The Cisco switch must have Storm Control configured on all host-facing switchports.
Severity | Group ID | Group Title | Version | Rule ID | Date | STIG Version |
|---|---|---|---|---|---|---|
| low | V-220687 | SRG-NET-000512-L2S-000001 | CISC-L2-000160 | SV-220687r539671_rule | 2024-08-22 | 3 |
Description
A traffic storm occurs when packets flood a LAN, creating excessive traffic and degrading network performance. Traffic storm control prevents network disruption by suppressing ingress traffic when the number of packets reaches a configured threshold levels. Traffic storm control monitors ingress traffic levels on a port and drops traffic when the number of packets reaches the configured threshold level during any one-second interval.
ℹ️ Check
Review the switch configuration to verify that storm control is enabled on all host-facing interfaces as shown in the example below:
interface GigabitEthernet0/3
switchport access vlan 12
storm-control unicast unicast level 50.00
storm-control broadcast broadcast level 40
If storm control is not enabled at a minimum for broadcast traffic, this is a finding.
✔️ Fix
Configure storm control for each host-facing interface as shown in the example below:
SW1(config)#int range e0/2 – 8
SW1(config-if-range)# storm-control unicast level 50
SW1(config-if-range)# storm-control broadcast level 40