Port id for vSphere Distributed Switch is missing on physical switch# sh lldp neighbors

Products

• VMware vSphere ESXi
• VMware vCenter Server 7.0
• VMware vCenter Server 8.0

Issue/Introduction

With Link Layer Discovery Protocol (LLDP), vSphere administrators can determine which physical switch port connects to a given vSphere Distributed Switch.

From the Operation drop-down menu, select the operational mode of the ESXi hosts connected to the switch.

Both    ESXi detects and displays information about the associated physical switch and makes information about the vSphere Distributed Switch available to the switch administrator.

LLDP neighbors command on the physical switch does not show the virtual port id of the vSphere Distributed Switch and only shows the mac address.

switch#sh lldp neighbors

Port   Device ID     Port ID                System Name    
ge9    vmnic0       ##:##:##:##:##:##     esxi.localdomain

Environment

vSphere 7

vSphere 8

Cause

LLDP information for a vSphere Distributed Port is in expanded LLDP Neighbor information under "Port Description"

Resolution

View the expanded LLDP Neighbor information in the physical switch.

physical switch cli :

Find the physical port,

switch#sh lldp neighbors

Port   Device ID       Port ID              System Name    
ge9    vmnic0       ##:##:##:##:##:##     esxi.localdomain

Then get the expanded LLDP for that port,

switch#sh lldp neighbor ge9

Device ID: ##:##:##:##:##:##
Port ID: ##:##:##:##:##:##
System Name: esxi.localdomain
System description: VMware ESX Releasebuild-<build>
Port description: port ## on dvSwitch DSwitch (etherswitch)

or

physical switch UI:

From the switch UI navigate to the LLDP Neighbor Information and view the expanded port detail.

LLDP Neighbor Information
Port Details
Local Port:    GE9
Chassis ID:    vmnic0
Port ID Subtype:    MAC Address
Port ID:    ##:##:##:##:##:##
Port Description:    port ## on dvSwitch DSwitch (etherswitch)
System Name:    esxi.localdomain
System Description:    VMware ESX Releasebuild-<build>