© 2000, Cisco Systems, Inc. Cisco Video Conferencing Gatekeeper Design Scott Kirby Distinguished...
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Transcript of © 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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
Deployment ModelsDeployment Models
• Single Zone Campus
• Single Zone WAN
• Multi Zone Campus
• Multi Zone WAN
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
AgendaAgenda
• Deployment Models
• Network Design & QoS
• Dial Plans
• Call Routing
• Cisco Video Infrastructure
© 2000, Cisco Systems, Inc. www.cisco.comIP/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 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
© 2000, Cisco Systems, Inc. www.cisco.comIP/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 QoSCampus QoS
Campus
EndpointsEndpoints Access LayerAccess Layer Core Core
SiSi
SiSi
GCall Admission
Control
GatekeeperGatekeeper
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
Low-Latency Queuing
Bandwidth Provisioning
Low-Latency Queuing
Bandwidth Provisioning
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
Low-Latency Queuing IP Prec.
Bandwidth Provisioning
Low-Latency Queuing IP Prec.
Bandwidth Provisioning
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
AgendaAgenda
• Deployment Models
• Network Design
• Dial Plans
• Call Routing
• Cisco Video Infrastructure
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
AgendaAgenda
• Deployment Models
• Network Design
• Dial Plans
• Call Routing
• Cisco Video Infrastructure
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
Call Routing ScenariosCall Routing Scenarios
MCU
E.164 = 4085551000H323-ID = [email protected]
E.164 = 4085551000H323-ID = [email protected]
Service Prefix40883 = 384k
E.164 = 4085552000H323-ID = [email protected]
Dial String 4085552000
Dial String 408831212
384k conference initiatedConference ID 408831212
Call can also be placed usingH323-ID
GW
E.164 = 4085551000H323-ID = [email protected]
Service Prefix90 =384k
Dial String 9015104241000
90 is matched as 384k call, 90 is stripped, and 15104241000 is dialed on PSTN.
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
AgendaAgenda
• Deployment Models
• Network Design
• Dial Plans
• Call Routing
• Cisco Video Infrastructure
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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.
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
3640 10-40K pps 1800 15010 @ 768kbps15 @ 384kbps30 @ 128kbps
3620 10-15K pps 1800 7510 @ 768kbps15 @ 384kbps30 @ 128kbps
262X 5-10K pps 900 602 @ 768kbps4 @ 384kbps8 @ 128kbps
261X 2-5K pps 900 602 @ 768kbps4 @ 384kbps6 @ 128kbps
3810 2-5K pps 900 602 @ 768kbps4 @ 384kbps6 @ 128kbps
25XX N/A 600 302 @768kbps4 @ 384kbps10 @ 128kbps
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
© 2000, Cisco Systems, Inc. www.cisco.comIP/VC Product Family
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
28© 1999, Cisco Systems, Inc. F0_6844_c2