Upgrade Cisco IOS on the 877W

Cisco LogoYesterday it struck me I was using a less secure wireless setup while the more secure was just a simple configuration change away. While adjusting the configuration I noticed the software version was pretty dated because my last IOS update (12.4.24T1) was from May 2009. To stay current I decided to upgrade my home router.

12.4.24T8 is the latest IOS in the 12.4T series. This version was released on 19 September 2012. I don’t have enough flash capacity to store the new 15.1.4 release, so I will stick with the 12.4.24 release. So I downloaded c870-advipservicesk9-mz.124-24.T8.bin from Cisco.

I have described the steps below so it will be a walk in the park next time.

1. Show current image:

router#show flash
24576K bytes of processor board System flash (Intel Strataflash)

Directory of flash:/

2  -rwx    21839140   Aug 9 2009 19:15:03 +02:00  c870-advipservicesk9-mz.124-24.T1.bin
4  -rwx      833024   Mar 1 2002 01:09:03 +01:00  es.tar
6  -rwx        1038   Mar 1 2002 01:09:35 +01:00  home.shtml
7  -rwx      102400   Mar 1 2002 01:09:46 +01:00  home.tar
9  -rwx      491213   Mar 1 2002 01:10:29 +01:00  128MB.sdf
10  -rwx         720   Aug 9 2009 14:51:55 +02:00  vlan.dat

23482368 bytes total (206848 bytes free)

2. Backup current IOS:

router#copy flash:c870-advipservicesk9-mz.124-24.T1.bin scp://username@
Address or name of remote host []?
Destination username [username]?
Destination filename [c870-advipservicesk9-mz.124-24.T1.bin]?
Writing c870-advipservicesk9-mz.124-24.T1.bin
Sink: C0644 21839140 c870-advipservicesk9-mz.124-24.T1.bin
21839140 bytes copied in 78.516 secs (278149 bytes/sec)

3. Delete current:

router#delete flash:c870-advipservicesk9-mz.124-24.T1.bin
Delete filename [c870-advipservicesk9-mz.124-24.T1.bin]? 
Delete flash:/c870-advipservicesk9-mz.124-24.T1.bin? [confirm]

4. Upload new:

router#copy scp://username@ flash:
Address or name of remote host []? 
Source username [username]? 
Source filename [c870-advipservicesk9-mz.124-24.T8.bin]? 
Destination filename [c870-advipservicesk9-mz.124-24.T8.bin]? 

 Sending file modes: C0644 21910432 c870-advipservicesk9-mz.124-24.T8.bin
21910432 bytes copied in 559.124 secs (39187 bytes/sec)

5 Verify:

router#verify flash:c870-advipservicesk9-mz.124-24.T8.bin
Verifying file integrity of flash:c870-advipservicesk9 mz.124-24.T8.bin..................Done!
Embedded Hash   MD5 : 669928343C5569E5118A8B6CCBFBB093
Computed Hash   MD5 : 669928343C5569E5118A8B6CCBFBB093
CCO Hash        MD5 : F7E40B7C2C6FFF7011610B5A33D6E660

Embedded hash verification successful.
File system hash verification failed for file flash:c870-advipservicesk9-mz.124-24.T8.bin(No such file or directory).

6. Set startup image and reload:

router#conf t
Enter configuration commands, one per line.  End with CNTL/Z.
router(config)#boot system flash:c870-advipservicesk9-mz.124-24.T8.bin
router#write mem 
Building configuration...

Wait to let the system start up with the new image.

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