3Com 2928 - Baseline Plus Switch PWR, Руководство пользователя

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Storm Constrain Configuration
Overview
The storm constrain function limits traffic of a port within a predefined upper threshold to suppress
packet storms in an Ethernet. With this function enabled on a port, the system detects the amount of
broadcast traffic, multicast traffic, and unicast traffic reaching the port periodically. When a type of traffic
exceeds the threshold for it, the function, as configured, blocks or shuts down the port, and optionally,
sends trap messages and logs.
Alternatively, you can configure the storm suppression function to control a specific type of traffic. As
the storm suppression function and the storm constrain function are mutually exclusive, do not enable
them at the same time on an Ethernet port. For example, with broadcast storm suppression enabled on
a port, do not enable storm constrain for broadcast traffic on the port. The storm suppression function is
configured in
Device
>
Port Management
. For details, refer to
Port Management
.
With storm constrain enabled on a port, you can specify the system to act as follows when a certain type
of traffic (broadcast, multicast, or unicast) exceeds the corresponding upper threshold:
z
Block: Block the port. In this case, the port is blocked and thus stops forwarding the traffic of this
type until the type of traffic drops down below the lower threshold. Note that a port blocked by the
storm constrain function can still forward other types of traffic and collect statistics for the blocked
traffic.
z
Shutdown: Shut down the port. In this case, the port is shut down and stops forwarding all types of
traffic. To bring up the port, select
Device
>
Port Management
to configure the port, or cancel the
storm constrain setting on the port.
Configuring Storm Constrain
Setting the Traffic Statistics Generating Interval
Select
Device
>
Storm Constrain
from the navigation tree to enter the page shown in Figure 1-1 . In the
Interval for generating traffic statistics
text box, input the traffic statistics generating interval for
storm constrain.