Question

During a planned Cisco Unified Communications Manager cluster upgrade, an administrator uploads a new ISO to the SFTP server and initiates the install from the publisher's OS Administration page. The upgrade process halts with an error indicating the checksum or file validation failed, and the readiness check will not proceed. Which action should the administrator take to resolve this before continuing the cluster upgrade?

Accepted Answer

Verify the MD5/SHA512 checksum of the downloaded ISO against the value published on Cisco.com and re-download the file if it does not match

Answer

Disable mixed mode on the cluster so the ITL file does not block the upgrade image

Answer

Change the SFTP server to use FTP instead, because CUCM cannot validate images over SFTP

Answer

Reset the database replication on all subscribers before retrying the upgrade