Why do Snapshot Replica jobs not use faster network interfaces?
Applicable Products
QTS, QTS Hero
Scenario
If running a QNAP NAS with 1GbE and 10GbE on the same subnet, Snapshot Replica only uses the 1GbE interface.
Workaround
Snapshot Replica uses a SSH tunnel to communicate with other QNAP NAS, so a workaround is to disable the SSH service for the 1GbE interface.
- Open the Control Panel.
- Go to Network & File > Service Binding.
- Check Enable Service Binding.
- Uncheck SSH Service under your 1GbE interface and click Apply.

Further Reading
Why are snapshots or snapshot replication jobs not working properly?