STIGQter STIGQter: STIG Summary: Cisco IOS Switch L2S Security Technical Implementation Guide Version: 3 Release: 2 Benchmark Date: 01 Jul 2026:

The Cisco switch must have Storm Control configured on all host-facing switchports.

DISA Rule

SV-220636r1205856_rule

Vulnerability Number

V-220636

Group Title

SRG-NET-000512-L2S-000001

Rule Version

CISC-L2-000160

Severity

CAT III

CCI(s)

Weight

10

Fix Recommendation

Configure storm control for each host-facing interface as shown in the example below:

SW1(config)#int range g0/2 - 8
SW1(config-if-range)#storm-control unicast bps 62000000
SW1(config-if-range)#storm-control broadcast level bps 20000000

Note: The acceptable range is 10000000-1000000000 (10Mb-1Gb) for a gigabit Ethernet interface, and 100000000-10000000000 (100Mb-10Gb) for a 10-gigabit interface. Storm control is not supported on most FastEthernet interfaces.

Check Contents

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 level bps 62000000
storm-control broadcast level bps 20000000

Note: Bandwidth percentage thresholds (via level parameter) can be used in lieu of PPS rate. The storm control values in the STIG's example configuration are for illustrative purposes and do not constitute a mandatory value for this setting. Network engineers are responsible for determining and applying appropriate storm control levels based on the specific operational and mission-based bandwidth requirements of each port. A setting must be determined and intentionally configured.

If storm control is not enabled at a minimum for broadcast traffic, this is a finding.

Vulnerability Number

V-220636

Documentable

False

Rule Version

CISC-L2-000160

Severity Override Guidance

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 level bps 62000000
storm-control broadcast level bps 20000000

Note: Bandwidth percentage thresholds (via level parameter) can be used in lieu of PPS rate. The storm control values in the STIG's example configuration are for illustrative purposes and do not constitute a mandatory value for this setting. Network engineers are responsible for determining and applying appropriate storm control levels based on the specific operational and mission-based bandwidth requirements of each port. A setting must be determined and intentionally configured.

If storm control is not enabled at a minimum for broadcast traffic, this is a finding.

Check Content Reference

M

Target Key

4070