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CCNA 2 v3.1 Module 4 Learning About Other Devices

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Cisco Discovery Protocol (CDP)

CDP is media and protocol independent, and runs on all Cisco equipment over the Subnetwork Access Protocol (SNAP).

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Showing CDP Neighbor Entries

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Implementation, Monitoring, and Maintenance of CDP

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The show cdp interface Command

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The show cdp neighbors Command

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Creating a Network Map

• The show cdp neighbors [type number] [detail] command can be used to obtain the following:

Device ID — Address

Port ID — Capabilities

Version — Platform

IP network prefix

VTP management domain name (CDPv2 only)

Native VLAN (CDPv2 only)

Full/Half duplex (CDPv2)

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Disabling CDP

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Troubleshooting CDP

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The show cdp traffic Command

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Telnet

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Telnet Operations

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Establishing Telnet Connections

• To initiate a Telnet session any of the following alternatives can be used:

Denver>connect parisDenver>paris Denver>131.108.100.152Denver>telnet paris

• A hostname table or access to DNS for Telnet must be present for a name to work. Otherwise, the IP address of the remote router must be entered.

• Telnet can be used to determine if a remote router can be accessed.

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Telnet Operations

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Advanced Telnet Operation

Multiple Telnet sessions can be used and suspended with the Ctrl+Shift+6 then x sequence.

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Testing with the ping Command

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Testing with the traceroute Command

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Troubleshooting IP Addressing Issues

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Summary