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PROmesh P20 - User Manual
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connected as loopback via a point-to-point connection or a bridge with two or more connections
to a common LAN segment.
o
Deactivated port: A port that has no operational function in the tree structure.
Status
: Displays the current status of the individual ports. A difference is made here between:
o
Blocking: rejects packages; learns no addresses; receives and processes BPDUs
o
Listening: rejects packages; learns no addresses; receives, processes and transmits BPDUs
o
Learning: rejects packages; learns addresses; receives, processes and transmits BPDUs
o
Forwarding: forwards packages; learns addresses; receives, processes and transmits BPDUs
o
Disabled: rejects packages; learns no addresses; receives and processes no BPDUs
3.7.4 IGMP snooping
The Internet Group Management Protocol (IGMP) is a protocol of the Internet protocol family. When the
IGMP Snooping function (
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) is active, the switch
listens to the multicast traffic in the network. Thus it need not output incoming multicasts to all ports, but
can instead send them only to the ports for which the respective multicast is relevant. Additionally, at one
of its ports, the
PROmesh P20
can output all the information it gained through IGMP snooping. This can
e.g. be applied when a new switch is installed in the network.
The Host Aging Time determines how long collected information is stored in the switch. This time is reset
when the respective device answers an IGMP query again.
Figure 22: IGMP Snooping
Static multicast
In this menu, you can manually order forwarding of multicast packages. To do so, the following settings
have to be configured:
VLAN ID: Enter the VLAN ID to which the multicast is to be forwarded.
Multicast Address: Enter a multicast address. Packages that are sent to this address are forwarded
via the selected ports.
Port List: Multicast packages are forwarded via ports selected here.
