Operating Manual
MAN_EL-1000-4GM
Version:
2.6.1
/ 01.02.2021
Authorized by:
T.W.
Page 55 of 77
5.9
Switching
The switching screen offers an overview of activated and deactivated functions in the switching area.
Aging Time: This indicates the period of time during which a MAC address remains after removal
from the port or switching of the device. You can select values between 16 and 4080 seconds in steps
of 16 seconds. The default value is 304 seconds.
5.9.1
IGMP Snooping
The Internet Group Management Protocol (IGMP) is used by switches, routers, and hosts to set up
multi-cast groups. If IGMP is activated, multi-cast data traffic does not need to be sent to every
individual multi-cast receiver, but rather only to each group. This severely reduces the network load.
IGMP snooping works on Layer 3 of the OSI model and is extended by the Layer 2 protocol IGMP
snooping (Figure 19). IGMP snooping listens to the IGMP data traffic and learns via which ports the
multi-cast data must be sent.
IGMP snooping settings
The following settings are displayed and can be adjusted:
VLAN ID: IGMP snooping operates on VLAN basis and can be activated for each individual VLAN
ID.
Fast Leaver: If a multi-cast group should be removed, then there is normally a query whether
no subscriber is really available in the group (query message). Fast Leaver is a port that removes
a multi-cast group without any additional query. This setting is interesting for ports that are only
connected with one multi-cast receiver.
Learned Ports: Shows which ports are connected with multi-cast receivers and which ports
should be forwarded the corresponding multi-cast data.
Static Ports: Freely configurable ports that should always receive multi-cast data independent
of IGMP messages.
VLAN name: The name of VLANs.