Rockwell Automation 1783-Mxxx Stratix 8000 and 8300 Ethernet Managed Switches User Manual - Manual (Page 154)

154 Rockwell Automation Publication 1783-UM003I-EN-P - March 2014
Chapter 5 Manage the Switch via the Studio 5000 Environment
Port Thresholds
(storm control) Set the threshold limits for broadcast, unicast, and multicast traffic for each active
port on the Advanced - Port Thresholds tab. The number of packets sent is
compared against the threshold value. These limits help to prevent a single device
from sending too much traffic.
Field Description
Unit Indicates where the port resides:
• Base (for example, 1783-MS10T).
• Expansion module (for example, 1783-MX08T).
Port Indicates the port selected for configuration.
The port number includes the port type (Fa for Fast Ethernet and Gi for Gigabit Ethernet), the base or expansion module
number (1, 2, or 3), and the specific port number. For example:
• Gi1/1 is Gigabit Ethernet port 1 on the base.
• Fa2/1 is Fast Ethernet port 1 on the first expansion module.
Storm Control Threshold Settings Set the threshold values for the broadcast, unicast, and multicast traffic for each port. The number of packets being sent is
compared against the threshold value. If an undesirable network event occurs and the threshold value has been exceeded, a
yes value is displayed in the appropriate column in the Port Status tab and in the Traffic Exceeded on Any Port parameter in
the Switch for Automation Status tab. Network traffic of the type that exceeded threshold (broadcast, unicast, or multicast) is
dropped until it falls below the falling threshold. The falling threshold is automatically set to 5% less then the entered
threshold value.
Broadcast, Unicast and Multicast Complete these fields for each traffic type:
• Enable—Check to enable the storm control on the selected port. The respective threshold value and units are applied to
the selected port when you click Set. Clear the checkbox to disable the storm control for the selected port. Zero (0) is
applied to the threshold value and units attributes when you click Set.
• Threshhold—Type the value for the threshold after you choose the unit of measurement:
– If Units is set to pps or bps, type a value between 0…10000000000.
– If Units is set to %, type a value between 0…100.
• Units—Choose the unit of measurement for the threshold:
– pps (packets per second)
– bps (bits per second)
– %