D-Link DES-3828 Product Manual - Page 95

xStack DES-3800 Series Layer 3 Stackable Fast Ethernet Managed Switch CLI Manual config traffic control Unicast - Enable or disable unknow packet strom control . (Only support HW storm control) action - Used to configure the action taken when a storm control has been 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 Shutdown Forever mode and is no longer operational until the user manually resets the port using the config ports 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 − The upper threshold at which the specified traffic control is switched on. The is the number of broadcast/multicast/Unicast packets, in packets per second (pps), received by the Switch that will trigger the storm traffic control measures. The default setting is 128000. 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 can only be manually recovered using the config ports command mentioned previously in this manual. Restrictions Only Administrator or Operator-level users can issue this command. 91