SWT
GIGABIT/FAST ETHERNET SWITCH TYPE SWT
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USER GUIDE - M0SWTA1903Iv09 - V09 March 2019
Forward All Groups:
The equipment allows manual configuration of this special address individually for each
interface.
•
#.
It establishes the equipment physical port number.
•
Forward All.
Indicates the status of the special group address for the
corresponding interface. Valid values are
Normal
,
Fixed
and
Forbidden
. The
Normal
option is the default option. It indicates that the spread or not of the
multicast traffic is subjected to there being a client equipment that requested the
register for the group address. The
Fixed
option means that the interface will
propagate all multicast traffic, and GMRP messages concerning the group address
is ignored. The
Forbidden
option assumes that requests won´t be accepted by the
client equipment for the group address, and that only the multicast traffic registered
in the interface will be treated.
5.13.3
IGMP
The IGMP Snooping is an optimization to be used in level 2 equipment, such as the SWT.
The IGMP protocol is level 3; therefore, the IGMP Snooping operation performed by the
switch is conditioned by the presence of a Multicast router in the network.
The SWT includes a special feature if there is NO multicast router in the network, and if the
IGMP Snooping operation has to be active. Said feature implies that the switch itself
emulates the presence of a multicast router, by periodically consulting the clients about
belonging to the different multicast diffusion groups.
The configuration parameters are the following:
IGMP:
There is a single parameter that determines whether the emulation as IGMP router is active
or not:
•
Enable.
A simple
CheckBox
parameter to indicate if the IGMP periodic consultation
service is active or not.
