Hi,
ESXi has the ability to respond to CDP requests.
Check if CDP is enabled on a vSwitch
1 2 3 4 5 | PS D:\> $vSwitch=Get-VirtualSwitch -Name vSwitch0 -VMHost myESXiHost.myDomain.orgPS D:\> $vSwitch.ExtensionData.Spec.Bridge.LinkDiscoveryProtocolConfigProtocol Operation-------- ---------cdp listen |
Possible values: down (disable CDP), listen (only respond to client requests), advertise (send frequently advertisments), or both (listen and advertise)
Disable CDP
1 2 | PS D:\> $oESXCli=Get-EsxCli -VMHost myESXiHost.myDomain.org -V2PS D:\> $oESXCli.network.vswitch.standard.set.Invoke(@{"vswitchname"="vSwitch1";"cdpstatus"="down"}) |
To enable both, listing and advertising
1 | PS D:\> $oESXCli.network.vswitch.standard.set.Invoke(@{"vswitchname"="vSwitch1";"cdpstatus"="both"}) |
ENable both via esxcli.
1 2 | esxcfg-vswitch -b vSwitch1esxcli network vswitch standard set -v vSwitch1 -c both |
Get CDP information in a Windows VM
1 2 3 | PS D:\> Install-Module PSDiscoveryProtocolPS D:\> $Packet=Invoke-DiscoveryProtocolCapture -Type CDP -forcePS D:\> Get-DiscoveryProtocolData -Packet $packet | ft Computer,Connection,VLAN,Device,Port,Interface -AutoSize |
Michael