CUCM firmware upgrade 8.6

[Arbenjamin]

Dear all,

We are tried to upgrade the cucm from version 8.0 to 8.6, however, it failed and restore to 8.0 .

In the Software Installation/upgrade page, we found status: unmapped exception null

file checksum detial: file:UCSInstall_UCOS_8.6.2.10000-30.sgn.iso

MD5 Hash Value

The hardware version 7825I4 with 4G ram( 4x 1G ram), so it meet the requimrment of 8.6

Can anyone provide some suggestion for us.

Thank you,.

Ben

[Aaron Harrison]

Hi

Did you download the upgrade from Cisco? If so, have you checked the MD5 checksum against the one displayed when downloading the file?

If it's not a download, can you post your upgrade log file?

Aaron

[Arbenjamin]

Dear arronharrison,

Thank for your kindly reply,

It is download from cisco, but i haven't check the MD5 checksum .

Would you mind providing more information on this issue?

Thank a lot,

Ben    

[Aaron Harrison · Accepted solution]

Hi

Basically on the last page of the download (where you have a list of selected files, and a 'proceed with download' option) you should see an MD5 checksum displayed. It will be a string of characters like so: 534b3054597f23071587f2a6bd17da0d

This is a checksum calculcated by Cisco on the file you are downloading. It's also usually listed in the release notes for your new release of CUCM.

You can use a free MD5 utility such as md5summer or WinMD5 to calculate the MD5 checksum for the file you have downloaded. If they do not match, then your download is corrupt and you have to download it again, then re-check.

It looks like your CUCM has checksummed the file and found it to be corrupt.

Aaron

[Arbenjamin]

Thx for your clear explanation,which helps me a lot.

Ben