Basic Troubleshooting Router Commands

Show protocols	shows network protocols.
Show ip protocols	lists protocols on the port IPX, IP.
Copy running-config tftp	Copies Running config file to a TFTP Server
Copy tftp running-config	Copies running config file from a TFTP Server.
Copy tftp flash	Copies IOS from a TFTP Server
Ping ip address	Tests connectivity to a device
Traceroute ip address	Traces path to a device
Show cdp neighbors	Shows CISCO connected devices and ports
No command	Disables command

Password Recovery on CISCO Routers

Password Recovery on a CISCO 2500 Series Router

1. At startup ; hit CTRL & PAUSE/BREAK

2. type o/r 0x2142 enter and type I hit enter

3. reload, then go into privilege mode copy start run

4. change password, config-register 0x2102 & reload

Programming A Basic Router

1)

Login to privileged mode: type enable	HOSTNAME#
Enter global settings by typing: config t	HOSTNAME(CONFIG)#
Type Hostname hostname
Banner MOTD ! whatever message you want up to 80 characters !
enable password password
Username word privilege 15 password password
service password-encryption
access-list number {permit or deny} {test-conditions}
ip domain-lookup
IP domain name domain name
IP Name Server ip address
IP DHCP-Server ip address
ip http secure-server

2)

Enter Line settings by typing: Line

HOSTNAME(CONFIG- LINE)#

Console 0	VTY 0 15	AUX 0
Login local	Login local	Login local
Password password	Password password	Password password
logging synchronous	logging synchronous	logging synchronous

3)

Enter interface mode by typing: INTERFACE

HOSTNAME(CONFIG-IF)#

Serial S0 (DCE)	Serial S1 (DTE)	Ethernet 0 ; Fastethernet ; Gigabit	Ethernet E1
INT S 0	INT S 1	INT E 0	INT E 1
IP ADDRESS ip subnet	IP ADDRESS ip subnet	IP ADDRESS ip subnet	IP ADDRESS ip subnet
NO SHUTDOWN	NO SHUTDOWN	NO SHUTDOWN	NO SHUTDOWN
CLOCKRATE 56000	Description	Description	Description
Description What you want		Access group number in | out {protocol} access	Access group number in | out {protocol} access
Encapsulation	Encapsulation	IP, IPX, APPLETALK	IP, IPX, APPLETALK
Duplex auto ; full	Duplex auto ; full	Duplex auto ; full	Duplex auto ; full
Speed auto	Speed auto	Speed auto ; 100 ; 1000	Speed auto ; 100 ; 1000

Ethernet = 10Mb

FastEthernet = 100Mb

Gigabit = 1000Mb

4)

Enter router config mode by typing: router protocol

HOSTNAME(CONFIG-ROUTER)#

Type router rip	: type Network XXX.XXX.XXX.XXX
Type router igrp, eigrp, ospf autonomous number	: type Network XXX.XXX.XXX.XXX
IP Route	IP address destination subnet mask port to network

Router Simulator

Console Cable Connection

Console Port	Roll-Over Cable			Terminal Adapter			Console Device
DTE Signal	RJ45 plug	USOC Color	RJ45 plug	RJ45 jack	T568 Color	DB9F pin	DTE Signal
RTS	1	brown	8	8	slate	8	CTS
DTR	2	blue	7	7	brown	6	DSR
TxD	3	yellow	6	6	yellow	2	RxD
GND	4	green	5	5	green	5	Signal Ground
GND	5	red	4	4	red
RxD	6	black	3	3	black	3	TxD
DSR	7	orange	2	2	orange	4	DTR
CTS	8	slate	1	1	blue	7	RTS