DES-3000 Series Layer 2 Switch CLI Reference Manual
102
config traffic control
mechanism to determine the Packet Storm occurring. Once
detected, the port will deny all incoming traffic to the port except
STP BPDU packets, which are essential in keeping the Spanning
Tree operational on the Switch. If the countdown timer has expired
and yet the Packet Storm continues, the port will be placed in
Shutdown Forever mode and is no longer operational until the user
manually resets the port. Choosing this option obligates the user to
configure the time_interval field as well, which will provide packet
count samplings from the Switch’s chip to determine if a Packet
Storm is occurring.
threshold <value 64-1024000> The upper threshold at which the specified
traffic control is switched on. The <value> is the number of
broadcast/multicast/unicast packets, in Kilo bits per second (Kbps), received
by the Switch that will trigger the storm traffic control measures. The default
setting is 64.
time_interval – The Interval will set the time between Multicast and Broadcast
packet counts sent from the Switch’s chip to the Traffic Control function.
These packet counts are the determining factor in deciding when incoming
packets exceed the Threshold value.
sec 5-30 – The Interval may be set between 5 and 30 seconds with the
default setting of 5 seconds.
countdown – The countdown timer is set to determine the amount of time, in
minutes, that the Switch will wait before shutting down the port that is
experiencing a traffic storm. This parameter is only useful for ports configured
as shutdown in the action field of this command and therefore will not
operate for Hardware based Traffic Control implementations.
0 – 0 is the default setting for this field and 0 will denote that the port will
never shutdown.
minutes 5-30 – Select a time from 5 to 30 minutes that the Switch will
wait before shutting down. Once this time expires and the port is still
experiencing packet storms, the port will be placed in shutdown forever
mode and then needs to be manually recovered.
Restrictions Only Administrator-level users can issue this command.
Example usage:
To configure traffic control and enable broadcast storm control system wide:
DES-3026:4#config traffic control all
broadcast enable
Command: config traffic control all broadcast
enable
Success.
DES-3026:4#
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