D-Link DGS-3120-24TC Product Manual - Page 150

xStack® DGS-3120 Series Managed Switch Web UI Reference Guide From Port / To Port Action Use the drop-down menu to select the port range to use for this configuration. Select the method of traffic control from the pull-down menu. The choices are: 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 Count Down 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 port recovers after 5 minutes automatically or the user manually resets the port using the Port Settings window (Configuration> Port Configuration> Port Settings). Choosing this option obligates the user to configure the Time Interval setting as well, which will provide packet count samplings from the Switch's chip to determine if a Packet Storm is occurring. Countdown (0 or 3-30) The Count Down 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 their Action field and therefore will not operate for hardware-based Traffic Control implementations. The possible time settings for this field are 0 and 3 to 30 minutes. To disable this feature select the Disable option. Time Interval (5-600) The Time 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. The Time Interval may be set between 5 and 600 seconds, with a default setting of 5 seconds. Threshold (0-255000) Specifies the maximum number of packets per second that will trigger the Traffic Control function to commence. The configurable threshold range is from 0-255000 with a default setting of 131072 packets per second. Traffic Control Type Specifies the desired Storm Control Type: None, Broadcast, Multicast, Unknown Unicast, Broadcast + Multicast, Broadcast + Unknown Unicast, Multicast + Unknown Unicast, and Broadcast + Multicast + Unknown Unicast. Traffic Trap Settings Enable sending of Storm Trap messages when the type of action taken by the Traffic Control function in handling a Traffic Storm is one of the following: None - Will send no Storm trap warning messages regardless of action taken by the Traffic Control mechanism. Storm Occurred - Will send Storm Trap warning messages upon the occurrence of a Traffic Storm only. Storm Cleared - Will send Storm Trap messages when a Traffic Storm has been cleared by the Switch only. Both - Will send Storm Trap messages when a Traffic Storm has been both detected and cleared by the Switch. This function cannot be implemented in the hardware mode. (When Drop is chosen for the Action parameter) Traffic Log Settings Use the drop-down menu to enable or disable the function. If enabled, the traffic control states are logged when a storm occurs and when a storm is cleared. If the log state is disabled, the traffic control events are not logged. Traffic Auto Recover Time (0-65535) Enter the time allowed for auto recovery from shutdown for a port. The default value is 0, which means there is no auto recovery and the port remains in shutdown forever mode. This requires manual entry of the CLI command config ports [ | all ] state enable to return the port to a forwarding state. Click the Apply button to accept the changes made for each individual section. 142