When the publisher is beyond repair, you can install a new server with this ISO, restore the latest DRS backup, and re-add subscribers.
If you lose SSH root access or the CLI administrator account (platform admin), the ISO provides a recovery shell that bypasses the installed OS. From there, you can reset passwords.
Scenario: Rebuilding a failed publisher from a known good backup. Bootable UCSInstall UCOS UNRST 8.6.2.10000-14.sgn.iso
Steps:
Critical: The hostname and IP address of the new node must match the original backup’s node configuration. Otherwise, restore fails. When the publisher is beyond repair, you can
Check the MD5/SHA256 from Cisco’s download page against your file.
Windows (PowerShell as Admin):
Get-FileHash .\Bootable_UCSInstall_UCOS_UNRST_8.6.2.10000-14.sgn.iso -Algorithm SHA256
Linux/macOS:
shasum -a 256 Bootable_UCSInstall_UCOS_UNRST_8.6.2.10000-14.sgn.iso
If the hash does not match, re-download. A corrupt .sgn file is unrecoverable. If you lose SSH root access or the
Old certificates often expire during downtime. Regenerate the tomcat certificate:
set cert regenerate tomcat
utils service restart Cisco Tomcat