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FTOS Configuration Guide for the C-Series - Force10 Networks

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Chapter 28 Storm Control<br />

Storm Control is supported on plat<strong>for</strong>ms: c e s<br />

Storm Control <strong>for</strong> Multicast is supported only on plat<strong>for</strong>ms: e s<br />

The storm control feature enables you to control unknown-unicast and broadcast traffic on Layer 2 and<br />

Layer 3 physical interfaces.<br />

<strong>FTOS</strong> Behavior: On E-<strong>Series</strong>, bi-directional traffic (unknown unicast and broadcast) along with egress<br />

storm control causes <strong>the</strong> configured traffic rates to be split between <strong>the</strong> involved ports. The percentage<br />

of traffic that each port receives after <strong>the</strong> split is not predictable. These ports can be in <strong>the</strong> same/<br />

different port-pipes or on <strong>the</strong> same/different line cards.<br />

<strong>FTOS</strong> Behavior: On <strong>the</strong> E-<strong>Series</strong>, <strong>FTOS</strong> supports broadcast control <strong>for</strong> Layer 3 traffic only. To control<br />

Layer 2 broadcast traffic use <strong>the</strong> command storm-control unknown-unicast. On <strong>the</strong> C-<strong>Series</strong> and<br />

S-<strong>Series</strong>, <strong>FTOS</strong> supports broadcast control (command storm-control broadcast ) <strong>for</strong> Layer 2 and<br />

Layer 3 traffic.<br />

Configure Storm Control<br />

Storm control is supported in INTERFACE mode and CONFIGURATION mode<br />

Configure storm control from INTERFACE mode<br />

Configure storm control from INTERFACE mode using <strong>the</strong> command storm control. From INTERFACE<br />

mode:<br />

• You can only on configure storm control <strong>for</strong> ingress traffic.<br />

• If you configure storm control from both INTERFACE and CONFIGURATION mode, <strong>the</strong><br />

INTERFACE mode configurations override <strong>the</strong> CONFIGURATION mode configurations.<br />

• The percentage of storm control is calculated based on <strong>the</strong> advertised rate of <strong>the</strong> line card, not by <strong>the</strong><br />

speed setting.<br />

Configure storm control from CONFIGURATION mode<br />

Configure storm control from CONFIGURATION mode using <strong>the</strong> command storm control. From<br />

CONFIGURATION mode you can configure storm control <strong>for</strong> ingress and egress traffic.<br />

<strong>FTOS</strong> <strong>Configuration</strong> <strong>Guide</strong>, version 7.7.1.0 581

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