Transcript 16-dvts-over-ipv6

Firing Up DVTS over IPv6
Bill Cerveny
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What is DVTS?
• “Digital Video over IP”
• Videoconferencing over IPv6 or IPv4 with
preference for IPv6
• A product of the Wide Project
• http://www.sfc.wide.ad.jp/DVTS/
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Operating Systems Supported
•
•
•
•
FreeBSD
NetBSD
Linux
Windows 2000 and Windows XP (IPv4 only as
of Jan 10, 2002)
• MacOS X -- incomplete; IPv4 seems to work;
IPv6 stuff incomplete
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Tested Operating System
Environments
•Linux
–Must use specific Linux kernel and configuration
–Used Debian Linux, but any Linux variant
should be OK
–Firewire configuration on desktop easy, but
challenging on laptop PC
–Once working, everything looked obvious
–Gory details at end of presentation
•
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Tested Operating System
Environments
• MacOS X
– Wasn’t able to build without significant
modification; port incomplete
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Tested Configuration
This shows video/audio flow
Going one direction only. For
Both directions, duplicate this
Going in opposite direction.
Firewire Link
DV Camcorder
Desktop or
Laptop PC
15-30Mbps IPv6
Abilene
15-30Mbps IPv6
SVGA or
Composite Video
Video Content
Firewire Link
Desktop or
Laptop PC
DV Camcorder
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Network Traffic Generated
• By default, 32Mbps IPv6 or IPv4 traffic is
generated in each direction (30 frames per
second)
• Can reduce frame rate to 15 frames per second
to reduce bandwidth to about 16Mbps without
noticable degradation in video performance
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Bandwidth Stats from Test Between
Chicago and Armonk, NY
• Abilene (mix of IPv4 and IPv6 traffic)
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Bandwidth Stats from Test Between
Chicago and Armonk, NY
•Armonk IPv6 Router Stats - FastEthernet
Interface
Armonk, NY IPv6 Router Stats - Tunnel
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Cost of DVTS -- Wide Estimate
Item
Desktop or laptop
computer
Firewire cards for
PC or laptop
Camcorder
Quantity Per End
Cost Each
2
$2,000
2
$70
2
$1,500
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DVTS Cost - My Experience
Item
Quantity per endCost Each
Laptop or PC
2
Used existing
equipment
Camcorder
1
$1,000
A/D Converter
1
$300
Firewire
Cardbus or PCI
card
2
$50-100
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References
• DVTS Main Page http://www.sfc.wide.ad.jp/DVTS/
• DVTS Presentation to Internet2 IPv6
Workshop in Los Angeles http://www.toyabe.net/I2-presentation.ppt
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Linux Configuration Notes
•Configured on Debian Linux, 2.4.12 kernel.
•Turned on IEEE1394 (and IPv6) support in
Linux kernel
•DVTS source code looks for IEEE1394 kernel
source code at /usr/src/linux/drivers/ieee1394
•Must install libraw1394 libraries
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Kernel configuration - 1 of 3
Turning on “Experimental” Code
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Kernel configuration 2 of 3
Enabling IPv6
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Kernel configuration 3 of 3
IEEE1394 Options
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Personal Linux/Hardware
Compatibility Notes
•What works:
–IBM Thinkpad T21 and 600E
•Western Digital IEEE1394 Cardbus card (WDAD0003RNW)
•Sony DCR-PC9 Camcorder (also DCR-PC3 and DCR-PC7)
•Sony A/D Converter
–Dell 400Mhz GX1
•Pinnacle PCI IEEE1394 card
•Orange Micro IEEE1394/USB PCI card (USB not tested)
•Siig PCI card
•All Firewire devices listed above
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Personal Hardware Compatibility
Notes
• Doesn’t work:
– Siig 2-port Cardbus card (NN-PC2012)
– Dazzle Hollywood A/D Bridge
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Warnings
•Don’t try to use ohci1394 stuff in pcmcia-cs
source code -- it doesn’t work and developers
don’t intend to fix it (I wasted a lot of time
troubleshooting it, before I gave up)
•If you are using a Cardbus IEEE1394 card and
Linux freezes, you must remark some ohci1394
initialization code (this seems to be a laptop
memory problem)
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Final Note about DVTS (IMHO)
• You have to get past source code and hardware
configuration problems, but once you do this,
DVTS seems easy and straightforward.
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