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154 C2630M-B (4/08)
WORKING WITH MULTICASTING
The DX8100 supports a layer 2 multicast feature that allows the multicast and unicast mode to co-exist. In this case, the DX8100 Web Client and
DX8100 Client software can connect to a DX8100 server simultaneously. The recommended multicasting IP range is from 224.0.1.1 to
224.0.1.253. If the DX8100 server is not configured to operate in the multicast mode, then the DX8100 network automatically uses the unicast
protocol.
The DX8100 layer 2 multicast feature conserves bandwidth and reduces network traffic by simultaneously delivering one stream of data to an
unlimited number of connections.
This section describes the DX8100 layer 2 multicasting feature and is organized into the following topics:
• Multicast Requirements
• Enabling Multicasting on page 154
Multicast Requirements
The DX8100 multicast feature has the following requirements:
Enabling Multicasting
The recommended multicasting IP range is from 224.0.1.1 to 224.0.1.253.
To enable multicasting:
1. In the Network page, click the check box labeled Enable Multicasting.
2. In the Multicast Group IP text box, enter the multicast group IP address.
Figure 132. Enabling Multicasting
3. Click Apply. The DX8100 message dialog box opens, prompting you to restart the DX8100.
Table AP. DX8100 Multicast Requirements and Operation
Item Description
Network equipment The switch or router must support layer 2 multicasting.
Network requirements • The DX8100 Web Client establishes multicast connections with DX8100 servers in its own VLAN.
• The network must support Internet Group Management Protocol (IGMP).
• The number of DX8100 Web Client connections is unlimited.
Operation • Initially, the DX8100 Web Client uses the IP address of the target DX8100 server (using the TCP port) to
establish a connection to the DX8100. After the connection is established, the session switches from
using TCP to using User Data Protocol (UDP).
• Since the Web Client connection is using UDP, the user does not have to log in or out of the DX8100
server. The Web Client displays the connection status: connected or disconnect.
• The PTZ feature is not available.
• The Web Client displays only the camera name in the site tree. All other camera recording details, such
as the recording mode, resolution, recording rate, and so forth are not displayed.
• The camera name and DX8100 server information is not updated until a new connection to the DX8100
is initiated.
• The Web Client monitors the UDP socket every 10 seconds to ensure that live data is being received. If
live data is not received within 30 seconds, the Web Client will disconnect from the DX8100 server after
two minutes and automatically reconnect to the DX8100.