[Support Package] March. 21, 2006 TS Updated Category System Integration Sub Category Network Product. Created

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1 Created March. 21, 2006 ID TS Updated Category System Integration Sub Category Network Product All video servers and IP cameras Purpose What s multicast? How to make it work? Support URL Tech Support MSN Messenger ID Customer.service@acti.com Customer.service@acti.com

2 What s multicast? How to make it work? This support package tells you A. What is multicast / Unicast? B. How to make multicast work? Table of contents: Chapter1: What is multicast? Uni-cast: Multicast: Multicast with IGMP Multicast without IGMP...5 Chapter2: How to make multicast work? Select the network switch/router If the switch doesn t support IGMP If the router doesn t support IGMP (Multicast Routing) Configure each network switch/router For Switch For Router Connect and Setup the IP camera/video server Connect the IP camera/video server via WAN port Set the WAN port streaming type to Multicast Set the IGMP to Enabled Set the Multicast IP Setup the software Chapter3: Glossary IGMP:...11

3 Chapter1: What is multicast? Multicast is a kind of network communication type. There are two kinds of communication type including Unicast and Multicast. Each of them works differently and is used in different applications. We will use an IP camera streaming to multiple PC as an example to explain Unicast and Multicast Uni-cast: Unicast is a network communication between a single sender (IP camera, video server) and a single receiver (Client PC or NVR) over a network. With unicast, the IP camera has to send an individual streaming for each client wish to see the images. With unicast, the more the client number is, the greater the network bandwidth required and the greater loading of the IP camera (sender).

4 1-2. Multicast: Multicast is a network communication between a single sender (IP camera, video server) and multiple receiver (Client PC or NVR) over a network. With multicast, the IP camera can send just one streaming and each client can receive the streaming. With multicast, even with the client number increasing, the network bandwidth is still the same and the same loading of the IP camera (sender) NOTE: The streaming transmitted by Multicast might be unstable and cause the images to either Drop frame or Generate mosaic when network is busy. This is because Multicast is using UDP protocol to transmit the data and the UDP protocol might cause some network package to loss during transmission Multicast with IGMP Multicast with IGMP can send streaming only to PC wanting to receive it.

5 2-1-2 Multicast without IGMP Multicast without IGMP send streaming to every PC on the network. If any of the sender (IP camera) and the related network switch/router doesn t support IGMP, the multicast with IGMP will not work. NOTE: Multicast without IGMP is very likely to decrease your network performance and cause a lot of trouble. Please don t use it.

6 Chapter2: How to make multicast work? Because the multicast with IGMP works best, we will describe how to deploy a system supporting multicast with IGMP as below. There are 4 setups deploy it. 1 st : Select the network switch/router. 2 nd : Configure the network switch/router. 3 rd : Configure the IP camera / video server. 4 th : Configure the software 2-1 Select the network switch/router Each of the network switches/routers in this system should support IGMP / Multicast routing. Otherwise the multicast will not work. Please refer to the page below. Switch: IGMP support required Router: Multicast Routing required

7 2-1-1 If the switch doesn t support IGMP The switch will send stream to every device connected to it.. If it doesn t support IGMP, then it sends stream to every device on it PC don t want stream but receive stream If the router doesn t support Multicast Routing The router will block the stream if it doesn t support Multicast Routing. If it doesn t support Multicast Routing, the multicast stream will be blocked

8 2-2 Configure each network switch/router There are two items much be set in the network switch /router. Because the configuration procedure of switch and router differs, please see the key items to setup and refer to switch / router s manual for details For Switch 1. The IGMP snooping must be Enabled 2. The IGMP Query must be Enabled For Router 1. The Multicast Routing must be Enabled 2-3 Connect and Setup the IP camera/video server Please follow the procedure below to connect and setup the IP camera Connect the IP camera/video server via WAN port Set the WAN port streaming type to Multicast Please follow the IP camera/video server s operation manual to login the IP camera /video server s web-configurator. Then go to video setting and set the streaming type to Multicast.

2-3-3 Set the IGMP to Enabled 2-3-4 Set the Multicast IP This setting is subject to

9 2-3-3 Set the IGMP to Enabled Set the Multicast IP This setting is subject to your network design. Please consult your MIS. The default multicast IP is

10 2-4 Setup the software For client to view the multicast images, below is the software available for the multicast. Software Web-configurator Streaming Explorer Streaming Activator NVR Support viewing via multicast NO NO Yes (version 1.37 and above) NO Please follow the software manual for how to configure them.

11 Chapter3: Glossary 3-1. IGMP: IGMP (Internet Group Management Protocol) is the standard for IP multicsting in the internet. It s used to establish host memberships in particular multicast groups on a single network. The mechanism of the protocol allow a host to inform its local router, using Host Membership Reports, that it wants to receive messages addressed to a specific multicast group.

Network setup and troubleshooting

ACTi Knowledge Base Category: Troubleshooting Note Sub-category: Network Model: All Firmware: All Software: NVR Author: Jane.Chen Published: 2009/12/21 Reviewed: 2010/10/11 Network setup and troubleshooting