The Dell OS10 Switch must implement physically or logically separate subnetworks to isolate organization-defined critical system components and functions.

Severity	Group ID	Group Title	Version	Rule ID	Date	STIG Version
medium	V-269972	SRG-NET-000715-L2S-000120	OS10-L2S-000300	SV-269972r1052302_rule	2024-12-11	1

Description
Separating critical system components and functions from other noncritical system components and functions through separate subnetworks may be necessary to reduce susceptibility to a catastrophic or debilitating breach or compromise that results in system failure. For example, physically separating the command-and-control function from the in-flight entertainment function through separate subnetworks in a commercial aircraft provides an increased level of assurance in the trustworthiness of critical system functions. Satisfies: SRG-NET-000715-L2S-000120, SRG-NET-000512-L2S-000012

Description

Separating critical system components and functions from other noncritical system components and functions through separate subnetworks may be necessary to reduce susceptibility to a catastrophic or debilitating breach or compromise that results in system failure. For example, physically separating the command-and-control function from the in-flight entertainment function through separate subnetworks in a commercial aircraft provides an increased level of assurance in the trustworthiness of critical system functions. Satisfies: SRG-NET-000715-L2S-000120, SRG-NET-000512-L2S-000012

ℹ️ Check
Review the switch configurations and verify that no access switch ports have been assigned membership to the default VLAN (i.e., VLAN 1). VLAN assignments can be verified via the “show vlan” command: OS10# show vlan Codes: * - Default VLAN, M - Management VLAN, R - Remote Port Mirroring VLANs, @ - Attached to Virtual Network, P - Primary, C - Community, I - Isolated, S - VLAN-Stack VLAN Q: A - Access (Untagged), T - Tagged NUM Status Description Q Ports * 1 Inactive 30 Inactive Management VLAN 100 Inactive A Eth1/1/1 200 Inactive A Eth1/1/3-1/1/58 201 Inactive A Eth1/1/2 OS10# If there are access switch ports assigned to the default VLAN, this is a finding.

ℹ️ Check

Review the switch configurations and verify that no access switch ports have been assigned membership to the default VLAN (i.e., VLAN 1). VLAN assignments can be verified via the “show vlan” command: OS10# show vlan Codes: * - Default VLAN, M - Management VLAN, R - Remote Port Mirroring VLANs, @ - Attached to Virtual Network, P - Primary, C - Community, I - Isolated, S - VLAN-Stack VLAN Q: A - Access (Untagged), T - Tagged NUM Status Description Q Ports * 1 Inactive 30 Inactive Management VLAN 100 Inactive A Eth1/1/1 200 Inactive A Eth1/1/3-1/1/58 201 Inactive A Eth1/1/2 OS10# If there are access switch ports assigned to the default VLAN, this is a finding.

✔️ Fix
Remove the assignment of the default VLAN from all access switch ports: OS10(config)# interface range eth1/1/4-1/1/58 OS10(conf-range-eth1/1/4-1/1/58)# switchport mode access OS10(conf-range-eth1/1/4-1/1/58)# switchport access vlan 200