SMB 3 Multichannel Requirements

Multichannel is a feature of SMB 3 that allows multiple wired network connections to share traffic, improving transfer speeds and enhancing reliability.

If you have enabled SMB 3 Multichannel in System Settings > File Services > SMB > Advanced Settings but have not seen a significant speed improvement, check whether the following conditions are met:

1. Both the NAS and the client have multiple network ports, and the number of connected ports on the NAS is an integer multiple of the client's port count.
2. The NAS and client ports can communicate with each other (on the same subnet or with proper routing).
3. All network ports on both the NAS and client have the same speed (otherwise, the system may prioritize the fastest port when ports have different speeds).
4. The client supports SMB 3 Multichannel, including Windows 8, Windows Server 2012, macOS 10.13 (High Sierra) and later.
5. Hard drive and CPU performance are adequate and not a bottleneck.