Editing Switch Control (section)

== Upgrading Software for the 2950/2955 with the CMS image (.tar file) ==
In this example, the software on a 2950 is upgraded from version 12.1(12c)EA1 to version 121-13.EA1 with the CMS image (.tar file). The procedure is the same for a 2955.
Issue the show version command to view the current version of software that you run. Here is a sample command output:
<pre>2950#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(12c)EA1,
RELEASE SOFTWARE (fc1)

!--- The current software version is 12.1(12c)EA1.</pre>

Go to the LAN Switching Software section of the [http://tools.cisco.com/support/downloads/go/Redirect.x?mdfid=268438038 Downloads] ( registered customers only) page.
Select Catalyst 2950 software and locate the image you want to download. Note the size of the image in bytes. This example uses the c2950-i6q4l2-mz.121-13.EA1.tar file. The image size is 4877312 bytes, or approximately 5 MB. Download the image you want.

Issue the dir flash: command on the 2950/2955 to verify how much free memory you have for the upgrade. Here is a sample command output:
<pre>2950#dir flash:
Directory of flash:/
  2  -rwx   2774747  Mar 01 1993 17:52:14  c2950-i6q4l2-mz.121-12c.EA1.bin
 21  -rwx   2665985  Mar 01 1993 18:02:04  c2950-i6q4l2-mz.121-11.EA1a.bin
   
!--- Two images are installed.
	
 4  -rwx       916   Mar 01 1993 03:31:05  vlan.dat
 22  -rwx      312   Mar 01 1993 18:03:19  env_vars
 7  drwx       832   Mar 01 1993 17:53:20  html
	    
!--- output suppressed ---
	
	 
!--- Notice the d in the permissions, which indicates that html is a
!--- directory that contains the CMS files extracted from the .tar image 
!--- during the upgrade.

7741440 bytes total (578048 bytes free)

!--- There is less than 1 MB of free memory in Flash, which is not enough
!--- for the upgrade. Delete one of the old IOS images (.bin files).
	
2950#</pre>

Issue the delete command to remove one of the old IOS images in order to make room for the upgrade. Here is a sample command output:
<pre>2950#delete flash:c2950-i6q4l2-mz.121-11.EA1a.bin
Delete filename [c2950-i6q4l2-mz.121-11.EA1a.bin]?
Delete flash:c2950-i6q4l2-mz.121-11.EA1a.bin? [confirm]
2950#
2950#dir flash:
Directory of flash:/
  2  -rwx   2774747  Mar 01 1993 17:52:14  c2950-i6q4l2-mz.121-12c.EA1.bin
    
!--- You can leave one old image as a backup if you prefer.

  4  -rwx       916  Mar 01 1993 03:31:05  vlan.dat
 22  -rwx       312  Mar 01 1993 18:03:19  env_vars
  7  drwx       832  Mar 01 1993 17:53:20  html
    
!--- output suppressed ---

7741440 bytes total (3244544 bytes free)
  
!--- Even though you freed up additional memory there is still not
!--- enough free memory for the upgrade. Delete the files in the
!--- html directory.

2950#</pre>


The html directory is where the CMS files are extracted from the .tar image and installed during the upgrade. Issue the dir html command to view these files. Here is a sample command output:
<pre>2950#dir html
Directory of flash:/html/
    3  -rwx        4010   Mar 01 1993 17:52:14  homepage.htm
    5  -rwx        1392   Mar 01 1993 17:52:14  not_supported.html
    8  -rwx        9448   Mar 01 1993 17:52:15  common.js
    9  -rwx       22152   Mar 01 1993 17:52:15  cms_splash.gif
   10  -rwx        1211   Mar 01 1993 17:52:15  cms_13.html
   11  -rwx        2823   Mar 01 1993 17:52:15  cluster.html
   
!--- output suppressed ---

   
!--- These are the files used by the CMS software.</pre>

Issue the delete flash:html/* command to delete all of these files before the upgrade. Here is a sample command output:
Note: Deletion of these files disables access to the HTML pages during the upgrade. After the upgrade, access becomes available again.
<pre>2950#delete flash:html/*
Delete filename [html/*]?
 
!--- Press ENTER or RETURN for each file.

Delete flash:html/homepage.htm? [confirm] 
Delete flash:html/not_supported.html? [confirm]
Delete flash:html/common.js? [confirm]
Delete flash:html/cms_splash.gif? [confirm]
Delete flash:html/cms_13.html? [confirm]
Delete flash:html/cluster.html? [confirm]

!--- output suppressed ---


2950#dir flash:
Directory of flash:/
    2  -rwx     2774747   Mar 01 1993 17:52:14  c2950-i6q4l2-mz.121-12c.EA1.bin
    4  -rwx         916   Mar 01 1993 03:31:05  vlan.dat
   22  -rwx         312   Mar 01 1993 18:03:19  env_vars
    7  drwx           0   Mar 01 1993 01:13:31  html
    
!--- output suppressed ---

7741440 bytes total (4960256 bytes free)
    
!--- There is now enough room to proceed with the upgrade.</pre>

Issue the archive tar command to copy over the .tar file and extract all the files. The full command syntax is archive tar /xtract tftp://<tftp server ip>/<filename> flash:. Here is a sample command output:
Note: If you want to upgrade from a release earlier than 12.1(6)EA2 on a 2950, issue the tar command instead of the archive tar command.
<pre>2950#archive tar /xtract tftp://20.20.20.2/c2950-i6q4l2-tar.121-13.EA1.tar flash:
Loading c2950-i6q4l2-tar.121-13.EA1.tar from 20.20.20.2 (via Vlan1): !

