© 2000, Cisco Systems, Inc. Cisco Video Conferencing Gatekeeper Design Scott Kirby Distinguished...

© 2000, Cisco Systems, Inc. www.cisco.com

Cisco Video ConferencingGatekeeper Design

Cisco Video ConferencingGatekeeper Design

Scott KirbyDistinguished Systems Engineer

© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family

AgendaAgenda

• Deployment Models

• Network Design

• Dial Plans

• Call Routing

• Cisco Video Infrastructure


Deployment ModelsDeployment Models

• Single Zone Campus

• Single Zone WAN

• Multi Zone Campus

• Multi Zone WAN


Single Zone Campus ModelSingle Zone Campus Model

H.323 Terminals

Gatekeeper

GatewayISDN

QoS Enabled

IP LAN

GK

GW

MCU

MCU

H.323 Zone

H.320Video Unit


MCU

Single Zone WAN ModelSingle Zone WAN Model

MCU

GK

QoS Enabled IP WAN

GW

ISDNH.320Video Unit

MCU

Gatekeeper

Gateway

H.323 TerminalsH.323 Terminal

H.323 Terminal


Multi Zone Campus ModelMulti Zone Campus Model

MCU

GK

QoS Enabled IP Core

GW

ISDN

H.320Video Unit

MCU

Zone 1

Gatekeeper

GatewayMCU’s

H.323 Terminals

MCU

GK

Zone 2

MCU

Gatekeeper

H.323 Terminals

H.323 Terminal


Multi Zone WAN ModelMulti Zone WAN Model

MCU

GK

QoS Enabled IP WAN

GW

ISDNH.320Video Unit

MCU

Gatekeeper

Gateway

H.323 TerminalsH.323 Terminals

H.323 Terminals

GK

GK

MCU

MCU

Zone 1 Zone 2

Zone 3


AgendaAgenda


• Network Design & QoS

• Dial Plans

• Call Routing



Endpoint:

Polycom & VCON

IP Precedence 4

Endpoint:

Polycom & VCON

IP Precedence 4

Proxy:

Set IP Precedence 4 or use RSVP

Proxy:

Set IP Precedence 4 or use RSVP

Switch:

Classify and Mark Packets if necessary

IP Precedence 4

DSCP AF41

Switch:

Classify and Mark Packets if necessary

IP Precedence 4

DSCP AF41

Traffic ClassificationTraffic Classification

Central Campus

Proxy ClassificationProxy Classification Endpoint ClassificationEndpoint Classification

Router:

ACL entry

IP Precedence 4

DSCP AF41

Router:

ACL entry

IP Precedence 4

DSCP AF41

L3 ClassificationL3 Classification L3 ClassificationL3 Classification

SiSi

SiSi

G

WAN


Classify and Mark Packets from Endpoint

IP Precedence 4/

DSCP AF41

Classify and Mark Packets from Endpoint

IP Precedence 4/

DSCP AF41

VCON & Polycom

IP Precedence 4

VCON & Polycom

IP Precedence 4

Multiple queues on all ports; Priority Queuing for Video

WRED within Data queue for Congestion Avoidance

Multiple queues on all ports; Priority Queuing for Video

WRED within Data queue for Congestion Avoidance

Campus QoSCampus QoS

Campus

EndpointsEndpoints Access LayerAccess Layer Core Core

SiSi

SiSi

GCall Admission

Control

GatekeeperGatekeeper


Low-Latency Queuing

Bandwidth Provisioning

Low-Latency Queuing


Single Zone WANSingle Zone WAN

Central Campus

WAN

Remote site

Classification and Trust Boundaries on Video Terminals (VCON, Polycom) , or Access Layer switch and router

IP Prec. 4/DSCP AF41

Classification and Trust Boundaries on Video Terminals (VCON, Polycom) , or Access Layer switch and router

IP Prec. 4/DSCP AF41

SiSi

SiSi

G

QoS - WANQoS - WAN QoS - BranchQoS - Branch WAN CACWAN CAC

WAN sites should notcontain more than 2Video units.

No CAC across WAN

Campus CACCampus CAC

CAC on Campus iscontrolled by GK

GK will also provide CAC from Campusto the WAN


Low-Latency Queuing IP Prec.


Low-Latency Queuing IP Prec.


Multi Zone WAN Multi Zone WAN

Central Campus

WAN

Remote Site

Traffic Classification

Done using the Proxy

in the Campus and

Remote site

IP Precedence or RSVP

Traffic Classification

Done using the Proxy

in the Campus and

Remote site

IP Precedence or RSVP

SiSi

SiSi

G

QoS - WANQoS - WAN WAN CACWAN CAC

CAC at Remote Siteand across WAN controlled by BranchGK.

Campus CACCampus CAC

CAC on Campus and across WANcontrolled by Campus GK

G

Campus & Branch QoSCampus & Branch QoS


ProvisioningProvisioning

Data Rate x 20% = Provisioned BW

128k = 153k

384k = 460k

512k = 614k

768k = 921k

1.5M = 1.8M

Video Voice

0.33 x Link Capacity0.33 x Link Capacity

Data

0.75 x Link Capacity0.75 x Link Capacity

Routingetc.

