STIGQter: STIG Summary: Cisco IOS Switch L2S Security Technical Implementation Guide Version: 2 Release: 1 Benchmark Date: 23 Apr 2021:

The Cisco switch must have Spanning Tree Protocol (STP) Loop Guard enabled.

DISA Rule

SV-220631r539671_rule

Vulnerability Number

V-220631

Group Title

SRG-NET-000362-L2S-000023

Rule Version

CISC-L2-000110

Severity

CAT II

CCI(s)

• CCI-002385 - The information system protects against or limits the effects of organization-defined types of denial of service attacks by employing organization-defined security safeguards.

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 SW2
…
…
…
spanning-tree mode pvst
spanning-tree loopguard default

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

Vulnerability Number

V-220631

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 SW2
…
…
…
spanning-tree mode pvst
spanning-tree loopguard default

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

Check Content Reference

M

Target Key

4070

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