Storm Control Configuration
73
Storm Control Configuration
The Storm Control feature protects against conditions where incoming packets flood the LAN, causing
network performance degradation. The software includes Storm Control protection for unicast traffic
with an unknown destination, and for broadcast and multicast traffic. When enabled, the storm control
threshold is automatically set to 5% of port speed. If the incoming rate of unicast (with unknown desti-
nation), multicast, or broadcast packets exceeds this value, the port moves to the diagnostically dis-
abled state and remains in that state until it is re-enabled by the Auto Recovery feature. Storm Control
functionality is applicable only for physical interfaces.
When Auto Recovery is enabled, an interface in the diagnostically disabled state due to a storm is
recovered (link up) when the recovery interval expires. If the interface continues to encounter exces-
sive traffic, it may be placed back into the diagnostically disabled state, and the interface will be dis-
abled (link down). An interface in the diagnostically disabled state may also be manually recovered by
enabling it from the Port Status page (see
“Port Status” on page 25
).
To display the Storm Control Configuration page, click
Security
>
Storm Control
in the navigation
pane.
Figure 47. Storm Control Configuration Page
