@Joseph-TP 

Dear TP-Link Support Team,

I would like to report a reproducible bug on the Archer AX11000 (us) V1.0, related to the DHCP client in the 2.x firmware branch, specifically when the device is configured in Access Point (AP) mode.

🔧 Device Details

• Model: Archer AX11000 (US)

• Hardware Version: V1.0

• Affected Firmware: 2.2.1 Build 20250725

• Stable Firmware (no issue): 1.3.4 Build 20230906

• Operating Mode: Access Point (AP), LAN DHCP disabled

• DHCP Server: ISP ONT (working correctly)

❗ Problem Description

Even though the DHCP server correctly assigns a lease time of 86400 seconds (24 hours), the router incorrectly enters the DHCP renewal state every 30–40 seconds.

The following log entries are repeatedly observed:

DHCPC INFO receive ack from server with ip 192.168.1.x, lease=86400 DHCPC INFO send select request DHCPC INFO 1/2 lease passed, enter renewing state

This behavior occurs far before half of the lease time has elapsed, which is technically incorrect according to standard DHCP T1/T2 timing.

🧪 Observed Behavior

• The DHCPC process continues running even in AP mode

• DHCP renewals occur continuously

• This causes noticeable micro-disconnections, especially on mobile devices (Wi-Fi shows “connected without internet”)

• The issue does not occur when a client connects directly to the DHCP server (ONT)

✅ Tests Performed

• ISP replaced the ONT (issue persists)

• LAN DHCP disabled

• AP mode enabled

• Verified correct lease assignment from the DHCP server

• The issue disappears when:

  • Using LAN-to-LAN connection (WAN port not used), or

  • Downgrading to firmware 1.3.4 Build 20230906

🧠 Technical Conclusion

All evidence suggests that:

• The WAN DHCP client is not properly disabled in AP mode in firmware branch 2.x

• There is an error in the DHCP lease timer handling (T1/T2)

• The issue is not related to the ISP or DHCP server