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Cisco 3900 Series, Cisco 2900 Series, and Cisco 1900 Series Integrated Services Routers Generation 2 Software Configuration Guide
Chapter Upgrading the Cisco IOS Software
How to Upgrade the Cisco IOS Image
SUMMARY STEPS
1.
enable
2.
dir flash0:
3.
From the displayed output of the
dir flash0:
command, compare the number of bytes
available
to
the minimum flash requirements for the new system image.
a.
If the available memory is equal to or greater than the new system image’s minimum flash
requirements, proceed to the
“Copying the System Image into Flash Memory” section on
.
b.
If the available memory is less than the new system image’s minimum flash requirements,
proceed to
.
4.
From the displayed output of the
dir flash0:
command, compare the number of bytes
total
to the
size of the system image to which you want to upgrade.
a.
If the total memory is less than the new system image’s minimum flash requirements, you must
upgrade your compact flash memory card. See the hardware installation guide for your router.
b.
If the total memory is equal to or greater than the new system image’s minimum flash
requirements, proceed to
5.
dir
/all flash0:
6.
From the displayed output of the
dir /all flash0:
command, write down the names and directory
locations of the files that you can delete.
7.
(Optional)
copy
flash0:
{
tftp
|
rcp
}
8.
for each file that you identified in
9.
delete flash0:
directory-path
/
filename
10.
Repeat
for each file that you identified in
.
11.
dir flash0:
[
partition-number
:
]
12.
From the displayed output of the
dir flash0:
command, compare the number of bytes
available
to
the size of the system image to which you want to upgrade.
a.
If the available memory is less than the new system image’s minimum flash requirements, then
you must upgrade your compact flash memory card to a size that can accommodate both the
existing files and the new system image. See the hardware installation guide
for your router.
b.
If the available memory is equal to or greater than the new system image’s minimum flash
requirements, proceed to the
“Copying the System Image into Flash Memory” section on
.
