CDP AND TELNET LAN Connections © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-1 Cisco Discovery Protocol • CDP is a proprietary utility that gives you a summary of directly connected switches, routers, and other Cisco devices • CDP discovers neighboring devices regardless of which protocol suite they are running © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-2 Discovering Neighbors with CDP - CDP runs on routers with Cisco IOS® software Release 10.3 or later and on Cisco switches and hubs - Summary information includes:      Device identifiers Address list Port identifier Capabilities list Platform © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-3 Discovering Neighbors with CDP - CDP runs on routers with Cisco IOS® software Release 10.3 or later and on Cisco switches and hubs - Summary information includes:      Device identifiers Local interface Outgoing Port Capabilities list Platform © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-4 Using CDP © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-5 Using the show cdp neighbors Command © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-6 Using the show cdp entry Command © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-7 Additional CDP Commands © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-8 Creating a Network Map © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-9 Using Telnet to Connect to Remote Devices © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-10 Viewing Telnet Connections © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-11 Suspending and Resuming a Telnet Session © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-12 Closing a Telnet Session © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-13 Using the ping and trace Commands Router###ping Router###ping 10.1.1.10 10.1.1.10 Type Type escape escape sequence sequence to to abort abort Sending Sending 5, 5, 100-byte 100-byte ICMP ICMP Echos Echos to to 10.1.1.10, 10.1.1.10, timeout timeout is is 22 seconds: seconds: !!!!! !!!!! Success Success rate rate is is 100 100 percent percent (5/5), (5/5), round-trip round-trip min/avg/max min/avg/max == 4/4/4 4/4/4 ms ms Router#trace Router#trace 192.168.101.101 192.168.101.101 Type Type escape escape sequence sequence to to abort abort Tracing Tracing the the route route to to 192.168.101.101 192.168.101.101 11 p1r1 p1r1 (192.168.1.49) (192.168.1.49) 20 20 msec msec 16 16 msec msec 16 16 msec msec 22 p1r2 p1r2 (192.168.1.18) (192.168.1.18) 48 48 msec msec ** 44 44 msec msec Router# Router# © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-14 © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-15 ... 192.168.101.101 192.168.101.101 11 p1r1 p1r1 (1 92.168.1.4 9) (1 92.168.1.4 9) 20 20 msec msec 16 16 msec msec 16 16 msec msec 22 p1r2 p1r2 (1 92.168.1.1 8) (1 92.168.1.1 8) 48 48 msec msec ** 44 44 msec msec... is 22 seconds: seconds: !!!!! !!!!! Success Success rate rate is is 100 100 percent percent (5 / 5), (5 / 5), round-trip round-trip min/avg/max min/avg/max == 4/4/4 4/4/4 ms ms Router#trace Router#trace... Using CDP © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-5 Using the show cdp neighbors Command © 2007 Cisco Systems, Inc All rights reserved ICND1 v1.0—4-6 Using the show cdp entry