IPv6 and How It Impacts Communication Applications

IPv6 And How It Impacts  
Communications Applications"

May 5, 2011! Dan York!
Dir. of Conversations!
twitter.com/danyork!
twitter.com/voxeo!
dyork@voxeo.com!

Logistics!

  Please ask questions through the GoToWebinar
interface.

  Twitter hashtag(s): #ipv6 and/or #voxeo

  Archive will be available at:
•  http://blogs.voxeo.com/jamsessions/

© Voxeo Corporation

In The Beginning...!

192.168.20.12


Mobility!

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

Global IPv4 Disparity !


A Plethora of Portable Platforms!

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

Internet of Things!

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

EVERYTHING
over
IP


Prolonging IPv4 - NAT Today!

NAT

Public
IP
Private
IP

Addresses

PC

Home
Internet Firewall Firewall
Firewall

IP
ISP
Phone
Home


Carrier Grade NAT!

NAT

Public
IP
Private
IP

Addresses

PC

Home
Internet Firewall Firewall
Firewall

IP
ISP
Phone
Home


The Problem?!

SIP NAT


Oh, and by the way... !

(sorry... we still have NAT with IPv6...)


IPv4!

192.168.20.12


IPv6!

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


IPv6 Address Compression!

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


IPv6 Address Compression!

127.0.0.1 -> ::1

0.0.0.0 -> ::


IPv4 Port Numbers in IPv6?!

192.168.20.12:5060

2001:db8:34a5::1234:5060


IPv6 Port Numbers!

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


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


Subnet Masks!

192.168.20.0 w/subnet mask 255.255.255.0
192.168.20.0/24

2001:db8:34a5:92::/64
fe80::/10


IPv6 – Multiple Addresses / Interface!

192.168.20.12

2001:db8:34a5:92:21c:a5ff:fe12:3a80
(global)
fe80::21c:a5ff:fe12:3a80
(link-local)


IPv6 – Auto-conﬁguration!

2001:db8:34a5:92:21c:a5ff:fe12:3a80
fe80::21c:a5ff:fe12:3a80

Ethernet 00:1c:a5:12:3a:80

(Note: privacy extensions are available)


IPv6 – Neighbor Discovery!

No More DHCP For Address Assignment
(well, unless you really want it)

Router Advertisements

Also Replaces ARP


IPv6 – Address Creation!

Router Advertisement

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

Autoconfiguration from
Ethernet Address


IPv6 and DNS!

example.com 3600 IN A 192.168.20.12

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


IPv6 – Other Differences!

IMCPv6 Heavily Used
No More Packet Fragmentation
No More Broadcasts
Increased Use of Multicasts
NAT Traversal


Get Started With IPv6... !

http://bit.ly/voxeoipv6


IPv6 Works Fine!!

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

Linphone and IPv6!

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

DNS is your friend!


SIP Architecture!

IP-PBX

SIP SIP

Alice Bob
Media


Typical SIP Call Flow!

User Agent 1 SIP Server User Agent 2
INVITE
INVITE
100 Trying
180 Ringing
180 Ringing
200 OK
200 OK
ACK
ACK
Bi-directional Media between endpoints
BYE
BYE
200 OK
200 OK


SIP Architecture!

SIP SIP
Proxy Proxy
A SIP B

SIP SIP

Alice Bob
Media (RTP, MSRP, etc.)


SIP Reality!

SIP SIP SIP SIP SIP
Proxy Proxy Proxy Proxy Proxy
A SIP B SIP C SIP D SIP N

SIP Internet (or WAN) SIP

Media Media
Alice Proxy Proxy Bob
Media A Media B Media


“SIP” = Multiple Protocols!

  SIP
•  Control channel
•  Various headers for passing information
•  Offer/answer model for negotiating media (RFC3264)

  SDP (Session Description Protocol – RFC4566)
•  Defines media channel(s)
•  Passed inside SIP packets


SIP Clients and Servers!

