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

The Cisco switch must have Root Guard enabled on all switch ports connecting to access layer switches and hosts.

DISA Rule

SV-220655r539671_rule

Vulnerability Number

V-220655

Group Title

SRG-NET-000362-L2S-000021

Rule Version

CISC-L2-000090

Severity

CAT III

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 Root Guard enabled on all ports connecting to access layer switches and hosts.

SW1(config)#int range g0/0 - 9
SW1(config-if-range)#spanning-tree guard root

Check Contents

Review the switch topology as well as the configuration to verify that Root Guard is enabled on all switch ports connecting to access layer switches and hosts.

interface GigabitEthernet0/0
spanning-tree guard root
!
interface GigabitEthernet0/1
spanning-tree guard root
…
…
…
interface GigabitEthernet0/9
spanning-tree guard root

If the switch has not enabled Root Guard on all switch ports connecting to access layer switches and hosts, this is a finding.

Vulnerability Number

V-220655

Documentable

False

Rule Version

CISC-L2-000090

Severity Override Guidance

Review the switch topology as well as the configuration to verify that Root Guard is enabled on all switch ports connecting to access layer switches and hosts.

interface GigabitEthernet0/0
spanning-tree guard root
!
interface GigabitEthernet0/1
spanning-tree guard root
…
…
…
interface GigabitEthernet0/9
spanning-tree guard root

If the switch has not enabled Root Guard on all switch ports connecting to access layer switches and hosts, this is a finding.

Check Content Reference

M

Target Key

4071

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