SMB multichannel enabled but throughput unchanged

Minimal guidance for messy support realities.

Scenario

A newer NAS and clients support SMB multichannel, but transfer speeds remain no better than a single link.

Recommended Resolution Path

  1. Verify the NICs, switch path, and client adapters actually qualify for multichannel.
  2. Check whether RSS, RDMA, or teaming settings are supported and enabled correctly.
  3. Run tests that prove whether the workload is network-bound or storage-bound.
  4. If the hardware cannot really benefit, document that to avoid cargo-cult tuning.

Technician Notes

Document what changed, what confirmed the fix, and whether the issue points to a broader standards gap worth addressing for the client.