Allied Telesis AT-S62 - Manual (Page 107)

AT-S62 User’s Guide
Section I: Basic Operations 107
Setting the Rate Limit
This feature allows you to set the maximum number of ingress packets
the switch ports accept each second. Packets exceeding the threshold
are discarded. You can enable the rate limiting threshold independently
for multicast, broadcast, and unknown unicast packets. However, the
same threshold applies to all packet types.
To configure this feature, you must enter a rate limit. This establishes the
maximum number of packets the individual ports will accept per
second. This limit applies to all ports and to all three packet types. There
can be only one packet limit value for the switch.
Here is an example. Assume that you set a rate limit of 5,000 packets and
you enable multicast and broadcast rate limiting. Each switch port will
each accept up to 5,000 ingress multicast packets and 5,000 ingress
broadcast packets each second. If a port receives more than that of
either type, it discards the extra packets. Since the feature was not
activated for unknown unicast packets, the ports do not restrict their
number. (An unknown unicast packet is a packet with a MAC address not
stored in the switch’s MAC address table.)
To set rate limiting, perform the following procedure:
1. From the Main Menu, type 1 to select Port Configuration.
The Port Configuration menu is shown in Figure 20 on page 95.
2. From the Port Configuration menu, type 1 to select Port
Configuration.
The following prompt is displayed:
Enter port-list ->
3. Enter any port on the switch.
This feature cannot be set on a per-port basis. You can enter any
port or range of ports and the change will apply to all switch ports.
The Port Configuration menu is shown in Figure 22 on page 98.
4. Type L to select Rate Limit.