Gatekeepers Gabe Moulton The Ohio State University [email protected] Seventh Annual Digital Video...
-
Upload
kathryn-spencer -
Category
Documents
-
view
217 -
download
0
Transcript of Gatekeepers Gabe Moulton The Ohio State University [email protected] Seventh Annual Digital Video...
![Page 1: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/1.jpg)
Gatekeepers
Gabe MoultonThe Ohio State [email protected]
Seventh Annual Digital Video Conference March 31, 2005Atlanta, Georgia
![Page 2: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/2.jpg)
Gatekeepers Provide:
Admission Control
Call Authorization
Address Translations
Bandwidth Management
Zone Management
Call Signal Routing
Management Functions
![Page 3: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/3.jpg)
H.323 Gatekeeper
Necessary for operations, but not mandatory in H.323
Required Functions• Address translation• Call admission/authorization
Some bandwidth management
![Page 4: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/4.jpg)
Typical Gatekeeper Components
Gatekeeper Core Functionality
Web Server Management
SNMP Services
![Page 5: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/5.jpg)
H.323 Zone
Definition• A single gatekeeper and all of the end points (clients, MCUs, and gateways) that register with the gatekeeper.
Typically is a community• E.g., University or organization
![Page 6: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/6.jpg)
Basic Operation
Endpoints register with gatekeeper
Endpoint asks gatekeeper for permission to place call to another endpoint
Endpoint signals call with other endpoint
Endpoints exchange media directly
Endpoints disconnect, notify gatekeeper
![Page 7: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/7.jpg)
Gatekeeper Functionality
Services: • Gives access to multipoint conferences and
gateways Neighbor Gatekeepers:
• Provides inter-zone communication Network Topology:
• Allow administrator to employ traffic shaping Endpoints:
• Live list of registered users Call Control:
• Live list of active calls
![Page 8: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/8.jpg)
Registrants
![Page 9: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/9.jpg)
Client Authorization
Open Gatekeepers• anyone can register
Predefined Endpoints
LDAP Authenticated Endpoints
![Page 10: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/10.jpg)
Services
Multipoint Conferences (most prominent use)
Gateways to other services
Defined by a dial string• Commons conferences use 3 digits
–EG 001189700 accesses a 384K conference
Conferences differentiate by pins• Commons uses 4 digits
–EG 0011897001234 access my 384K conference
![Page 11: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/11.jpg)
Defined Services
![Page 12: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/12.jpg)
Gatekeeper Alternatives
Standalone Gatekeeper• (e.g., Radvision ECS)
System Blade• (e.g., Radvision ECS on a blade of a ViaIP)
Embedded in an Endpoint• (e.g., A gatekeeper embedded in a Radvision OnLAN MCU or gateway)
Backup Gatekeeper• (e.g., Radvision Alternate Gatekeeper)
![Page 13: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/13.jpg)
Gatekeeper Alternatives
Other Gatekeepers:• Polycom PathNavigator• Cisco (Radvision code running on Cisco IOS)• VCON Media Exchange Manager, MXM• GNU Gatekeeper (Based on open H.323)
![Page 14: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/14.jpg)
Specific Example
Radvision embedded gatekeeper• Runs in a Radvision MCU or gateway.• PC configuration software. Provides parameter
setting, remote monitoring and user definition and control.
• Built-in telnet server. Provides optional monitoring and remote control.
• 100 simultaneous registrants and 30 simultaneous calls.
• Free !
![Page 15: Gatekeepers Gabe Moulton The Ohio State University Moulton.13@osu.edu Seventh Annual Digital Video Conference March 31, 2005 Atlanta, Georgia.](https://reader030.fdocuments.net/reader030/viewer/2022032723/56649f565503460f94c7a201/html5/thumbnails/15.jpg)
Questions?
Gabe Moulton
Technology Engineer
The Ohio State University
614 292 8443