Cisco Cisco Video Assurance Management Solution 2.0 Scheda Tecnica
Data Sheet
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Cisco Video Assurance Management Solution 3.0
Solution Overview
Cisco
®
Video Assurance Management Solution (VAMS) 3.0 delivers to service providers real-time, centralized
monitoring of their headend/hubs and their core, distribution, and aggregation networks for broadcast video
transport. Cisco VAMS provides the framework for a modular, end-to-end assurance management architecture for
video services, such as linear broadcast and video on demand (VoD) based on MPEG-2 transport streams and
uncompressed flows.
Today most service providers use IP as the backbone to transport video. TV-class video being very sensitive to loss
and delay, any network-based impairments can adversely affect the end users’ quality of experience, which can lead
to customers abandoning the service provider. The challenge for service providers is to detect and resolve these
issues before customers start calling the customer service reps. Service providers require ways to monitor media
delivery performance and track causes for any degradation.
Cisco VAMS 3.0 allows service providers to monitor all their video flows directly from the data plane of the router
without having to pull the video flows to a dedicated card or appliance. With the Cisco 7600 and Cisco ASR 9000
Series Routers supporting inline video monitoring, or VidMon, VAMS gives service providers the ability to gather and
display per flow metrics by directly polling these routers. This is a tremondous benefit for operators, who can now
detect, diagnose, and pinpoint where in the IP transport network video impairment occurs due to loss and delay. See
Table 1.
Table 1.
Video Monitoring Metrics Supported by VAMS
Metric
Description
Support
MRV
Media Rate Variation: This metric allows the measurement of
packets per second of an IP constant bit rate (CBR) flow against
a user-configured nominal setting for that flow. MRV is most
applicable for uncompressed flows such as serial digital interface
(SDI) and high definition SDI (HD-SDI) where it is not possible to
inspect the payload.
packets per second of an IP constant bit rate (CBR) flow against
a user-configured nominal setting for that flow. MRV is most
applicable for uncompressed flows such as serial digital interface
(SDI) and high definition SDI (HD-SDI) where it is not possible to
inspect the payload.
Cisco 7600 Series Ethernet Services Plus (ES+) line card and
Cisco ASR 9000 Series
Cisco ASR 9000 Series
MDI_MLR
Media Delivery Index – Media Loss Rate: This metric is derived
by summarizing the total missing MPEG frames for a given
reporting period for a given PID (program).
by summarizing the total missing MPEG frames for a given
reporting period for a given PID (program).
Cisco 7600 ES+ line card
DF
Delay Factor: This metric is applicable to both MDI and MRV and
measures the difference between the arrival and drain rates of a
media stream.
measures the difference between the arrival and drain rates of a
media stream.
The DF over an interval period represents the buffering required
to handle variations in transmission at a point in the transmission
path.
to handle variations in transmission at a point in the transmission
path.
Cisco 7600 ES+ line card as MDI:DF and Cisco ASR 9000 Series
as MRV:DF
as MRV:DF
MDC
Media Discontinuity Counter: This measures the number of
MPEG discontinuities and provides the per MPEG program
identifier (PID) MDC, which gives the frequency of the
discontinuities for that program.
MPEG discontinuities and provides the per MPEG program
identifier (PID) MDC, which gives the frequency of the
discontinuities for that program.
Cisco 7600 ES+ line card
MSE
Media Stop Event: As Cisco devices are control-plane aware, it is
possible to isolate unexpected media loss at a point in the
network from loss that occurs as a result of normal control-plane
changes. This is reported as a Media Stop Event.
possible to isolate unexpected media loss at a point in the
network from loss that occurs as a result of normal control-plane
changes. This is reported as a Media Stop Event.
Cisco 7600 ES+ line card and Cisco ASR 9000 Series