All port groups on standard switches must not be configured to virtual local area network (VLAN) values reserved by upstream physical switches.
An XCCDF Rule
Description
<VulnDiscussion>Certain physical switches reserve certain VLAN IDs for internal purposes and often disallow traffic configured to these values. For example, Cisco Catalyst switches typically reserve VLANs 1001 to 1024 and 4094, while Nexus switches typically reserve 3968 to 4094. Check the documentation for the specific switch in use. Using a reserved VLAN might result in a denial of service on the network.</VulnDiscussion><FalsePositives></FalsePositives><FalseNegatives></FalseNegatives><Documentable>false</Documentable><Mitigations></Mitigations><SeverityOverrideGuidance></SeverityOverrideGuidance><PotentialImpacts></PotentialImpacts><ThirdPartyTools></ThirdPartyTools><MitigationControl></MitigationControl><Responsibility></Responsibility><IAControls></IAControls>
- ID
- SV-256426r892864_rule
- Severity
- Medium
- References
- Updated
Remediation - Manual Procedure
From the vSphere Client, go to Hosts and Clusters.
Select the ESXi Host >> Configure >> Networking >> Virtual switches.
For each port group on a standard switch that is configured to a reserved VLAN, click the "..." button next to the port group.