DES-3028 DES-3028P DES-3028G DES-3052 DES-3052P Layer 2 Fast Ethernet Switch CLI Reference Manual
95
config traffic control
detected on the Switch. The user has two options:
drop
Utilizes the hardware Traffic Control mechanism, which
means the Switch’s hardware will determine the Packet Storm
based on the Threshold value stated and drop packets until the
issue is resolved.
shutdown
Utilizes the Switch’s software 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
Rest mode and is no longer operational until (1) auto-recovery
after 5 minutes or (2) the user manually resets the port using the
config ports 1 state disable
and
config ports 1 state enable
command. 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 64-1000000>
The upper threshold at which the
specified traffic control is switched on. The
<value>
is the number of
broadcast/multicast/Unknown unicast packets, in Kbits per second
(Kbit/sec), received by the Switch that will trigger the storm traffic control
measures. The default setting is 64 Kbit/sec.
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.
secs 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.
minutes 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 rest
mode and can only be manually recovered using the config
ports command mentioned previously in this manual.
Restrictions
Only Administrator-level users can issue this command.
Example usage:
To configure traffic control and enable broadcast storm control for ports 1-12:
DES-3028P:4# config traffic control 1-12 broadcast enable
action shutdown threshold 64 countdown 10 time_interval 10
Command: config traffic control 1-12 broadcast enable
action shutdown threshold 64 countdown 10 time_interval 10
Success.
DES-3028P:4#
