Number of multicast group supported on L2 switch
Created: Nov 4, 2021 09:30:14Latest reply: Nov 5, 2021 09:28:17
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ytlo
Created Nov 5, 2021 04:17:16
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Hi fuzi, Thanks for your reply. I am not that familiar with IP cameras. From what the CCTV provider said, there are 2 multicast groups on each camera, 1 for high resolution and 1 for low resolution. So the multicast communication between 24 cameras on a switch and the VMS server would need 48 multicast groups. And if 3 switches are on the same vlan, does the switch need to "see" the multicast group traffic on other switches ? So that each switch need to support 144 multicast group? 
fuzi_yao
Reply ytlo Created Nov 5, 2021 05:58:11
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I can answer your question in two ways. 1. If you have a switch connected between the camera and the server, and you want to see the camera on the server. Therefore, the switch supports transparent transmission of multicast data streams, regardless of whether it is high-resolution video or low-resolution video.
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ytlo
Created Nov 5, 2021 04:17:16
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Hi fuzi, Thanks for your reply. I am not that familiar with IP cameras. From what the CCTV provider said, there are 2 multicast groups on each camera, 1 for high resolution and 1 for low resolution. So the multicast communication between 24 cameras on a switch and the VMS server would need 48 multicast groups. And if 3 switches are on the same vlan, does the switch need to "see" the multicast group traffic on other switches ? So that each switch need to support 144 multicast group?
fuzi_yao
Reply ytlo Created Nov 5, 2021 05:58:11
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I can answer your question in two ways. 1. If you have a switch connected between the camera and the server, and you want to see the camera on the server. Therefore, the switch supports transparent transmission of multicast data streams, regardless of whether it is high-resolution video or low-resolution video.
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fuzi_yao
Created Nov 18, 2021 05:55:32
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This command is used to collect statistics on Layer 2 multicast forwarding. After configuring IGMP snooping, you can run this command to view information about Layer 2 multicast forwarding tables, including dynamically generated and static multicast entries. |
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