Defining Storm Control - Cisco Small Business 200 Series Administration Manual

Security

Defining Storm Control

The TCP Service Table displays the following fields for each service:
• Service Name—Access method through which the device is offering the TCP service.
• Type—IP protocol the service uses.
• Local IP Address—Local IP address through which the device is offering the service.
• Local Port—Local TCP port through which the device is offering the service.
• Remote IP Address—IP address of the remote device that is requesting the service.
• Remote Port—TCP port of the remote device that is requesting the service.
• State—Status of the service.
The UDP Service table displays the following information:
• Service Name—Access method through which the device is offering the UDP service.
• Type—IP protocol the service uses.
• Local IP Address—Local IP address through which the device is offering the service.
• Local Port—Local UDP port through which the device is offering the service.
• Application Instance—The service instance of the UDP service. (For example, when two senders
send data to the same destination.)
Defining Storm Control
When Broadcast, Multicast, or Unknown Unicast frames are received, they are duplicated, and a copy is
sent to all possible egress ports. This means that in practice they are sent to all ports belonging to the
relevant VLAN. In this way, one ingress frame is turned into many, creating the potential for a traffic storm.
Storm protection enables you to limit the number of frames entering the device and to define the types of
frames that are counted towards this limit.
When the rate of Broadcast, Multicast, or Unknown Unicast frames is higher than the user-defined
threshold, frames received beyond the threshold are discarded.
To define Storm Control:
Cisco Small Business 200 Series Smart Switch Administration Guide
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