Multicast; Groups - Siemens SCALANCE XM-400 Configuration Manual

Table 2 has the following columns:
● Port
All available ports are listed in this column. Unavailable ports are not displayed.
● Setting
Enable or disable the blocking of unicast frames.
Steps in configuration
Enabling blocking for an individual port
1. Select the check box in the relevant row in table 2.
2. To apply the changes, click the "Set Values" button.
Enabling blocking for all ports
1. In the "Setting" drop-down list, select the "Enabled" entry.
2. Click the "Copy to table" button. The check box is enabled for all ports in table 2.
3. To apply the changes, click the "Set Values" button.
5.5.17

Multicast

5.5.17.1

Groups

Multicast applications
In the majority of cases, a frame is sent with a unicast address to a particular recipient. If an
application sends the same data to several recipients, the amount of data can be reduced by
sending the data using one multicast address. For some applications, there are fixed multicast
addresses (NTP, IETF1 Audio, IETF1 Video etc.).
Reducing network load
In contrast to unicast frames, multicast frames represent a higher load for the device.
Generally, multicast frames are sent to all ports. There are three ways of reducing the load
caused by multicast frames:
● Static entry of the addresses in the multicast filter table.
● Dynamic entry of the addresses by listening in on IGMP/MLD parameter assignment frames
(IGMP/MLD configuration).
● Active dynamic assignment of addresses by GMRP frames.
The result of all these methods is that multicast frames are sent only to ports for which an
appropriate address is entered.
The "Multicast" menu item, shows the multicast frames currently entered in the filter table and
their destination ports that the user set in the parameters (static).
SCALANCE XM-400/XR-500 Web Based Management (WBM)
Configuration Manual, 05/2017, C79000-G8976-C248-12
Configuring with Web Based Management
5.5 The "Layer 2" menu
321