| VNS Video-Over-IP Guidelines |
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LAN Network Segmentation
ITS Video Network Services recommends that the local area network be segmented to separate video from data traffic. This segmented configuration below also allows for multiple video systems on the video segment. This configuration essentially provides a separate network for video. Segmentation can be accomplished either physically or virtually by creating a VLAN for video. The illustration below shows a Cisco 2851, which is one of the routers provided by ITS when you purchase your site's connectivity from the ITS Data Group. The ITS provided router will handle the QoS policies, and video side firewall. Specific QoS policies that match the number of video endpoints at your site will be programmed in the routers to assign the required bandwidth necessary to handle the number of endpoints at your site. Video packets will be given priority over data packets in all cases when purchasing specific QoS connectivity from ITS. QoS will be triggered on when the total throughput required approaches the maximum circuit bandwidth. Video packets will be given the bandwidth necessary to achieve a reliable connection. Since data packets are less susceptible to real time delays they will be handled as best effort. Video Network Services and ITS Data Services are responsible for configuration of the site routers to the Ethernet ports provided on the router. Quality of Service will be configured and verified to the video Ethernet port. For your site to receive the best possible quality your LAN design must be engineered to make effective use of the QoS services provided to your site. LAN design or redesign is the responsibility of the site.
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