  IPv4-only

  IPv6-only

  “Dual-stack” – IPv4/IPv6

  RFC 6157 (April 2011)
•  http://tools.ietf.org/html/rfc6157


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)


IPv4/IPv6 Fun!

  Choosing Which Address to Use
•  What if DNS gives a AAAA but your system doesn’t
have “real” IPv6 connectivity?
•  Note: You can retrieve AAAA records over IPv4
•  Which address do you try and for how long?
•  “happy eyeballs”

  Note: RFC 3484 defines selection process – and
operating system may make choice


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

IPv6 and SDP!

  SDP descripes the media capabilities

  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
•  ICE involves a negotation between endpoints to determine
the best address to use


NAT, NAT, NAT... !

STUN, TURN, ICE

(RFC 5245)


RFC 6157!

RFC 6157
“IPv6 Transition in the Session
Initiation Protocol (SIP)”
tools.ietf.org/html/rfc6157


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


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


IPv6 and Voxeo Prophecy and  
Voxeo PRISM!

The Prophecy Platform!

  Downloads and installs in minutes

  Scales from 2 ports to 10’s of thousands of ports

  World’s most compatible and compliant VoiceXML
implementation

  World’s most proven CCXML implementation

  CTI support (Cisco, Aspect, Genesys, Avaya,
others)

  Prophecy 10.1 adds support for IPv6, wideband
(HD) audio and fax


Prophecy Applications!

  Information retrieval   Open enrollment
  Telephone surveys   Traffic and weather
  Emergency notifications   Field technician enablement
  Bill reminders, collections   Voice Portals
  Account balance & transfer   Auto attendants
  Order status   Voicemail services
  Outbound notifications   Voice instant messaging
  Package tracking   Voice verification
  Conferencing solutions   Call recording solutions
  Telesales   Political campaigning
  Real estate information lines   …and many more


Uniﬁed Self-Service™!

  One application investment

  Multiple communication
channels

  One deployment platform –
or use your platform of choice

  Improved, accelerated ROI

  Any tool, programming
paradigm or language

  Voxeo compatibility modes for
porting existing applications

  Cloud, premise or hybrid


Prophecy and IPv6!

  IPv6 Support added in 10.1 in March 2011

  Download free 2-port version for Windows, Linux or
Mac OS X at:

•  www.voxeo.com/prophecy/

  Configuration process currently involves some
manual editing, but that will change:
•  docs.voxeo.com/prophecy/10.0/ipv6.htm

  Note: Voxeo Designer and Prophecy Log Search do
not currently work over IPv6.

Prophecy 10.1 – IPv6!


What is Voxeo Prism for?!

  High demand call control applications, such
as softswitch

  Complex call control and media control
applications, such as call center

  3GPP IMS services and applications platform

  Innovative multi-channel converged IP
communication applications


Real-time Communications App Server!

  Prism Supports Converged SIP, Web and
XMPP applications.

  Carrier grade high performance platform

  Scales to hundreds of call setups per
seconds and 10’s of thousands of active
sessions per server

  Rich SIP Registration and Presence
support.

  Full support for high availability and
session replication allowing deployment
of mission critical applications

59 © Voxeo Corporation

PRISM and IPv6!

  IPv6 Support added in 10.1 in May 2011

  Download free developer version for Windows,
Linux or Mac OS X at:

•  www.voxeo.com/prism/


SIP Forum “IPv6” Mailing List!

sipforum.org/mailman/listinfo/ipv6


World IPv6 Day!

June 8, 2011
isoc.org/wp/worldipv6day/


Next Jam Session!

“How Do You Hear Me Now? The
Power of Wideband (HD) Audio”

•  Thursday, June 9, 2011



Next Steps!

  Visit our IPv6 resource page and read our IPv6 blog posts:

•  http://bit.ly/voxeoipv6
•  blogs.voxeo.com/speakingofstandards/tag/ipv6/

  Sign up for Jam Sessions or view archives:



IPv6 and How It Impacts Communication Applications

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