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Is SMB Multichannel supported when the storage is behind a NAT?

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Category:
ontap-9
Specialty:
nas
Last Updated:

Applies to

  • ONTAP 9
  • SMB Multichannel

Answer

  • No, multichannel is not supported if the storage IPs are obscured behind NATTed IP address/es.
    • This is because the storage is unaware of the NATTing and cannot respond with the NATTed IP address/es.

Additional Information

  • Multichannel uses the IOCTL command "FSCTL_Query_Network_Interface_Info" which responds with the storage IP address for the purposes of Multichannel.
  • The IP in question is behind a NATTed address and it is unreachable, so Multichannel will fail if it is attempted.

 

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