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How to verify VB Multicast stream's actual bandwidth

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TitleHow to verify VB Multicast stream's actual bandwidth
ProblemWe've seen cases when the DME is assumed to be streaming VBM streams using more bandwidth than it is supposed to. This article provides an objective way to measure it.
Solution

Access your DME Diagnostics -> trace capture page, make sure to select the "interface to capture from" as the Bond0 interface, and delete any previous capture to prevent confusion. The default 50MB capture file size is usually enough:



Once you have the capture file, open with Wireshark Packet Analysis tool and the traffic will be mixed with all the unicast and all other unrelated traffic, so apply a filter for your Multicast address using the filter provided below:
ip.addr==<your.MC.Address.here>


Then select Statistics -> I/O graph, it will pop up a window, it may be necessary to scroll down, then check only for the filter you applied and click on the Y Axis unit and select Bits:



You can see the VB stream is pushing between 400 and 600 Kbits per sec, including video and audio.

You would then compare these values to the source in this example, 350Kbps for video and 72kbps for audio.

URL NameHow-to-verify-VB-Multicast-stream-real-bandwidth

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