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To disable CDP at the global level, use the
no CDP run
command in global configuration mode.
 If CDP is
disabled globally, individual interfaces cannot be enabled for CDP.
On Cisco IOS Release 10.3 or higher,
CDP is enabled by default on all supported interfaces to send and
receive CDP information. However, on some interfaces, such as
asynchronous
interfaces, CDP is disabled by default. If CDP is disabled use the
CDP
enable command in interface configuration mode. To disable CDP
on a specific interface after it has been enabled, use the
no CDP enable
command in interface configuration mode.
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