storm-control

Enables storm control on the firewall policy

Storms are packet bombardments that exceed the high threshold value configured for an interface. During a storm, packets are throttled until the rate falls below the configured rate, severely impacting performance for the RF Domain manager interface.

Storm control limits multicast, unicast and broadcast frames accepted and forwarded by a device. Messages are logged based on their severity level.

Supported on the following devices:

Syntax

storm-control [arp|broadcast|multicast|unicast]
storm-control [arp|broadcast|multicast|unicast] [level|log]
storm-control [arp|broadcast|multicast|unicast] level <1-1000000> 
[fe <1-4>|ge <1-8>|port-channel <1-8>|up1|wlan <WLAN-NAME>]
storm-control [arp|broadcast|multicast|unicast] log [<0-7>|alerts|critical|
debugging|emergencies|errors|informational|none|notifications|warnings]

Parameters

storm-control [arp|broadcast|multicast|unicast] level <1-1000000> 
[fe <1-4>|ge <1-8>|port-channel <1-8>|up1|wlan <WLAN-NAME>]

arp

Configures storm control for ARP packets

broadcast

Configures storm control for broadcast packets

multicast

Configures storm control for multicast packets

unicast

Configures storm control for unicast packets

level <1-1000000>

Configures the allowed number of packets received per second before storm control begins

  • <1-1000000> – Sets the number of packets received per second

fe <1-4>

Sets the FastEthernet port for storm control from 1 - 4

ge <1-8>

Sets the GigabitEthernet port for storm control from 1 - 8

port-channel <1-8>

Sets the port channel for storm control from 1- 8

up1

Sets the uplink interface

wlan <WLAN-NAME>

Configures the WLAN

  • <WLAN-NAME> – Sets the WLAN ID for the storm control configuration

storm-control [arp|bcast|multicast|unicast] log [<0-7>|alerts|critical|debugging|
emergencies|errors|informational|none|notifications|warnings]

arp

Configures storm control for ARP packets

broadcast

Configures storm control for broadcast packets

multicast

Configures storm control for multicast packets

unicast

Configures storm control for unicast packets

log

Configures the storm control log level for storm control events

<0-7>

Sets the numeric logging level from 0 - 7

alerts

Numerical severity 1. Indicates a condition where immediate action is required

critical

Numerical severity 2. Indicates a critical condition

debugging

Numerical severity 7. Debugging messages

emergencies

Numerical severity 0. System is unusable

errors

Numerical severity 3. Indicates an error condition

informational

Numerical severity 6. Indicates a informational condition

none

Disables storm control logging

notification

Numerical severity 5. Indicates a normal but significant condition

warnings

Numerical severity 4. Indicates a warning condition

Examples

nx9500-6C8809(config-fw-policy-testFW)#storm-control arp log warnings
nx9500-6C8809(config-fw-policy-testFW)#storm-control broadcast level 2
nx9500-6C8809(config-fw-policy-testFW)#show context
firewall-policy testFW
 ip dos fraggle drop-only
 ip dos tcp-sequence-past-window drop-only
 ip dos tcp-max-incomplete high 600
 ip dos tcp-max-incomplete low 60
 storm-control broadcast level 20000 ge 4
 storm-control arp log warnings
 ip-mac conflict drop-only
 ip-mac routing conflict log-and-drop log-level notifications
 flow timeout icmp 16000
 flow timeout udp 10000
 flow timeout tcp established 1500
 flow timeout other 16000
 dhcp-offer-convert
 ipv6 routing-type two log-and-drop log-level warnings
 ipv6 dos hop-limit-zero drop-only
 alg facetime
 logging icmp-packet-drop rate-limited
 logging malformed-packet-drop all
 logging verbose
 dns-snoop entry-timeout 1200
 ipv6-mac routing conflict drop-only
nx9500-6C8809(config-fw-policy-testFW)#

Related Commands

no

Disables storm control limits on multicast, unicast, and broadcast frames accepted and forwarded by a device