Every Hikvision device has access limit. If the total number of people trying to visit and preview the device (recorder such DVR or NVR or even a standalone IP camera) via the Internet is more than the limit, the rest would be unable to preview. In order to avoid this phenomenon, we can configure the device with a multicast IP and try to access the device through multicast protocol. This article will teach you how to do the configuration of Multicast for Hikvision NVR or DVR.

Preparation
1. Download the plug-in in the web browser.
2. Download iVMS-4200 and install it on PC.
3. A switch which supports multi-casting function.
Note: a) If a different version of iVMS-4200 has been installed on the PC, please uninstall it first via Install Shield Wizard and delete the file folder which was created during previous installation process. b) Different IPC requires different multicast IP addresses.
c) The multicast IP configured in the IP camera belongs to multicast group.

How to configure multicast via IE (Internet Explorer)

Step: 1. Access to the device via browser. Type your username and password.

Step: 2. Select Configuration > Network > Basic Settings > TCP/IP > Lan. Fill in the Multicast Address.

Step: 3. Select Configuration >Local > Live View Parameters, select MULTICAST.

How to configure multicast via iVMS-4200

Step: 1. Enter Device Management interface.

Step: 2. Select one online device and click the Add to Client button. Type in the Nickname, IP address, Port, Username and Password (if the device is registered with HiDDNS, then the Device Domain Name and Server Name are required, click the checkbox of Export to group and click the Add button to add the device into iVMS-4200.

Step 3: Select the device and click Remote Configuration-> Configuration-> General-> fill in the Multicast Address.

Step: 4. Select the device and click Group > Device group > Encoding channel > Modify > Protocol Type > select MCAST.

Step: 5. If there is someone else trying to live view the device via iVMS-4200, just repeat step

How to configure multicast locally

Select Menu >vConfiguration >Network >More Settings, fill in the Multicast.

Multicast versus Stream Media Server. Both multicast and stream media servers are used to decrease the pressure getting stream from the device with great effects. One of the disadvantages of multicast preview is that the switch must support multicast function. Make sure your switch supports multicasting.