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trouble with video over ethernet

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3 replies

by rusty

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We ahve recently put in several digital video surveillance systems. There is a remote client which is viewed at 2 other workstations. The video looks great, however it gets logged off frequently due to network traffic issues. I have already lowered the MTU of all machines to 1495. Can or should I go lower? I have tried to reduce network traffic by adding a new NIC and trying to seperate the camera traffic with it's own switch (linksys 5 port switch). Is there a way that I can give priority to my video traffic? this is driving us crazy. It logs off about every 25 minutes.

3 replies

by charlesharris

I am a bit curious as to what you mean by logs off. Do you mean that the cameras stop transmitting or broadcasting over the network? Also, what server/network are you running? Meaning are you running a Unix/Linux/Windows network? Which flavor as each of these deal with traffic differently?

by rusty

There is client software that logs off when there is a break in network traffic. It is a Windows 2000 environment.

by dplewis

I'm not sure why you lowered the maximum frame size on most clients - 1518 Bytes is the maximum anyway (excluding .1Q tags)
If the video runs badly on a dedicated network it's unlikely to be a QoS issue (there's no competition for the bandwidth.) Is there enough bandwidth - what speed are you running the LAN at, relative to the traffic generated by the video? Is it something as simple as a Duplex mismatch?

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