Guiding Commands For CCNA Intro

Engy Medhat's configuration Guide

(Switching)

1) switching modes:

in order to access a switch and deal with it ,there exists 3 main steps (i.e 3 main modes):

a.user mode------>this mode is automatically configured once i connect the switch (for example catalyst 3550) by my laptop or pc with a console cable and setup some standard settings through (right click my computer>manage>device manger>ports>COM"n">OK).

Switch>

b.enable mode------>from the previous mode once i typed "enable or en", it will takes me from the user mode into enable one.

Switch#

c.configuration mode------>from the previous mode once i typed "config t",it will takes me into a terminal mode.

Switch(config)#

Note: to return from one certain mode into a previous one you have to type "exit", however if you want to end the session (i.e return to intial mode"user mode") you have to type "end".

Note: Don't forget the console Password ------> switch(config)# username S1 secret XXX

S1(config)#line console 0

S1(config-line)#password XXX

S1(config-line)#login

S1(config-line)#end

2)Telnet\SSH login:

Both of telnet and ssh login required creating an account (username\password), this account may be a local one (i.e each server is manually configured by it's usernames and thier passwords) OR may be a server one ( AD server automatically saves all the usernames and thier passwords)

Note: Telnet's Password ----->clear text

SSH's password------->encrypted text

Commands:

Switch(Config)# line vty 0 15

Switch(Config-line)# login local

Switch(Config-line)# transport input {none, telnet, ssh, all}

3)VLANS:

vlans stands for virtual lans (i.e software lans ) ,inorder to cast the lan into independent lans and each group of lans can have a group of switch interface under a certain name (example: IT vlan , HR vlan, Admin vlan.....etc)

Commands:

S1(config)#vlan 10

S1(config-vlan)#name HR

S1(config)#interface fa0/1 Note: for a range "interface range fa0/1-5",for seperate group "interface range fa0/1,2,6"

S1(config-if)#switchport mode access//ACCESS MODE//

S1(config-if)#switchport access vlan 10 //ACCESS MODE//

S1(config-if)#end

S1(config)#interface fa0/5

S1(config-if)#switchport mode trunk //TRUNK MODE//

S1(config-if)#end

Note: " access mode" means for the interfaces which are under the access modes they can access the switch through thier vlans.

Note: "trunk mode" means all the interfaces that are allowed can access all the vlans within the switch .

Note: we have to type "end" inorder to save the prevoius commands OR we can type " do wr" .

4) VTP:

vtp stands for virtual tunneling protocol, inorder to set a vtp so many parameters have to be considered like:

1. domain name

2. password

3. mode(server\client\transperent)

commands :

S1(config)#vtp domain (name)

S1(config)#vtp password(password)

S1(config)#vtp mode(server/client/transperent)

5)Interface vlans' ips:

S1(config)#interface vlan 10

S1(config)#ip address 192.168.10.0 255.255.255.0

S1(config)#no shutdown

For checking :

1.#show vlan

2.#show vtp status

3.#show running-config

4.#show startup-config

5.#show run interface fa0/1

6.#show interface fa0/1

7.#show run | include domain