Unable to achieve 2.5 GbE performance on the ASUSTOR NAS; currently capped around 1 Gbps.
Unable to achieve 2.5 GbE performance on the ASUSTOR NAS; currently capped around 1 Gbps.
Hi everyone, I recently purchased an ASUSTOR NAS with two 2.5 GbE ports. My router also features two 2.5 GbE Ethernet connections. I linked the NAS to the router using a CAT6 cable. Both devices list a 2.5 GbE link in their network interfaces. When I run OpenSpeedTest Server to evaluate the connection, the peak speed I see is about 980 Mbps. The test runs directly on the NAS, and I’m testing from a PC on the same local network. To eliminate cable or router issues, I used the same CAT6 cable with my PC, which also has a 2.5 GbE NIC and achieved full 2.5 GbE speed without problems. This leads me to consider three possibilities: maybe there’s a setting missing on the NAS, a limitation in ADM, or perhaps I’m testing incorrectly. Any advice on next steps would be greatly appreciated.
Check the connection of the PC with the router and identify its network interface card. The setup involves a 2.5G link between the NAS and router, while only 1G reaches the client devices. Please share the complete network diagram for further analysis.
The PC connects straight to the router via a CAT 6E cable. My PC's built-in NIC is Realtek, though I don't have the exact model. You mentioned the NAS communicates at 2.5G with the router, while other devices receive less than 1G even when on the LAN. That likely fits since the router only has two 2.5G ports.
Device links will remain limited by the slowest connection. According to the manufacturer’s site, you have four 1Gb LAN ports and two 2.5Gb LAN/WAN ports, with one of these ports able to switch between roles if set up correctly. Connecting the NAS to either the 2.5Gb LAN or WAN port could yield 2.5Gb speeds when multiple devices share the 1Gb LAN ports and connect to the NAS simultaneously. Still, you’ll never surpass 1Gb speeds from a single 1Gb LAN port to the 2.5Gb port.
Absolutely, I understand. For my needs, I could opt for a 2.5G switch.