Hello TP-Link support team,

I would like to report and get guidance on a very specific network issue involving two TP-Link Archer X10 routers.

Network topology:

• ISP cable modem/router (main gateway, DHCP enabled)

• TP-Link Archer X10 #1 connected to the ISP modem via LAN

  • Works perfectly at 500 Mbps symmetric

• TP-Link Archer X10 #2 connected from Archer X10 #1

  • Configured as Access Point

Issue description:

The second Archer X10 (AP) severely limits the connection speed to 10 Mbps, even though:

• All Ethernet ports are Gigabit (1000 Mbps)

• The interface shows LAN ports at 1000 Mbps

• Only the uplink / internet connection is negotiated at 10 Mbps

Even when manually changing or forcing negotiation settings, the interface does not update and the uplink remains capped at 10 Mbps.

What I have already tested:

• Tested two different Ethernet cables:

  • CAT7

  • CAT8
    Both cables were verified and deliver full 500 Mbps when connected directly to Archer X10 #1 or a PC.

• Switched all LAN ports on both routers

• Disabled DHCP server on the second Archer X10

• Connected LAN-to-LAN (not WAN)

• Assigned different LAN IP addresses:

  • Archer X10 #1: 192.168.0.1

  • Archer X10 #2: 192.168.0.61

• Confirmed there is no double NAT

• Factory reset and reconfigured the second Archer X10

• The issue persists regardless of port or cable

Key observation:

• Archer X10 #2 is correctly detected as a client / AP

• LAN ports show 1000 Mbps

• However, the uplink is locked at 10 Mbps, which caps the entire AP performance

Question:

Is this a known issue related to:

• Auto-negotiation bugs?

• Hardware revision or faulty Ethernet port behavior?

• Firmware limitations when running Archer X10 as an Access Point behind another Archer X10?

Any guidance, firmware recommendation, or confirmation of a hardware defect would be greatly appreciated.

Thank you for your time and support.

Best regards.