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DRF Backup or Restore Failure CUCM or CUC

DRF Backup or Restore Failure CUCM or CUC

You may at times receive an error “109-Unable to transfer the tar file over SFTP channel as currently configured SFTP server does not support output stream” while taking Backup or Restore in Cisco Unified Communication Manager or Cisco Unity Connection. If so, refer to the below recommendations.

  1. Ensure that you are using a good SFTP application like Titan or Cygwin while works great as a SFTP Application.
  2. Ensure that there are no network issues between the SFTP Server and Cisco Unified Communication Manager/Cisco Unity Connection.  If there are any network issues which is not fixed, the error will be seen again and again.
  3. If there are no network issues between SFTP Server and CUCM/CUC and you are also using an application like Titan or Cygwin then, re-run the backup/restore whenever fails. Sometimes re-running the backup/restore may succeed if it was an intermittent issue earlier.

Hope this helps!!

Published by Team UC Collabing

One thought on “DRF Backup or Restore Failure CUCM or CUC”

  1. Administrator
    Administrator says:

    Most of the certificates used in CUCM after a fresh installation are self-signed certificates issued, by default, for five years. It is critical for good functionality of the system to have all certificates updated across the CUCM cluster. If your certificates are expired or invalid they might significantly affect normal functionality of the system:
    Disaster Recovery System (DRS)/Disaster Recovery Framework (DRF) might not function properly.

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Electrical Engineer CCNA Collaboration CCNA Voice CCNA R&S. I'm Electrical Engineer and I work like Support Engineer for a Telephony Service Provider Company. Before that I had position like Pre-Sale Engineer about small and medium multivendor telephony solutions. I have 5 years of experience working in Telephony Multivendor Projects. I am also 3 years of experience working in Support and implementation about Cisco Collaboration platforms: UCS server, UCM, Cisco Unity, Presence Server, Jabber, Gateway. Support Community is most useful in finding design, implementation and support tricks and shortcuts that greatly help me in my daily activities. If you need to contact me, please you can writte me.


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Am a technology enthusiast. I work in network support providing support with implementation, maintaining and precisely troubleshooting the infra.
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