Login Procedures
Login Procedures
Network Lab
Note: For log in problems or other network
problems, please notify Bob Sigllito promptly by
either e-mail robert.sigillito@jhu.edu or call him
at (301) 294-7072
Login Procedures
1). There are altogether 7 Cisco routers and 3 Catalyst
switches in the network lab.
To login to the system consoles of the routers/Cisco
switches, you must have either Internet access, or dial-
in facility.
- To login-in to the system console of the Cisco
routers/switches, you must use the terminal
server at JHU MCC.
- For detailed discussion of the terminal server,
please see the section on terminal server in the
class Web page.
2). After connecting with the console port of the
router/switch, hit carriage return and waiting for the
router to prompt you for the password.
- The password is: ******* to be supplied in the
first class
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Login Procedures
3). When ‘>’ prompt appears, enter the command
‘enable’
- then supply the password: ******* ;
- Password will be supplied in class at the beginning
of class
- When the password is entered, the router will
enter the ‘privileged’ mode.
Configure
Privileged
Mode
User Mode
enable
Mode
Config t
Router(config)#
Router>
Router#
end
disable
end
interface
Router(config-if)
router
Router(config-router)
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4).Router will issue the following prompt:
router-name#
Router name is any one of the following:
Rockville, Washington , Baltimore, San-Jose ,
Los_Angeles, New-York or San_Francisco
- When ‘router-name#’ sign appears, you are in
the privileged mode.
Once in the privileged mode, you can enter many
of the router commands. To find out the list of
commands you can enter, enter
Router-name# ?
- Router in response to the command ‘?’, will display
a list of all the commands that you can use.
The following are a few examples:
- configuration commands
● config t
- display commands:
• sh ip route - to display the routing table
• clear ip route * - to clear the routing table
• sh ip arp - to display the contents of ARP
Cache
• sh ip traffic
• sh host
- Other commands that can be entered are:
• debug arp - turn on arp debug mode
• debug ip rip - turn on rip debug mode
• no debug all - to turn off all debug modes
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Note:
For Cisco router configuration and command
references, please also referred to the following
references:
http://www.cisco.com/univercd/cc/td/doc/product/software/ios112
http://www.cisco.com/univercd/cc/td/doc/product/software/ios112/112cg_cr
/1cbook/index.htm
♦ Privileged Mode - Only in Privileged User Exec
Mode, you can enter router configuration
commands
• The router prompt for the ‘Privileged Mode’ is
‘#’
♦ Example:
• Rockville # config t /*Rockville is the router
name*/
/*config t is the command which the
user entered; config t means the
configuration command is to be
entered from the terminal */
• The configuration commands that can be
entered includes:
hostname e.g. hostname Rockville
interface e0
interface s0
To define default-route, proceed as:
ip route 0.0.0.0 0.0.0.0 x.y.z.w
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● interface commands
Example of interface commands:
‐ interface ethernet0
‐ ip addr 192.168.0.251 255.255.255.0
‐ interface serial0
ip addr 192.168.1.1 255.255.255.0
encapsulation ppp
bandwidth 64
no peer neighbor-route
no fair-queue
clockrate 64000
dce-terminal-timing-enable
no cdp enable
• To end the configuration mode, enter ‘ctrl-z’ or end
and
return to the privileged mode
• After finishing the ‘configuration mode’, the user
must make a permanent copy of the configuration
file by entering ‘wr memory’
or ‘copy running-config startup-config’
- This command will write a copy of running-
config into NVRAM.
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♦ The Cisco routers have four types of storage areas:
• RAM or memory (i.e., Dynamic Random Access
Memory) – contains the current
running-config
- Anything stored in RAM will be lost when
power is lost; to prevent the lost of your
configuration always save the contents of
RAM into NVRAM by issuing ‘wr mem’
Or ‘copy running-config startup-config’
• Flash Memory - contains Cisco IOS images
• ROM (Read Only Memory)
• NVRAM (Non-volatile Random Access Memory)
–
- As soon as it is configured, the configuration is
stored in running-config which is stored in
RAM. If power is lost, everything stored in
the memory (RAM) will be lost
- If power is lost and restored, router will use
the information which is contained in the
startup-config to configure the router
- In CS771 and IST711, you will only interface
with RAM memory and NVRAM.
• ‘wr memory’ will save a copy of the running-
config in NVRAM
- wr memory = copy running-config startup-
config
• Remember that as soon as you enter a command
in the configuration mode, it becomes effective
right away
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• Example:
Baltimore (config) #config t
Baltimore (config) #interface serial0
Baltimore (config) #shutdown /*the interface
will be shutdown right away */
/*(config) is to tell the user that it is in the
configuration mode */
Baltimore (config) #no shutdown
/*this command will activate the interface */
Baltimore(config) #ctrl-z /*return to privileged
mode */
♦ Other Router Commands in the privileged User
Mode
• Show Config /*to show the current
configuration*/
• Sh ip route /* to display the ip routing table*/
• Sh arp /*to show ARP table */
• Sh int ethernet0 /* to show the interface status of
Ethernet 0*/
• Sh int serialx, where x=0 or 1
• Sh ip traffics
• Ping x.y.z.w
• Trace x.y.z.w /* to trace the route to the
destination
x.y.z.w */
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Login Procedures
Network Lab.
The following explains how to do the network
lab project.
♦ Step 1. First login to the terminal server
keymaker.mcc.jhu.edu
- see the section on Terminal Server
• Configure the router by assigning proper IP
address to all the interfaces
• Enable router rip version 2 and specify on which
network interfaces the router should broadcast or
multicast RIP messages.
• Save the configuration to NVRAM
♦ Step 2. Repeat step1 for all the other six routers i.e.,
Washington, Baltimore and San-Jose, Los_Angeles,
San_Francisco and New-York
♦ Step 3. At this point the IP addresses of all the seven
routers should be properly assigned. Start with
Rockville, issue the following
1). First issue the command : Clear ip route *
- The purpose of this command is to clear the
contents of the routing table
2).Then issue the command : Sh ip route
- This command will display the contents of the
routing table
- proceed to produce hardcopy report of the
routing table
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3).Sh config
- Produce hardcopy report of your Cisco router
configuration
• Repeat the same things for other six routers
Cisco Router Review Questions
1).Explain the difference between the following:
Memory
NVRAM
2). Explain the difference between running-config and
startup-config.
What is the purpose of the following commands:
wr memory
or copy running-config startup-config
3).What is the purpose of the statements:
router rip
network 198.76.1.0
network 198.76.2.0
network 198.76.3.0
network 198.76.4.0
network 198.76.5.0
no network 198.76.11.0
4).Explain how you can first INACTIVATE an
interface and later on ACTIVATE the interface again.
5).Explain how you can turn on or off the debug mode
for ARP or ‘IP RIP’.
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Document Outline
