STIGQter: STIG Summary: Cisco NX OS Switch L2S Security Technical Implementation Guide Version: 3 Release: 4 Benchmark Date: 01 Jul 2026:

The Cisco switch must have STP Loop Guard enabled.

DISA Rule

SV-220682r856491_rule

Vulnerability Number

V-220682

Group Title

SRG-NET-000362-L2S-000023

Rule Version

CISC-L2-000110

Severity

CAT II

CCI(s)

• CCI-002385 - Protect against or limit the effects of organization-defined types of denial of service events.

Weight

10

Fix Recommendation

Configure the switch to have STP Loop Guard enabled via the spanning-tree loopguard default global command.

Check Contents

Review the switch configuration to verify that STP Loop Guard is enabled as shown in the configuration example below:

hostname SW1
…
…
…
spanning-tree loopguard default

If STP Loop Guard is not enabled, this is a finding.

Vulnerability Number

V-220682

Documentable

False

Rule Version

CISC-L2-000110

Severity Override Guidance

Review the switch configuration to verify that STP Loop Guard is enabled as shown in the configuration example below:

hostname SW1
…
…
…
spanning-tree loopguard default

If STP Loop Guard is not enabled, this is a finding.

Check Content Reference

M

Target Key

4073