I have a client complaying about the video quality of a C20 through an MPLS Link.
When i see the call statiscs i see packet loss and jitter.
These are the requirements for Video:
Interactive-Video traffic should be marked to DSCP AF41; excess videoconferencing traffic can be marked down by a policer to AF42 or AF43.
Loss should be no more than 1 percent.
One-way latency should be no more than 150 ms.
Jitter should be no more than 30 ms.
Assign Interactive-Video to either a preferential queue or a second priority queue (when supported); when using Cisco IOS LLQ, overprovision the minimum-priority bandwidth guarantee to the size of the videoconferencing session plus 20 percent. (For example, a 384-kbps videoconferencing session requires 460 kbps of guaranteed priority bandwidth.)
On the MPLS link they need to mark the traffic according to these requiremens correct?
Other whats is the resolution when i have a call with 384 kbps:
• 720p30 from 768 kbps • 720p60 from 1152 kbps • 1080p30 from 1472 kbps
Correct, you will have to priortize AF41 traffic. You will have to make sure that QoS is turned on in the LAN, WAN, MPLS. Also make sure that the AF41 marking is preserved end to end else it wont help you. This will also include trusting the uplink to the C20.
As far as resolution, if i were to venture a guess I would say 360p but it all depends on how dynamic the participants are in the call, lighting etc.
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