The layer 2 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-263667	SRG-NET-000715	SRG-NET-000715-L2S-000120	SV-263667r982573_rule	2025-03-05	3

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.

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.

ℹ️ Check
Verify the layer 2 switch is configured to implement physically or logically separate subnetworks to isolate organization-defined critical system components and functions. If the layer 2 switch is not configured to implement physically or logically separate subnetworks to isolate organization-defined critical system components and functions, this is a finding.

✔️ Fix
Configure the layer 2 switch to implement physically or logically separate subnetworks to isolate organization-defined critical system components and functions.