Medianet Reference Guide - Cisco

Enterprise Medianet Strategic QoS Recommendations
Chapter 4
Medianet QoS Design Considerations
Additionally, many media applications will require common sets of functions, such as transcoding,
recording, and content management. To avoid duplication of resources and higher implementation costs,
common media services need to be integrated into the IP network so they can be leveraged by multiple
media applications.
Furthermore, because of the effectiveness of multimedia communication and collaboration, the security
of media endpoints and communication streams becomes an important part of the media-ready strategy.
Access controls for endpoints and users, encryption of streams, and securing content files stored in the
data center are all part of a required comprehensive media application security strategy.
Finally, as the level of corporate intellectual property migrates into stored and interactive media, it is
critical to have a strategy to manage the media content, setting and enforcing clear policies, and having
the ability to protect intellectual property in secure and managed systems. Just as companies have
policies and processes for handling intellectual property in document form, they also must develop and
update these policies and procedures for intellectual property in media formats.
Therefore, to meet all these media application requirements, Cisco recommends—not to reengineer
networks to support each wave of applications—but rather to utilize an architectural approach, namely
a medianet architecture.
Enterprise Medianet Architecture
A medianet is built upon an architecture that supports the different models of media applications and
optimizes their delivery, such as those shown in the architectural framework in Figure 4-24.
Figure 4-24
Enterprise Medianet Architectural Framework
Clients
Medianet Services
Media Endpoint
Session Control Services
Media
Content
Call Agent(s)
Session/Border Controllers
Gateways
User
Interface
Codec
Media I/O
Access Services
Identity Services
Confidentiality
Mobility Services
Location/Context
Transport Services
Packet Delivery
Quality of Service
Session Admission
Optimization
Bridging Services
Conferencing
Transcoding
Recording
Storage Services
Capture/Storage
Content Mgmt
Distribution
IP
QoS-enabled, High Availability Network Design
MAN/WAN, Metro
Branch Ethernet, SONET, Campus Data Center
DWDM/CWDM
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Medianet Reference Guide
OL-22201-01