Link CapacityLink Capacity


AgendaAgenda


• Network Design

• Dial Plans

• Call Routing



Zone PrefixZone Prefix

QoS Enabled IP WAN

San Jose CampusZone Prefix 408

New York OfficeZone Prefix 212

Denver OfficeZone Prefix 720

•Use Local Area Code•Already Unique and Defined•Users associate the area code with the location


Service PrefixService Prefix

San Jose CampusZone Prefix 408

• Defines an available service on an MCU or Gateway.• Referred to as Technology Prefix in the MCM• Reserve Blocks of numbers for SP 8* for MCUs and 9* for gateways• MCU SP will include ZP for zone association and dial string consistency• Gateways SPs will not include the ZP• “As a Rule” local gateway will be used for PSTN access when available• If a zone doesn’t contain a gateway PSTN calls will be routed to a designated zone for PSTN access

MCU

40880 = 384k 5 Users40881 = 128k 7 Users

GW

90 = 384k91 = 128k


E.164 AddressingE.164 Addressing

San Jose CampusZone Prefix 408GW SP= 90 & 91

MCU SP = 40880 & 40881

DID:•Have carrier pass all 10 digits• Don’t overlap GW Service Prefixes with E.164 addresses

IVR:•Use 10 digit E.164 addresses• Don’t overlap GW Service Prefixes with E.164 addresses

E.164 Address Range4085221000 - 4085222000


H323-IDsH323-IDs

San Jose CampusZone Prefix 408GW SP= 90 & 91

MCU SP = 40880 & 40881

• Alphanumeric ID assigned to each H.323 video terminal• Use email addresses and conference room names

E.164 Address Range4085221000 - 4085222000

[email protected]

[email protected]


AgendaAgenda


• Network Design

• Dial Plans

• Call Routing



Call Routing ScenariosCall Routing Scenarios

MCU

E.164 = 4085551000H323-ID = [email protected]


Service Prefix40883 = 384k


Dial String 4085552000


384k conference initiatedConference ID 408831212

Call can also be placed usingH323-ID

GW


Service Prefix90 =384k


90 is matched as 384k call, 90 is stripped, and 15104241000 is dialed on PSTN.


Call Routing Using HopoffsCall Routing Using Hopoffs

QoS Enabled IP WAN

90 =384k

H.323 TerminalsH.323 Terminal

GK

Gatekeeperzone local sf_gk cisco.com10.1.2.1zone remote sj_gk cisco.com 10.1.1.1zone prefix sf_gk 415*zone prefix sj_gk 408*gw-type-prefix 90 hopoff sj_gk

Gatekeeperzone local sj_gk cisco.com10.1.1.1zone remote sf_gk cisco.com 10.1.2.1zone prefix sj_gk 408*zone prefix sf_gk 415*

H.323 TerminalDials 902125671212

H.320 Terminal2125671212

ISDN

GK

GW


AgendaAgenda


• Network Design

• Dial Plans

• Call Routing



Multimedia Conference ManagerMultimedia Conference Manager

Gatekeeper:

• H.323 component registration and call routing

• Bandwidth Management (CAC)

• AAA (Authentication, Authorization and Accounting) support (RADIUS & TACACS)

• Redundancy (HSRP)

Proxy:

• Classification of Video/Audio streams with IP Precedence or RSVP for QoS.

• Application Specific Routing (ASR).

• Access to Firewalls and NAT environments.


Multimedia Conference ManagerMultimedia Conference Manager

Chassis IP Routing H.323 EndpointRegistration

SimultaneousVideo Calls

Video ProxySessions

72XX 50-100K pps 3000 50050 @ 768kbps75 @ 384kbps100 @ 128kbps

3660 25-100K pps 1800 25025 @ 768kbps35 @ 384kbps50 @ 128kbps



262X 5-10K pps 900 602 @ 768kbps4 @ 384kbps8 @ 128kbps

261X 2-5K pps 900 602 @ 768kbps4 @ 384kbps6 @ 128kbps


25XX N/A 600 302 @768kbps4 @ 384kbps10 @ 128kbps


Gatekeeper CACGatekeeper CAC

Gatekeeper Bandwidth controls 12.1(5)TInterzone: Total bandwidth from all other zones

Remote: Total bandwidth to all other zones

Session: Bandwidth per session in a zone

Total: Total bandwidth in a zone


Proxy QoSProxy QoS

GatekeeperProxy

GatekeeperProxy

Leg 2 : QoS Enabled Call from Proxy to Proxy with IP Precedence or RSVP

Leg 1: Terminated from

Video Terminal 1 to ProxyLeg 3:Terminated call from

Video Proxy to Terminal 2

QoS Enabled IP WAN

H.323Video Terminal 2 H.323

Video Terminal 1


Application Specific RoutingApplication Specific Routing

QoS EnabledIP WAN

IP WAN

Gatekeeper/ProxyGatekeeper/Proxy

H.323 Terminals

H.323 Terminals

IP Desktops

IP Desktops

= Video Traffic

= Data Traffic

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