Cisco Discovery Protocol

Cisco Discovery Protocol (CDP) allows ESX administrators to determine which Cisco switch port is connected to a given vSwitch. When CDP is enabled for a particular vSwitch, you can view properties of the Cisco switch (such as device ID, software version, and timeout) from the vSphere Client.

Enable CDP on an ESX Host

vSwitches are set to detect Cisco port information by default. You can also set the CDP mode so that a vSwitch makes information available to the Cisco switch administrator.

Procedure

View the current CDP mode for the a vSwitch by entering the esxcfg-vswitch -b <vSwitch> command.

If CDP is disabled, the mode will be shown as down.

Change the CDP mode by entering the esxcfg-vswitch -B <mode> <vSwitch> command.

Mode	Description
`down`	CDP is disabled.
`listen`	ESX detects and displays information about the associated Cisco switch port, but information about the vSwitch is not available to the Cisco switch administrator.
`advertise`	ESX makes information about the vSwitch available to the Cisco switch administrator, but does not detect and display information about the Cisco switch.
`both`	ESX detects and displays information about the associated Cisco switch and makes information about the vSwitch available to the Cisco switch administrator.

View Cisco Switch Information on the vSphere Client

When CDP is set to listen or both, you can view Cisco switch information.

Procedure

1	Log in to the vSphere Client and select the host from the inventory panel.
2	Click the Configuration tab and click Networking.
3	Click the info icon to the right of the vSwitch.

Cisco Discovery Protocol

Cisco Discovery Protocol

When CDP is set to listen or both, you can view Cisco switch information.

1

Log in to the vSphere Client and select the host from the inventory panel.

2

Click the Configuration tab and click Networking.

3

Click the info icon to the right of the vSwitch.

Author: admin

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