Network Stability Through Broadcast Storm Control in Loop Scenarios

Zyxel_Nami
Zyxel_Nami Posts: 474  Zyxel Employee
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When a network loop occurs, as illustrated between Switch 1 (SW 1) and Switch 2 (SW 2), there is a risk of broadcast traffic being multiplied, which can overload the switch's CPU and disrupt network operations.

Enabling Broadcast Storm Control on a port that participates in the loop — for example, port 9 on SW 1 — provides a safeguard by setting a threshold for broadcast, multicast, and DLF traffic. This control measure prevents the CPU of SW 1 from processing more broadcast traffic than it can handle, avoiding overutilization and potential network failure.

Regular traffic, such as communications from SW 1 to PC A, is not affected by this control and continues to flow normally. By doing so, Broadcast Storm Control allows vital network functions to proceed without interruption while containing the problematic loop traffic.

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