Hirschmann GREYHOUND GRS1020, Справочное руководство

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Network load control
10.2 Multicasts
119
UM Config GRS
Release 8.0 09/2019
Prerequisite:
The
IGMP Snooping
function is enabled globally.
Perform the following steps:
Configure Multicasts
The device lets you configure the exchange of Multicast data packets. The device provides different
options depending on whether the data packets are to be sent to unknown or known Multicast
receivers.
The settings for unknown Multicast addresses are global for the entire device. The following options
can be selected:

The device discards unknown Multicasts.

The device forwards unknown Multicasts to every port.

The device forwards unknown Multicasts only to ports that have previously received query
messages (query ports).
Note: The exchange settings for unknown Multicast addresses also apply to the reserved IP
addresses from the “Local Network Control Block” ( 224.0.0.0..224.0.0.255 ). This behavior can
affect higher-level routing protocols.
For each VLAN, you specify the sending of Multicast packets to known Multicast addresses
individually. The following options can be selected:

The device forwards known Multicasts to the ports that have previously received query
messages (query ports) and to the registered ports. Registered ports are ports with Multicast
receivers registered with the corresponding Multicast group. This option helps ensure that the
transfer works with basic applications without further configuration.

The device forwards known Multicasts only to the registered ports. The advantage of this setting
is that it uses the available bandwidth optimally through direct distribution.

Open the Switching > IGMP Snooping > Snooping Enhancements dialog.

Double-click the desired port in the desired VLAN.

To activate one or more functions, select the corresponding options.

Click the Ok button.

To save the changes temporarily, click the button.
enable Change to the Privileged EXEC mode.
vlan database Change to the VLAN configuration mode.
igmp-snooping vlan-id 1 forward-all 1/1 Activate the
Forward All
function for port
1/1
in
VLAN
1
.