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error:client error: NFC Storage connection is unavailable. Failed To Create NFC Downstream

After installing Veeam at a clients site and setting it up to replicate a 2 host cluster and san to a single host with storage it tested OK in the test environment. The servers where then IP`d and put into the correct sub net with the relevant gateways etc.

 

Then the replication job was made live and left to run over night. Next morning I checked only to find this error below.

 

error:client error: NFC Storage connection is unavailable. Failed To Create NFC Downstream
failed to create nfc download stream

Now I knew that IP`s had been changed so I tested the following.

From the Veeam server.

Pinged its gateway – OK.
Pinged its DNS servers – OK.
Pinged the source VM hosts – FAIL
Pinged the storage – OK.

The the Veeam side failed on pinging the source hosts, I checked all my local settings which were ok. I went onto my hosts and checked the Local IP settings. It turns out that there was incorrect setting for the hosts gateway. I changed accordingly and the pings were fine.The hosts could not talk back to the Veeam server correctley. Then I set the replication away and it completed successfully.

The point of this post is the error:client error: NFC Storage connection is unavailable. Failed To Create NFC Downstream is generally an IP misconfiguration error or a communications error. So look there first and test the simple tings like pings.

Tags: Storage

Allen White

Allen is a Consultant for ITPS in the North East of England and holds the following accreditations. MCSA, MCSE, MCTS, MCITP, CCA, CCSP, VCP 4,5 and HP ASE, AIS - Network Infrastructure.

Comments (3)

  • Avatar

    Dan

    |

    That’s funny you posted this yesterday and I’m reading it now. Unfortunately I followed the steps and still cannot fix the issue. What’s more confusing is the backup was working 8 days ago and now IDK. I have added your tests to my info! TY

    Reply

  • Avatar

    Craig

    |

    My issue was the DNS server used by VCenter Appliance, VM Host, Guest VMs, and everything else was not responding. Restarted service and error message went away

    Reply

  • Avatar

    Brad I.

    |

    Thanks. This post helped me with the error. Seems I could ping everything except one of the hosts. Fixed that and it started backing up.

    Reply

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