Allied Telesis AT-S101 - Manual (Page 120)

Chapter 10: Bandwidth Control
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Overview
The bandwidth control feature allows you regulate the reception rate of
broadcast, multicast, and destination lookup failure packets. The AT-S101
software allows you to set separate limits for each port beyond which each
of the different packet types are discarded. Each setting can be configured
on individual ports or on all of the ports of the AT-GS950/8POE switch.
Traffic is measured in packets per second. See the following definitions for
more information about these settings.
ˆ Destination Lookup Failure-- The Destination Lookup Failure (DFL)
setting is concerned with comparing the destination MAC address of a
packet received by the switch to the forwarding database. When an
AT-GS950/8POE switch receives a packet, it scans the forwarding
database and looks for a match to the destination MAC address in the
received packet. If the MAC address is not present in the forwarding
database, then the packet is flooded according to the VLAN ingress
and egress rules. By default, this setting is disabled on the switch
which means that all DLF packets are automatically forwarded
according to the VLAN ingress and egress rules.
ˆ Broadcast Setting-- The broadcast setting applies to allowing or
denying broadcast packets on each port.
ˆ Multicast Setting-- The multicast setting applies to allowing or denying
multicast packets on each port.
ˆ Threshold Level-- In regards to Bandwidth control, the threshold level
is the number of DFL, broadcast, and multicast packets that are sent
by or received from a port. This value is measured in packets per
second. You can set the threshold level to low, medium, or high.