HP ProCurve 6120G/XG Configuration Manual page 436

Configuring for Network Management Applications
LLDP (Link-Layer Discovery Protocol)
For example, to disable CDP read-only on the switch:
ProCurve(config)# no cdp run
When CDP is disabled:
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Enabling or Disabling CDP Operation on Individual Ports. In the
factory-default configuration, the switch has all ports enabled to receive CDP
packets. Disabling CDP on a port causes it to drop inbound CDP packets
without recording their data in the CDP Neighbors table.
Syntax:
For example, to disable CDP on port A1:
ProCurve(config)# no cdp enable a1
13-88
displays an empty CDP Neighbors table
show cdp neighbors
displays
show cdp
Global CDP information
Enable CDP [Yes]: No
[no] cdp enable < [e] port-list >