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

© 2000, Cisco Systems, Inc. IP/VC Product Family Agenda Deployment Models Network Design Dial Plans Call Routing Cisco Video Infrastructure

© 2000, Cisco Systems, Inc. IP/VC Product Family Deployment Models Single Zone Campus Single Zone WAN Multi Zone Campus Multi Zone WAN

© 2000, Cisco Systems, Inc. IP/VC Product Family Single Zone Campus Model H.323 Terminals Gatekeeper Gateway ISDN QoS Enabled IP LAN GK GW MCU H.323 Zone H.320 Video Unit

© 2000, Cisco Systems, Inc. IP/VC Product Family MCU Single Zone WAN Model MCU GK QoS Enabled IP WAN GW ISDN H.320 Video Unit MCU Gatekeeper Gateway H.323 Terminals H.323 Terminal

© 2000, Cisco Systems, Inc. IP/VC Product Family Multi Zone Campus Model MCU GK QoS Enabled IP Core GW ISDN H.320 Video Unit MCU Zone 1 Gatekeeper Gateway MCUs H.323 Terminals MCU GK Zone 2 MCU Gatekeeper H.323 Terminals H.323 Terminal

© 2000, Cisco Systems, Inc. IP/VC Product Family Multi Zone WAN Model MCU GK QoS Enabled IP WAN GW ISDN H.320 Video Unit MCU Gatekeeper Gateway H.323 Terminals GK MCU Zone 1 Zone 2 Zone 3

© 2000, Cisco Systems, Inc. IP/VC Product Family Agenda Deployment Models Network Design & QoS Dial Plans Call Routing Cisco Video Infrastructure

© 2000, Cisco Systems, Inc. IP/VC Product Family 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 Classification Central Campus Proxy Classification Endpoint Classification Router: ACL entry IP Precedence 4 DSCP AF41 Router: ACL entry IP Precedence 4 DSCP AF41 L3 Classification G WAN

© 2000, Cisco Systems, Inc. IP/VC Product Family 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 QoS Campus Endpoints Access Layer Core G Call Admission Control Gatekeeper

© 2000, Cisco Systems, Inc. IP/VC Product Family Low-Latency Queuing Bandwidth Provisioning Low-Latency Queuing Bandwidth Provisioning Single 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 G QoS - WAN QoS - Branch WAN CAC WAN sites should not contain more than 2 Video units. No CAC across WAN Campus CAC CAC on Campus is controlled by GK GK will also provide CAC from Campus to the WAN

© 2000, Cisco Systems, Inc. IP/VC Product Family Low-Latency Queuing IP Prec. Bandwidth Provisioning Low-Latency Queuing IP Prec. Bandwidth Provisioning 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 G QoS - WAN WAN CAC CAC at Remote Site and across WAN controlled by Branch GK. Campus CAC CAC on Campus and across WAN controlled by Campus GK G Campus & Branch QoS

© 2000, Cisco Systems, Inc. IP/VC Product Family Provisioning Data Rate x 20% = Provisioned BW 128k = 153k 384k = 460k 512k = 614k 768k = 921k 1.5M = 1.8M Video Voice 0.33 x Link Capacity Data 0.75 x Link Capacity Routing etc. Link Capacity

© 2000, Cisco Systems, Inc. IP/VC Product Family Agenda Deployment Models Network Design Dial Plans Call Routing Cisco Video Infrastructure

© 2000, Cisco Systems, Inc. IP/VC Product Family Zone Prefix QoS Enabled IP WAN San Jose Campus Zone Prefix 408 New York Office Zone Prefix 212 Denver Office Zone Prefix 720 Use Local Area Code Already Unique and Defined Users associate the area code with the location

© 2000, Cisco Systems, Inc. IP/VC Product Family Service Prefix San Jose Campus Zone 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 doesnt contain a gateway PSTN calls will be routed to a designated zone for PSTN access MCU = 384k 5 Users = 128k 7 Users GW 90 = 384k 91 = 128k

© 2000, Cisco Systems, Inc. IP/VC Product Family E.164 Addressing San Jose Campus Zone Prefix 408 GW SP= 90 & 91 MCU SP = & DID: Have carrier pass all 10 digits Dont overlap GW Service Prefixes with E.164 addresses IVR: Use 10 digit E.164 addresses Dont overlap GW Service Prefixes with E.164 addresses E.164 Address Range

© 2000, Cisco Systems, Inc. IP/VC Product Family H323-IDs San Jose Campus Zone Prefix 408 GW SP= 90 & 91 MCU SP = & Alphanumeric ID assigned to each H.323 video terminal Use addresses and conference room names E.164 Address Range

© 2000, Cisco Systems, Inc. IP/VC Product Family Agenda Deployment Models Network Design Dial Plans Call Routing Cisco Video Infrastructure

© 2000, Cisco Systems, Inc. IP/VC Product Family Call Routing Scenarios MCU E.164 = H323-ID = E.164 = H323-ID = Service Prefix = 384k E.164 = H323-ID = Dial String Dial String k conference initiated Conference ID Call can also be placed using H323-ID GW E.164 = H323-ID = Service Prefix 90 =384k Dial String is matched as 384k call, 90 is stripped, and is dialed on PSTN.

© 2000, Cisco Systems, Inc. IP/VC Product Family Call Routing Using Hopoffs QoS Enabled IP WAN 90 =384k H.323 Terminals H.323 Terminal GK Gatekeeper zone local sf_gk cisco.com zone remote sj_gk cisco.com zone prefix sf_gk 415* zone prefix sj_gk 408* gw-type-prefix 90 hopoff sj_gk Gatekeeper zone local sj_gk cisco.com zone remote sf_gk cisco.com zone prefix sj_gk 408* zone prefix sf_gk 415* H.323 Terminal Dials H.320 Terminal ISDN GK GW

© 2000, Cisco Systems, Inc. IP/VC Product Family Agenda Deployment Models Network Design Dial Plans Call Routing Cisco Video Infrastructure

© 2000, Cisco Systems, Inc. IP/VC Product Family Multimedia 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.

© 2000, Cisco Systems, Inc. IP/VC Product Family Multimedia Conference Manager

© 2000, Cisco Systems, Inc. IP/VC Product Family Gatekeeper CAC Gatekeeper Bandwidth controls 12.1(5)T Interzone: 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

© 2000, Cisco Systems, Inc. IP/VC Product Family Proxy QoS Gatekeeper Proxy Gatekeeper Proxy Leg 2 : QoS Enabled Call from Proxy to Proxy with IP Precedence or RSVP Leg 1: Terminated from Video Terminal 1 to Proxy Leg 3:Terminated call from Video Proxy to Terminal 2 QoS Enabled IP WAN H.323 Video Terminal 2 H.323 Video Terminal 1

© 2000, Cisco Systems, Inc. IP/VC Product Family Application Specific Routing QoS Enabled IP WAN Gatekeeper/Proxy H.323 Terminals IP Desktops = Video Traffic = Data Traffic

28 © 1999, Cisco Systems, Inc. F0_6844_c2