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Presents IMTC/Wainhouse Research European Forum 2003. Fundamentals of IP Conferencing. Presented by Dr. E. Brent Kelly Senior Analyst and Consultant Wainhouse Research [email protected] The Internet Has Been An Anonymous Real Time Communication Medium. everybody knows you’re.

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Presentation Transcript
slide1
Presents

IMTC/Wainhouse Research European Forum 2003

fundamentals of ip conferencing

Fundamentals of IP Conferencing

Presented by Dr. E. Brent Kelly

Senior Analyst and Consultant

Wainhouse Research

[email protected]

the internet has been an anonymous real time communication medium
The Internet Has Been An Anonymous Real Time Communication Medium

everybody knows you’re

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

top down bottom up deployment
Top Down - Bottom Up Deployment
  • The Bottom Up – Top Down Paradox
    • Most IP videoconferencing implementations begin with at the grass roots
    • Successful implementation often needs upper management participation
      • Buy in by the IT group
      • QoS
      • Capital
      • Rationalization of business processes
  • Managers will want well conceived business cases

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

elements of successful implementation planning
Elements of Successful Implementation Planning
  • Map Existing Network topology
  • Layers
  • Devices
  • Gateways
  • Firewalls
  • Servers

LAN

WAN

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

implementation planning
Implementation Planning
  • Superimpose videoconferencing devices on the topology map

LAN

Endpoint

Gatekeeper

MCU

WAN

MCU

Gatekeeper

Gateway

Endpoints

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

implementation planning1
Implementation Planning
  • Analyze each network segment to establish a baseline for
    • Average available bandwidth
    • Peak or burst bandwidth available
    • Switch/router issues that may affect performance
      • Buffers, memory, CPU, etc.
    • Existing QoS functionality
    • Backup power capability
    • Scalability for increased traffic

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

implementation planning2
Implementation Planning
  • Caution: SNMP bandwidth monitor peak bandwidth utilization is not accurate

SNMP Resource Utilization Graph

Threshold

Actual Burst Rate

SNMP Values

Returned

Time Collection Intervals

Protocol analyzers show peak values often exceed

threshold values by 40% during SNMP rate intervals!

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

implementation planning3
Implementation Planning
  • Analyze Routers and Switches
    • Should be done by a network expert
    • Collect CPU and memory utilization
    • Analyze back plane utilization, queue depth, buffer failure
  • These devices may need upgrading to provide adequate QoS!

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

implementation planning4
Implementation Planning

192.201.125.47

192.201.126.38

  • IP Address Plan
    • Each new IP videoconferencing device will require an IP address
    • Static or dynamic?
    • Internet routable or not?
    • Consider network routes to other videoconferencing users
    • Look at number of videoconferencing users on each subnet and avoid congestion
    • Are redundant paths required in the event of a segment failure?

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

implementation planning5
Implementation Planning
  • Existing videoconferencing equipment
    • If your company has ISDN videoconferencing systems, work them into the implementation plan
    • They can be used with IP – ISDN gateways
    • At least one company makes a small gateway designed for a single ISDN system

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

implementation planning6
Implementation Planning
  • Preparing the Dialing Plan
    • The dialing plan directly impacts gatekeeper, MCUs, and gateways
    • How many digits will be used for local dialing
    • What prefix will be used for each remote location
    • What will gatekeeper topology look like
    • What multipoint conferences will be established and what are their prefixes
    • What gateway services will be established for connecting to ISDN and PSTN networks and what service prefixes will they use

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

four phased implementation approach
Four-Phased Implementation Approach
  • Make the specification as quantitative as possible
  • Develop a test plan that will test every aspect of the phase specification plan
  • Obtain critical mass
    • Deploy enough systems to make them easily available
    • Consider making some “kiosk systems”
  • Establish clear criteria for success

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

phase 1 enterprise lan
Phase 1 - Enterprise LAN

Corp Headquarters

LAN

MCU

  • Components
    • Endpoints
    • Gatekeeper
    • MCU
    • Video network software
    • Scheduling software

H.323

Standalone

Endpoint

H.323 Desktop

Endpoint

H.323

Standalone

Endpoint

Gatekeeper

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

phase 1 enterprise lan1
Phase 1 – Enterprise LAN
  • Phase 1 Goal: To Understand
    • QoS over the LAN
    • Gatekeeper functionality and dialing
    • MCU functionality and services
    • Endpoint interaction with gatekeeper, MCU, and each other
    • How to make point-to-point calls and MCU calls
    • How the video network management system works
    • How the scheduling system works

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

phase 2 lan to lan over wan
Phase 2 – LAN to LAN over WAN

Corp Headquarters

LAN

MCU

MCU

Remote Site

H.323 Desktop

Endpoint

  • Add remote components
    • Endpoints
    • Gatekeeper
    • MCU

Wide Area Network

MCU

H.323

Standalone

Endpoint

H.323

Standalone

Endpoint

H.323

Standalone

Endpoint

H.323 Desktop

Endpoint

Gatekeeper

H.323

Standalone

Endpoint

Gatekeeper

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

phase 2 lan to lan over wan1
Phase 2 – LAN to LAN over WAN
  • Phase 2 Goal: To Understand
    • QoS over the wide area network or overlay network
    • Gatekeeper zones and how to dial between them
    • MCU – MCU call setup and how to minimize WAN bandwidth requirements

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

phase 3 gateway capability
Switched Circuit

Network

H.320 mode

Phase 3 – Gateway Capability

Corp Headquarters

LAN

MCU

MCU

Remote Site

H.323 Desktop

Endpoint

Wide Area Network

MCU

  • Add ISDN and PSTN calling capability

H.323

Standalone

Endpoint

H.323

Standalone

Endpoint

H.323

Standalone

Endpoint

Voice only

(analog)

H.323 Desktop

Endpoint

Gatekeeper

H.320 MCU

H.323

Standalone

Endpoint

External Customers, Vendors, Remote Offices

PSTN/H.320

Gateway

Gatekeeper

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

phase 3 gateway capability1
Phase 3 – Gateway Capability
  • Phase 3 Goal: To Understand
    • How to set up gateway services and register them with the gatekeeper
    • How to dial out to ISDN system and how they can dial in
    • How to include telephone-only participants in video meetings
    • How to utilize gatekeeper least-cost-routing and alternative routing capabilities

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

phase 4 internet conferencing
Internet

H.320 mode

Phase 4 – Internet Conferencing

Corp Headquarters

LAN

MCU

MCU

Remote Site

H.323 Desktop

Endpoint

Wide Area Network

MCU

H.323

Standalone

Endpoint

H.323

Standalone

Endpoint

H.323

Standalone

Endpoint

Voice only

(analog)

H.323 Desktop

Endpoint

Gatekeeper

Switched Circuit

Network

H.320 MCU

H.323

Standalone

Endpoint

External Customers, Vendors, Remote Offices

PSTN/H.320

Gateway

Gatekeeper

H.323

Standalone

Endpoint

Firewall

NAT

H.323 Desktop

Endpoint

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

phase 4 internet conferencing1
Phase 4 – Internet Conferencing
  • Phase 4 Goal: To Understand
    • How to securely traverse a firewall
    • How to call out through the NAT
    • How to receive incoming calls through the NAT
    • How to call parties located on different IP networks
    • How call quality varies when calls are placed over the public Internet

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

slide22
Implementation Guidelines and Putting It All TogetherQuestions/Comments?

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

slide23
The End

Thank You

Wainhouse Research, LLC

[email protected]

IMTC/Wainhouse Research European Forum – May 2003 – Geneva, Switzerland

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