D-Link DES-1228 - Page 104

DES-1228/ME Layer 2 Metro Ethernet Switch CLI Reference Manual
99
config traffic control
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 co
nfig 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-1228/ME: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 shutdow
n threshold 64
countdown 10 time_interval 10
Success.
DES-1228/ME:4#
show traffic control
Purpose Used to display current traffic control settings.
Syntax
show traffic control { <portlist> }
Description This command displays the current storm traffic control configuration on the Switch.
Parameters
<portlist> − Used to specify port or list of ports for which to display traffic control settings.
The beginning and end of the port list range are separated by a dash.
Restrictions None.