Of course, being able to discover a lot of information about neighboring devices is a network security exposure.
SHOW MAC ADDRESS OF CISCO ROUTER INTERFACES FULL
To get additional details, such as the full name of the model of switch and the IP address configured on the neighboring device, add the detail parameter as follows: show cdp neighbors detail This interface command also lists the platform, identifying the specific model of the neighboring router or switch. Each line provides the most important topology information about the neighbor: its hostname (device ID), the local device’s interface, and its interface (under the Port heading). This command lists each neighboring device, one per line. To see this information, use the show cdp command: show cdp neighbors Platform: The IOS version running on the device.Capabilities list: Device type (for example, router or switch).Port identifier: The interface on the remote device that sent the CDP advertisement.Address list: Network and data link addresses.CDP discovers several useful details from neighboring Cisco devices: Therefore, Cisco hardware that supports CDP can learn about other devices by listening for these messages. This is possible because Cisco routers and switches routinely send out CDP messages that announce information about themselves. The Cisco Discovery Protocol (CDP) discovers basic information about neighbor routers and switches without needing to know the passwords for those Cisco network devices. Let’s review them and see which issues they can help you investigate.
There are various tools that can help with network troubleshooting.
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