Asustor NAS

[Enquiries]

Not sure if you guys can help or not, but here goes.

I have 2 Asustor Nas
1. As-204te-3D3C older one
2. AS6604T-041B
the problem is data transf between the 2 at 1Gig. after the AS-204TE-3D3C goes to sleep the NIC goes back to 100meg. then i have trouble getting to run at 1 Gig again ?
thanks in advance if you have any ideas .
i have followed a lot of your videos on setups but nothing seems to work.

[ed]

Yes, that’s actually a known quirk with some of the older Asustor models like the AS-204TE, especially when they wake from sleep. The network interface doesn’t always renegotiate back to 1GbE properly after power-saving states.

Here’s what you can try:
1. Disable network power saving – In ADM, go to Settings → Hardware → Energy Control and disable “Enable network power saving.”
2. Set a static link speed – Log in via SSH and use:

ethtool -s eth0 speed 1000 duplex full autoneg off

This forces 1GbE and prevents fallback to 100Mb.

3. Update firmware on both NAS units to the latest ADM version — older NIC drivers had this issue more frequently.
4. Avoid deep sleep (S3/S4) on the AS-204TE if possible — it’s better to leave it on idle or use scheduled power-off/power-on instead.

Unfortunately, that model’s Realtek NIC and early firmware design make this a recurring issue, so the permanent fix is to keep it awake during transfers or replace it with a newer NAS that maintains full 1GbE link negotiation consistently.