Learning About other Devices
Module 4
Cisco Discovery Protocol
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_____________________________
Layer _____________________

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Though it shows L3 IP information
Works only on ________________
__________________________________
_________________________________
Enables network administrators to access
a summary of what other device’s
configurations look like

Allows admin to _______________________
CDP cont…

CDP ________________________
to directly connected neighboring
Cisco device

Advertisement contains, in part, ____
____________________________ the
following info:
• __________________
• __________________
• __________- _______________________
___________________________________
______________________________
• __________________ , etc.
CDP cont…

CDP _____________________ upon
boot up of Cisco device (IOS version 10.3 – 12)
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To disable CDP at the ___________,

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_____________________________
___________________________
Router(_________)# no CDP
_______ (in global configuration mode)
To disable CDP on a _____________

Router(_____________)# no CDP
______ (in interface configuration mode)
Common commands
Router# show cdp neighbors
 Router# show cdp neighbors
detail
 Router# cdp timer – specifies

often IOS sends CDP updates

Router# show cdp traffic
Know the difference in the show cdp
commands and the troubleshooting
commands
how
Basic Network Testing
Telnet, ping and trace
Most complete test
mechanism available.
Tests all 7 layers
Tests
connectivity up
to layer 3
Telnet
In addition to being a complete
testing method…
 _____________________________
_____________________________
 Used from either the ___________
____________________________
 How many simultaneous incoming
Telnet sessions can be opened?
 Can be used in ________________
_____________________________
_____________________________

Telnet Continued

Methods of telneting into Paris router


Denver>
Denver>
Denver>
Denver>
Inability to Telnet could be caused by one
of the following:



• VTY not set correctly on telneted device



Suspend feature- Press
Continue previous Telnet session –
Resume command- ________________
________________________________
Ping– A review
The ping command sends _______
_____________________________
_____________________________
_____________________________
_____________________________
 What indicates a successful echo?
 What does a period (.) indicate?

Traceroute- A review
Used for ______________________
_____________________________
____________________________
 If a routers is unreachable, _______
____________________________
instead of the name of the router
 Can be used for the ____________
_____________________________
_____________________________

Labs for Mod 4
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Reminder: Pre-reading and thoughtful
answering of lab questions is crucial to
understanding and memorizing IOS commands
Labs:
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Creating a Network Map Using CDP
Using CDP commands
Establishing and Verifying a Telnet Connection
Suspending and Disconnecting Telnet Sessions
Advanced Telnet Operations
Connectivity Tests- Ping
Connectivity Tests- Traceroute