Multicast - Funkwerk W1002 Manual

12 Routing
200
Fields in the Load Balancing Groups Interface Selection for Distribution menu
Field
Interface
Distribution Ratio

12.5 Multicast

What is multicasting?
Many new communication technologies are based on communication from one sender to
several recipients. Therefore, modern telecommunication systems such as voice over IP or
video and audio streaming (e.g. IPTV or Webradio) focus on reducing data traffic, e.g. by
offering TriplePlay (voice, video, data). Multicast is a cost-effective solution for effective use
of bandwidth because the sender of the data packet, which can be received by several re-
cipients, only needs to send the packet once. The packet is sent to a virtual address
defined as a multicast group. Interested recipients log in to these groups.
Other areas of use
One classic area in which multicast is used is for conferences (audio/video) with several re-
cipients. The most well-known are probably the MBone Multimedia Audio Tool (VAT),
Video Conferencing Tool (VIC) and Whiteboard (WB). VAT can be used to hold audio con-
ferences. All subscribers are displayed in a window and the speaker(s) are indicated by a
black box. Other areas of use are of particular interest to companies. Here, multicasting
makes it possible to synchronise the databases of several servers, which is valuable for
multinationals or even companies with just a few locations.
Address range for multicast
For, IPv4 the IP addresses 224.0.0.0 to 239.255.255.255 (224.0.0.0/4) are reserved for
Funkwerk Enterprise Communications GmbH
Description
Select the interfaces that are to belong to the group from the
available interfaces.
Enter the percentage of the data traffic to be assigned to an in-
terface.
The meaning differs according to the Distribution Policy used:
• Based on the number of sessions to be distributed for Ses-
sion-Round-Robin.
• For Bandwidth Load Dependent the data rate is the de-
cisive factor.
bintec W1002/W1002n/W2002/WIx040/WIx065