CCNA Course in
Urdu Lab 2 Part 2 Cisco Internetworking Operating System (IOS)
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LAB 02
MANAGING
A CISCO INTERNETWORK
BOOT SYSTEM COMMANDS
In case the
flash memory is corrupted, then these powerful commands give us the ability to
load IOS from different locations.
Router(config)#boot
system ?
WORD TFTP filename or URL
flash Boot from flash memory
ftp Boot from a server via ftp
mop Boot from a Decnet MOP server
rcp Boot from a server via rcp
rom Boot from rom
tftp Boot from a tftp server
Router(config)#boot
system flash c2800nm-advsecurityk9-mz.124-12.bin
The above
command configures the router to boot the IOS listed in it. This may be used to
test a new loaded IOS.
Router(config)#boot
system tftp c2800nm-advsecurityk9-mz.124-12.bin 10.12.2.5
Router(config)#boot
system rom
CHECKING THE BOOT OPTIONS OF IOS
Router(config)#boot
system rom
Router(config)#do
show run | include boot system
boot system flash
c2800nm-advsecurityk9-mz.124-12.bin
boot system
tftp c2800nm-advsecurityk9-mz.124-12.bin 10.12.2.5
boot system rom
Router(config)#
These configurations are called
the BACK UP ROUTINE for the IOS.
BACKING UP AND RESTORING THE CISCO IOS
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ESSENTIALS FOR BACKING UP OF THE IOS
- Making sure you can access the network server.
- Ensure that the network server has adequate space for
the code image.
- Verify the filename naming and path requirement.
- TFTP server software must be running on the
administrator’s workstation.
- The Ethernet connection between administrator and
router must be made with a cross over cable.
- The workstation and Ethernet interface must be on the
same subnet.
- The copy flash
tftp command must be supplied the IP address of the workstation if you
are copying from the flash
- And if you are copying into flash, you need to verify
that there is enough room in the flash memory to accommodate the file to
be copied.
à BACKING UP IOS IN FLASH MEMORY
- First verify the flash memory by using the command,
Router#show flash
- Now check the connectivity with tftp server by
pinging its I.P, e.g. Router#ping 10.12.2.5
- Now copy the contents of flash into tftp server
Router#copy tftp
flash
Source filename
[]?c2800nm-advsecurityk9-mz.124-12.bin
Address or name
of remote host []? 10.12.2.5
Destination
filename [c2800nm-advsecurityk9-mz.124-12.bin]?[enter]
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!
21710744 bytes
copied in 60.724 secs (357532 bytes/sec)
Router#
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Lecture in Urdu:
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RESTORING OR UPGRADING IOS
Router#copy tftp flash
Address or name
of remote host []? 10.12.2.5
Source filename
[]?c2800nm-advsecurityk9-mz.124-12.bin
Destination
filename [c2800nm-advsecurityk9-mz.124-12.bin]?[enter]
%Warning:There
is a file already existing with this name
Do you want to
over write? [confirm][enter]
BACKING UP AND RESTORING THE CISCO CONFIGURATIONS
BACKING UP THE CISCO ROUTER CONFIGURATION
à Verifying the current
configuration
Router#show running-config
à Verifying the stored
configuration
Router#show startup-config
à Copying current
configuration to NVRAM
Router#copy run start
à Copying the
configuration to a TFTP Server
Router#copy run tftp
Address or name of remote host
[]? 10.12.2.5
Destination filename
[router-config]?farhan-config
!!
875 bytes copied in 0.800 secs
(10.93 bytes/sec)
RESTORING THE CISCO CONFIGURATIONS
Router#copy tftp running-config
Address or name of remote host
[]? 10.12.2.5
Source filename []?farhan-config
Destination
filename[running-config]?[enter]
ERASING THE CISCO CONFIGURATIONS
Router#erase startup-config
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Lecture in Urdu:
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