!--- The IOS image(.bin file) is being extracted into the flash: directory.

extracting c2950-i6q4l2-mz.121-13.EA1.bin (2888547 bytes)!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
html/ (directory)

!--- The CMS files are extracted into the html directory.

extracting html/homepage.htm (3994 bytes)!
extracting html/not_supported.html (1392 bytes)
extracting html/common.js (9529 bytes)!!
extracting html/cms_splash.gif (22152 bytes)!!!!!
extracting html/cms_13.html (1211 bytes)
extracting html/cluster.html (2823 bytes)!
extracting html/Redirect.jar (4195 bytes)!
extracting html/mono_disc.sgz (15899 bytes)!!!
extracting html/CMS.sgz (1344455 bytes)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
extracting html/images.sgz (86918 bytes)!!!!!!!!!!!!!!!!!
extracting html/help.sgz (287994 bytes)!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
!!!!!!!!!!!!!!!
extracting html/CiscoChartPanel.sgz (135599 bytes)!!!!!!!!!!!!!!!!!!!!!!
extracting html/cms_boot.jar (58864 bytes)!!!!!!!!!!!!
extracting info (109 bytes)
extracting info.ver (109 bytes)
[OK - 4877312 bytes]

!--- The archive tar operation completed successfully.

2950#
2950#verify flash:c2950-i6q4l2-mz.121-13.EA1.bin
Verified flash:c2950-i6q4l2-tar.121-13.EA1.bin

!--- Issue the verify command to verify the IOS image checksum.

2950#

2950#dir flash:
Directory of flash:/
  2  -rwx  2774747  Mar 01 1993 17:52:14  c2950-i6q4l2-mz.121-12c.EA1.bin
  3  -rwx  2888547  Mar 01 1993 02:00:32  c2950-i6q4l2-mz.121-13.EA1.bin
    
!--- The new IOS image has been extracted and installed in flash:.

  4  -rwx      916  Mar 01 1993 03:31:05  vlan.dat
 22  -rwx      312  Mar 01 1993 18:03:19  env_vars
  7  drwx      832  Mar 01 1993 02:03:41  html
    
!--- output suppressed ---

7741440 bytes total (93184 bytes free)
2950#
2950#dir html
Directory of flash:/html/
    5  -rwx        3994   Mar 01 1993 02:00:32  homepage.htm
    6  -rwx        1392   Mar 01 1993 02:00:32  not_supported.html
    8  -rwx        9529   Mar 01 1993 02:00:32  common.js
    9  -rwx       22152   Mar 01 1993 02:00:33  cms_splash.gif
   10  -rwx        1211   Mar 01 1993 02:00:33  cms_13.html
    
!--- output suppressed ---
!--- The new CMS files have been extracted and installed.</pre>

Set a boot system statement so the new image boots on the next reload. Here is a sample command output:
<pre>2950#conf t
2950(config)#boot system flash:c2950-i6q4l2-mz.121-13.EA1.bin
2950(config)#end
2950#
2950#sh boot
BOOT path-list:   flash:c2950-i6q4l2-mz.121-13.EA1.bin

!--- output suppressed ---
!--- The boot system statement does not show up in the config.
!--- Issue the show boot command to verify whether the 
!--- new image boots on the next reload of the switch.</pre>

You can set a boot system statement to boot a specific backup image if the new image fails for some reason. Otherwise, the 2950/2955 automatically attempts to boot the next valid image in the event of a failure.
Here is a sample command output to configure a boot system statement for multiple images:
<pre>2950#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
2950(config)#boot system flash:
   c2950-i6q4l2-mz.121-13.EA1.bin;c2950-i6q4l2-mz.121-12c.EA1.bin

!--- A semi-colon separates the two images - primary and backup.

2950(config)#end
2950#

2950#sh boot
BOOT path-list: flash:
   c2950-i6q4l2-mz.121-13.EA1.bin;c2950-i6q4l2-mz.121-12c.EA1.bin

!--- output suppressed ---
!--- The boot system statement does not show up in the config.
!--- Issue the show boot command to verify whether the new image
!--- boots on the next reload of the switch.</pre>

Issue the wr mem command to save your changes and reload the switch. Here is a sample command output:
<pre>2950#wr mem
Building configuration...
[OK]
2950#reload
Proceed with reload? [confirm]

!--- Press RETURN or ENTER.

02:53:37: Bootstrap Emulator called with code 45
02:53:37: %SYS-5-RELOAD: Reload requested

!--- Press RETURN or ENTER.</pre>

Verify you run the new image with the show version command. Here is a sample command output:
<pre>2950#sh ver
Cisco Internetwork Operating System Software
IOS (tm) C2950 Software (C2950-I6Q4L2-M), Version 12.1(13)EA1,
RELEASE SOFTWARE

!--- You now run the new software.

(fc1)
Copyright (c) 1986-2003 by cisco Systems, Inc.

!--- output suppressed ---

System image file is "flash:c2950-i6q4l2-mz.121-13.EA1.bin"
cisco WS-C2950-24 (RC32300) processor (revision G0)
with 20839K bytes of memory.
Processor board ID FHK0650X0QY
Last reset from system-reset
Running Standard Image

!--- output suppressed ---
!--- You run the SI feature set. If this model of switch
!--- can run the EI, you see Running Enhanced Image.</pre>
This completes the upgrade procedure for a 2950 through the CMS image (.tar file).