7/30/2019 12. CDP Telnet

1/14

ICND1 v1.04-1

LAN Connections

CDP AND TELNET

7/30/2019 12. CDP Telnet

2/14

ICND1 v1.04-2

Cisco Discovery Protocol

CDP is a proprietary utility that gives you a suhmmary

of directly connected switches, routers, and other

Cisco devices.

CDP discovers neighboring devices regardless of

which protocol suite they are running.

7/30/2019 12. CDP Telnet

3/14

ICND1 v1.04-3

Discovering Neighbors with CDP

- CDP runs on routers with Cisco IOS software

Release 10.3 or later and on Cisco switches and

hubs.

- Summary informationincludes:

Device identifiers

Address list

Port identifierCapabilities list

Platform

7/30/2019 12. CDP Telnet

4/14

ICND1 v1.04-4

Using CDP

7/30/2019 12. CDP Telnet

5/14

ICND1 v1.04-5

Using the show cdp

neighbors Command

7/30/2019 12. CDP Telnet

6/14ICND1 v1.04-6

Using the show cdp entry Command

7/30/2019 12. CDP Telnet

7/14ICND1 v1.04-7

Additional CDP Commands

7/30/2019 12. CDP Telnet

8/14ICND1 v1.04-8

Creating a Network Map

7/30/2019 12. CDP Telnet

9/14ICND1 v1.04-9

Using Telnet to Connect to Remote Devices

7/30/2019 12. CDP Telnet

10/14ICND1 v1.04-10

Viewing Telnet Connections

7/30/2019 12. CDP Telnet

11/14ICND1 v1.04-11

Suspending and Resuming

a Telnet Session

7/30/2019 12. CDP Telnet

12/14ICND1 v1.04-12

Closing a Telnet Session

7/30/2019 12. CDP Telnet

13/14ICND1 v1.04-13

Using the ping and trace Commands

Router###ping 10.1.1.10

Type escape sequence to abort.

Sending 5, 100-byte ICMP Echos to 10.1.1.10, timeout is 2 seconds:

!!!!!

Success rate is 100 percent (5/5), round-trip min/avg/max = 4/4/4 ms

Router#trace 192.168.101.101

Type escape sequence to abort.

Tracing the route to 192.168.101.101

1 p1r1 (192.168.1.49) 20 msec 16 msec 16 msec

2 p1r2 (192.168.1.18) 48 msec * 44 msec

Router#

7/30/2019 12. CDP Telnet

14/14ICND1 v1.04-14