Reference Guide
56
Storm Control
The Dell Networking OS storm control feature allows you to limit or suppress traffic during a traffic storm
(Broadcast/Unknown Unicast Rate Limiting or Multicast).
The S5000 switch supports storm control.
Important Points to Remember
• Interface commands can only be applied on physical interfaces (virtual local area networks [VLANs]
and link aggregation group [LAG] interfaces are not supported).
• An INTERFACE-level command only supports storm control configuration on ingress.
• An INTERFACE-level command overrides any CONFIGURATION-level ingress command for that
physical interface, if both are configured.
• You can apply the CONFIGURATION-level storm control commands at ingress or egress and are
supported on all physical interfaces.
• When storm control is applied on an interface, the percentage of storm control applied is calculated
based on the advertised rate of the stack-unit. It is not based on the speed setting for the stack-unit.
• Do not apply per-VLAN quality of service (QoS) on an interface that has storm control enabled (either
on an interface or globally).
• When you enable broadcast storm control on an interface or globally on ingress, and DSCP marking
for a DSCP value 1 is configured for the data traffic, the traffic goes to queue 1 instead of queue 0.
• Similarly, if you enable unicast storm control on an interface or globally on ingress, and DSCP marking
for a DSCP value 2 is configured for the data traffic, the traffic goes to queue 2 instead of queue 0.
NOTE: Bi-directional traffic (unknown unicast and broadcast) along with egress storm control
causes the configured traffic rates to be split between the involved ports. The percentage of traffic
that each port receives after the split is not predictable. These ports can be in the same/different
port pipes or the same/different stack-units.
show storm-control broadcast
Display the storm control broadcast configuration.
S5000
Syntax
show storm-control broadcast [interface-type slot/port]
Parameters
interface-type
slot/port
(OPTIONAL) Enter one of the following keywords followed
by slot/port information to display the interface specific
Storm Control
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