1. It starts up automatically and allows the device to detect directly connected neighbor devices that use CDP.
2. It allows systems to learn about each other even if different network layer protocols are configured.
CDP
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SonicWALL CDP is a data backup and disaster recovery solution created by the company Dell. CDP stands for Continuous Data Protection. There is a model for businesses of all sizes.
This is a command line use in Cisco devices to show neighbors which is using Cisco Discovery Protocol (CDP).
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You don't want to allow adjacent devices to gain information about this router for security reasons.SolutionYou can disable CDP on a single interface by using the command no cdp enable interface configuration command: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#cdp runRouter1(config)#interface FastEthernet0/0 Router1(config-if)#no cdp enableRouter1(config-if)#end Router1#And you can disable all CDP on the router with the global configuration command, no cdp run: Router1#configure terminal Enter configuration commands, one per line. End with CNTL/Z. Router1(config)#no cdp runRouter1(config)#end Router1#
They are mostly made up of ASCII strings THey may include information about CDP interfaces and neighbor entries
packet switching
CDP
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• tests Layer 2 connectivity • enabled by default on each interface • provides information on directly connected devices that have CDP enabled