Allied Telesis AT-S62 - Manual (Page 77)

AT-S62 Management Software Web Browser Interface User’s Guide
Section I: Basic Operations 77
The Limit field specifies the number of cells. A cell represents 64 bytes.
The range is 1 to 57,344 cells. The default is 57,344.
Unknown Multicast Filtering
Discards all unknown ingress multicast packets on a port when
activated. This feature can help improve switch performance in
instances where a multicast stream arrives on a port of a switch where
there are no host nodes. Without the feature, the unknown multicast
packets would be flooded out all ports of the same VLAN as the
ingress port. With the feature, the unknown multicast packets are
discarded at the ingress port, reducing the number of packets that the
switch must forward. The default setting is disabled.
A dynamic multicast address is added to the address table only after a
host node responds with a request to join the group. Consequently, it is
possible to activate this feature on a port and have it filter the packets
even after the port has started receiving a multicast stream.
This feature does not filter multicast queries.
The possible settings are:
Enabled - The port discards all ingress unknown multicast packets.
Disabled - The port forwards all ingress unknown multicast packets.
This is the default setting.
MDI/MDIX Crossover
Use this selection to set the wiring configuration of the port. The
configuration can be Auto, MDI, or MDI-X. The default setting is Auto.
The default Auto setting activates the auto-MDI/MDI-X feature on a
port, which enables a port to configure itself automatically as MDI or
MDI-X when connected to an end node. This allows you to use a
straight-through twisted pair cable when connecting any type of
network device to a port on the switch.
The Auto setting is only available when a port is set to Auto-Negotiate
its speed and duplex mode. It is also the only setting available when a
port’s speed and duplex are set through Auto-Negotiation.
The auto-MDI/MDI-X feature is not available if you disable Auto-
Negotiation on a port and set a port’s speed and duplex mode
manually. A port where Auto-Negotiation has been disabled defaults to
MDI-X. Disabling Auto-Negotiation may require that you manually
configure a port’s MDI/MDI-X setting using this option or use a
crossover cable.
7. When you are finished entering your changes, click Apply. The switch
activates the parameter changes on the port.
8. To permanently save the changes, select the Save Config menu
option.