  Record-Route: <sip:2001:db8::1;lr>

§  Record-Route: <sip:192.0.2.1;lr>

Mixed communication across a path of proxies

Mixed communication: IPv6 for SIP, IPv4 for media

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IPv6 and SDP

Only allows a single IP address per media stream (“c=“ parameter)

§  c=IN IP4 192.168.20.12

§  c=IN IP6 2001:db8:34a5::1234

Multiple proposals for additional SDP parameters

§  ex. ANAT - RFC 4091 & 4092 – now deprecated by ICE

The IETF way forward is ICE – RFC 5245

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NAT, NAT, NAT...

STUN, TURN, ICE

(RFC 5245)

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Discovery of SIP Servers

User agents need to find SIP servers/proxies

DHCPv6

§  SIP Options in RFC 3319

DNS SRV, NAPTR and AAAA Records (RFC 3263)

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Other IPv6 Considerations

Other interfaces

§  Web and management systems

§  Logging

§  APIs

Custom SIP headers

Multi-vendor interoperability

SBC and firewall support for SIP over IPv6

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SIPNOC 2011 IPv6 BOF

April 2011 BOF at SIPNOC 2011 in Herndon, VA

Identified potential actions:

§  Migration plans: collecting and publicizing plans that are available, helping find others

§  Identification of interoperability tests or test plans that include IPv6 and SIP

§  Providing case studies of successful migrations

§  Listing SIP-related tools/services/products that support IPv6

§  General education around IPv6 and SIP / real-time communication

Created new mailing list:

§  sipforum.org/mailman/listinfo/ipv6

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SIP Forum “IPv6” Mailing List

sipforum.org/mailman/listinfo/ipv6

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SIPit Test Events

sipit.net

SIPit 28: “68% of the implementations present supported IPv6.”

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Get Started With SIP and IPv6...

http://bit.ly/voxeoipv6

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Set up Test Lab or your Home Office

http://tunnelbroker.net

www.test-ipv6.com www.ipv6-test.com

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SIP Softphones Supporting IPv6

Linphone

§  www.linphone.org

Jitsi (formerly SIP Communicator)

§  www.jitsi.org

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Olle Would Want Me To Mention...

Asterisk 1.8

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Voxeo Application Platforms

Voxeo Prophecy 10.1 §  Standards-based platform for speech, IVR and SIP applications

§  Downloads and installs in minutes; Scales from 2 ports to 10’s of thousands of ports

§  World’s most compatible and compliant VoiceXML and CCXML

Voxeo PRISM 10.1 §  Real-time Communications Application Server §  Supports Converged SIP, Web and XMPP applications. §  Carrier grade high performance platform with full support of high

availability and session replication

Free developer versions for Windows, Linux, Mac OS X

www.voxeo.com/prophecy www.voxeo.com/prism

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SIP Forum “IPv6” Mailing List

sipforum.org/mailman/listinfo/ipv6

www.internetsociety.org

A New Internet Society Initiative Bridging the Divide Between IETF Standards and Industry-wide Deployment

www.internetsociety.org

Deployment & Operationalization (DO) Hub Helps you

•  DO IPv6 •  DO DNSSEC •  DO other future standards

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What DO Hub Will Look Like

•  Online portals for new standards adoption •  IPv6, DNSSEC, future standards topics •  Knowledge base with deployment articles •  Case studies •  Blogs (deployment commentary) •  Social media •  Multiple languages

•  ION meeting series •  Co-located with diverse set of events •  Events being planned to reach each continent

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When DO Hub Will Be Available

•  October 2011 •  Preview web presence release •  Engagement with first adopters begins to create initial

knowledge base articles •  First co-located ION event in Buenos Aires

•  December 2011 •  Official launch of DO Hub resource •  First knowledge base articles published •  Social media and blogging

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How DO Hub Will Grow

•  New deployment articles will be added to the knowledge base on a regular basis

•  Our blogs and social media efforts will provide an ongoing conversation about deployment

•  We will feature the work of other groups

•  We will add features to this deployment resource in response to feedback received from audiences

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How to Participate

•  Help Create Content •  We are working with first adopters and experts to

develop our materials •  We will credit your work

•  Help Define New Features •  We seek your valuable feedback on this deployment

resource •  We have the flexibility to make changes/additions

•  Contact us: dohub@isoc.org

www.internetsociety.org

york@isoc.org +1-802-735-1624

Dan York Senior Content Strategist, DO Hub, Internet Society

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