Allied-telesis AT-S62 Bedienungsanleitung PDF herunterladen (Seite 106)

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Chapter 6: Port Parameters

Section I: Basic Operations 106

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 activate multicast and broadcast rate limiting. Each switch port will

accept up to 5,000 ingress multicast packets and 5,000 ingress broadcast

packets each second. If a port receives more of either type, it discards the

extra packets. Since the feature was not activated for unknown unicast

packets, 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 94.

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 97.

4. Type L to select Rate Limit.

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