Documentation - V-256426

Title

All port groups on standard switches must not be configured to virtual local area network (VLAN) values reserved by upstream physical switches.

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><Docume...

Fix Text (Documentation Requirement)

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. Click "Edit Settings". On the "Properties" tab, change the "VLAN ID" to an appropriate VLAN ID and click "OK". or From a PowerCLI command prompt while connected to the ESXi host, run the following command: Get-VirtualPortGroup -Name "portgroup name" | Set-VirtualPortGroup -VLanId "New VLAN#"