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first steps with a router! , elementary configurations on arouter
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LOGO
CCNATehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch ; +989356589590Senior @ Tehran Institute of TechnologyCopyright 2014
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Tehran Institute of Technology
Contents
1. Managing name & Desc.
2. Managing Passwords
3. Console,Interface,Serial Advanced conf.
4. Fundamentals of Routing
Managing name & Descriptions
Note: Privileged Exec mode Required.
Change hostname– R1>enable– R1#configure terminal– Enter configuration commands, one per line. End with CNTL/Z.– R1(config)#hostname Router1– Router1(config)#
Message of the Day– Router>enable– Router#configure terminal– Enter configuration commands, one per line. End with CNTL/Z.– Router(config)#banner motd # Welcome to My Router1 ##– Router(config)#exit– Router#copy running-config startup-config– Destination filename [startup-config]? – Building configuration...– [OK]
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Passwords and Authentication
Passwords
B
E
C
D
AEnable
Password
Secret
Password
AUX Password
Console
PasswordsTelnet
Password
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Tehran Institute of Technology
Password Configurations
Enable Password
– This password needed when you want to switch between user mode and privileged mode
– Router>enable– Router#configure terminal– Enter configuration commands, one per line. End with CNTL/Z.– Router(config)#enable password $a12345
Note that this password saved in clear text mode, so you can have a look on this password using “show run” command.“Show run” is synonyms for “Show Running-Config” Command in Privileged Mode.
-- Router#show run OR
-- Router# Show Running-Config
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Password Configurations
Secret Password
– That’s similar to Enable Password , the difference between these codes are encryption of Secret Password.
– Router>enable– Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.– Router(config)#enable Secret $a12345
– Note that when “secret password” enabled the “enable password” will be disabled.So when you want to switch between privileged mode and user mode you must enter
Secret password for authentication.
You can have a look on secret password using “show config” mode , as you can see the password are encrypted!
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Password Configurations
Telnet Password
– Global Mode Required
– Telnet Configuration Required
– Router>enable– Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.– Router(config)#line vty 0 4– Router(config-line)#login (means: Password required when telnet acknowledged)– Router(config-line)#no login (means: Password not needed when telnet acknowledged)– Router(config-line)#password $a12345
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Password Configurations
AUX Password
– Global Mode required
– AUX Line configuration required
– Router Device must have AUX port physically
– Router>enable– Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.– Router(config)#line aux 0– Router(config-line)#login (means: Password required when AUX acknowledged)– Router(config-line)#no login (means: Password not needed when AUX acknowledged)– Router(config-line)#password $a12345
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Password Configurations
Console Password
– Router>enable– Router#configure terminal
Enter configuration commands, one per line. End with CNTL/Z.– Router(config)#line console 0– Router(config-line)#login
% Login disabled on line 0, until 'password' is set– Router(config-line)#password $a12345– Router(config-line)#
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Console Extra Configurations
If we don’t define console connection Timeout, the connection will be lost after10 minutes intentionally , so we can reconfigure it.
– Router>enable– Router#configure terminal– Router(config)#line console 0– Router(config-line)#exec-timeout 0 0 (means: timeout period is unlimited)– Router(config-line)#exec-timeout 25 (means: timeout period is 25 minutes)
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Interface mode Extra Configurations
To begin, here's what Interface Configuration Mode looks like in the Cisco IOS:
Router#Configure Terminal
Router(Config)#interface fastethernet0/0
Router(config-if)#
Alternatively, you can configure a group of
interfaces at the same time by using
the interface range command:
Router(config)#interface range fastethernet0/0 - 1
Router(config-if-range)#
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Interface mode Extra Configurations
Shutdown By default, a Cisco router or switch shuts down all ports, meaning the
ports aren't operational. However, this is different from a device such as a Linksys router; by default, all ports of one of these devices are operational when you turn on the device.
To enable ports for use, you can use the no shutdown command.
» Router(config-if-range)#no shutdown
%LINK-5-CHANGED: Interface FastEthernet0/0, changed state to up
%LINEPROTO-5-UPDOWN: Line protocol on Interface
FastEthernet0/0, changed state to up
%LINK-5-CHANGED: Interface FastEthernet0/1, changed state to up
» Router(config-if-range)#
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Interface mode Extra Configurations
IP Address To put an IP address on a port, use the ip address command. When using
this command, you must provide the IP address and subnet mask.
Router(config)#interface fastethernet0/0
Router(config-if)#ip address 10.10.10.1 255.0.0.0
Alternatively, you can make the port broadcast and request a DHCP
IP address by using the following command:
Router(config-if)#ip address dhcp
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Interface mode Extra Configurations
Interface Description
Router>enable Router#show running-config (look at interface full name) Router#configure terminal Router(config)#interface fastethernet0/0 Router(config-if)#description Language Dep, LAN
By adding details using the description command, anyone working on the router will know, which saves time and could even prevent outages.
Router(config-if)#description Gateway to Internet circuit configured by MFT call +98 -421 - 222 - 4747 for Support
Test above command Result using “ Router# show Running-config “
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Interface mode Extra Configurations
duplex and speed
setting an Ethernet port to 100Mb Full duplex
Router(config-if)#speed 100
Router(config-if)#duplex full
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
LOGO
Connecting two Routers @ Point-to-Point
Clock Rate and Bandwidth Scenario
Course name: Cisco CCNA
Instructor: Mansour.nch
Senior @ Tehran Institute of Technology
Copyright 2014
Connection Methods
Back to Back
in this scenario routers are
in the same location,
maximum distance = 3 – 4
meters.
Connection
Methods
Different
Geography
in this scenario routers
located @ far away from
each other , this distance is
a Geography Distance
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
Back to Back Method
Configurations:
one Router act as DTE and another one act as a DCE.
first of all use Router#show Running-Config to see what the serial
port full name? if serial port doesn’t exist you must add it physically.
if exist follow these steps:
Router(config)#interface serial0/0/0
Router(config-if)#clock rate 64000
Router(config-if)#BandWidth 64 (Mbps ; too important in routing protocols)
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
In a different Geography
This is Done by CSU/DSU Modem , when we are using communication infrastructure in a country this device configure parameters automatically for the best connectivity, so CSU/DSU modem is the best solution for this scenario.
Tehran Institute of Technology
Course name: Cisco CCNA Instructor: Mansour.nch Senior @ Tehran Institute of TechnologyCopyright 2014
LOGO
Tehran Institute of Technology
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