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Figure 6-7 shown a CDP Collecting Information Process
You use the show cdp neighbors command to display information about the networks
directly connected to the router. CDP provides information about each CDP neighbor device by
transmitting Type Length Values (TLVs). TLVs are blocks of information embedded in CDP
advertisements. Device TLVs displayed by the show cdp neighbors command, and as shown in
the following example, include the following:
• Device ID
• Local Interface
• Hold time
• Capability
• Platform
• Port ID
• VTP Management Domain Name (CDPv2 only)
• Native VLAN (CDPv2 only)
• Full/Half-Duplex (CDPv2 only)
6.5 Routed Protocols Versus Routing Protocols
Because of the similarity of the two terms, confusion often exists regarding the routed
protocol and the routing protocol, see Figure 6-8 shown a Routed and Routing Protocols.
The following provides some clarification:
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