Configuring Traffic Storm Control; About Traffic Storm Control - Cisco Nexus 9000 Series Configuration Manual

Configuring Traffic Storm Control

This chapter describes how to configure traffic storm control on the Cisco NX-OS device.
This chapter includes the following sections:
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About Traffic Storm Control

A traffic storm occurs when packets flood the LAN, creating excessive traffic and degrading network
performance. You can use the traffic storm control feature to prevent disruptions on Layer 2 ports by a
broadcast, multicast, or unicast traffic storm on physical interfaces.
Traffic storm control (also called traffic suppression) allows you to monitor the levels of the incoming broadcast,
multicast, and unicast traffic over a 3.9-millisecond interval. During this interval, the traffic level, which is a
percentage of the total available bandwidth of the port, is compared with the traffic storm control level that
you configured. When the ingress traffic reaches the traffic storm control level that is configured on the port,
traffic storm control drops the traffic until the interval ends.
This table shows the broadcast traffic patterns on a Layer 2 interface over a given interval. In this example,
traffic storm control occurs between times T1 and T2 and between T4 and T5. During those intervals, the
amount of broadcast traffic exceeded the configured threshold.
About Traffic Storm Control, on page 431
Licensing Requirements for Traffic Storm Control, on page 432
Guidelines and Limitations for Traffic Storm Control, on page 433
Default Settings for Traffic Storm Control, on page 434
Configuring Traffic Storm Control, on page 434
Verifying Traffic Storm Control Configuration, on page 436
Monitoring Traffic Storm Control Counters, on page 436
Configuration Examples for Traffic Storm Control , on page 436
Additional References for Traffic Storm Control, on page 437
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