How to Configure Storm Control on Dell EMC Networking N Series Switch
Summary: How to Configure Storm Control on Dell Networking N Series Switch
Symptoms
This article discusses the steps to configure storm control on Dell Networking N series switch.
Storm Control
- A traffic storm happens when packets flood the LAN network, creating excessive traffic and reduce network performance. The storm control feature prevents LAN ports from being disrupted by a unicast, multicast, or broadcast storm on physical interfaces.
- On each interface, a maximum threshold can be configured in packets or as a percentage of the total interface bandwidth.
- If incoming traffic of the specified type (Unicast, Multicast or Broadcast) exceeds its threshold during a polling interval (1 second), traffic is blocked until the incoming rate drops below the configured falling interval.
- The two actions available if the threshold is breached are to shutdown the interface or to send a SNMP trap message.
- Action shutdown - Places the interface in the D-disable state if the threshold is exceeded.
- Action trap - Logs a message and issue a trap if the threshold is exceeded.
Unicast storm control can only be enabled on Ethernet interfaces. It cannot be configured on port channels
Commands to implement Storm Control
| Command | Description |
| console#configure | To get into global configuration mode |
| console(configure)#interface gigabitethernet/tengigabitethernet unit/slot/port | Configure a port in interface mode |
| console(config-if-Gix/x/x)#storm-control broadcast/multicast/unicast action (option) | Option to Shutdown the interface or send a trap message if the threshold is exceeded. |
| console(config-if-Gix/x/x)#storm-control broadcast/multicast/unicast level (option) | Setting the threshold as percentage of port speed (1-100). |
| console(config-if-Gix/x/x)#storm-control broadcast/multicast/unicast rate (option) | Setting the threshold in Packets/second (1-14880000) |
Either the level or the rate threshold may be configured, but not both.
Storm Control Configuration Example
console#configure
console(config)#interface gigabitethernet 1/0/1
console(config-if-Gi1/0/1)#storm-control broadcast action shutdown
console(config-if-Gi1/0/1)#storm-control broadcast level 10
console(config-if-Gi1/0/1)#end
console#
Sample Output
console#show storm-control gigabitethernet 1/0/1
Bcast Bcast Mcast Mcast Ucast Ucast Flow
Port Mode Level Mode Level Mode Level Ctrl
---------- -------- --------- -------- --------- -------- --------- ----------
Gi1/0/1 Enable 100 Disable 5 Disable 5 Enabled
Cause
This is How article, not Solution article, so there's no root cause.
Resolution
This is How article, not Solution article, so there's no resolution.