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WAN / DHCP Connection Freeze After Internet Disconnect

WAN / DHCP Connection Freeze After Internet Disconnect

WAN / DHCP Connection Freeze After Internet Disconnect
WAN / DHCP Connection Freeze After Internet Disconnect
Yesterday
Tags: #Network Connectivity #Firmware Update
Model: Archer BE550  
Hardware Version: V2
Firmware Version: Latest Firmware

Hello,

I am using the fully updated Archer BE550 (V2) router connected directly to a NanoStation setup via Dynamic IP (DHCP).

I am facing a persistent WAN connection freeze bug. Whenever the internet drops from the ISP side or the NanoStation reboots, the router completely freezes on the WAN port and fails to renew or pull a new IP address automatically. 

The internet never comes back on its own until I manually go to the router's web interface and trigger a MAC Clone (changing the MAC address) to force a new DHCP request. 

Please investigate this WAN/DHCP lease bug for the V2 hardware and include a fix in the upcoming firmware updates. Thank you.

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Re:WAN / DHCP Connection Freeze After Internet Disconnect
14 hours ago

Hello @Noah_7 ,

Welcome to our community.

 

Here is some information we need to confirm with you:

  • May I know if your network topology diagram is as follows: ISP modem—BE550)))((( client devices

(Note: — stands for wired connection,)))((( stands for wireless connection )

  • Please make sure your router's firmware is fully up to date. And let us know the firmware version. How to find the hardware and firmware version of my TP-Link device 
  • Additionally, you mentioned that triggering the MAC address cloning function can force a successful DHCP request; do you mean that a random MAC address needs to be generated each time?

 

Now, please try the following steps to address the WAN connection problems:

  • Check the physical connection: Make sure the Ethernet cable between your NanoStation and the router's WAN port is firmly connected. Try replacing the cable with a new one if possible.
  • Change the DNS servers: Log into the web interface, go to Advanced > Network > Internet > Advanced Settings, and set the DNS servers to 1.1.1.1 and 8.8.8.8. 
  • Test in isolation: Temporarily disconnect all LAN/Ethernet devices from the router and disconnect all wireless clients, then simulate a WAN drop to see if the router recovers on its own. This helps determine if a connected device is interfering with the DHCP renewal process.

 

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Re:WAN / DHCP Connection Freeze After Internet Disconnect
11 hours ago

  @Joseph-TP 

Hi Joseph,

Thank you for the response. Here are the confirmations regarding my network and the steps I've taken:

1 Network Topology: Yes, your diagram is completely correct. The setup is: ISP PowerBeam M5 (acting as a router with PPPoE) ──[Wired]──> BE550 WAN Port )))[Wireless])))> Client Devices.

2 Firmware Version: My router is fully up to date. The current version is: ⁠1.2.6 Build 20260105 rel.23037(4555)⁠ on Hardware ⁠Archer BE550 v2.0⁠.

3 MAC Cloning: Yes, exactly. Every time the internet disconnects from the ISP side, the BE550's WAN freezes and cannot pull a new IP automatically. The only way to force it to recover without a reboot is to generate a new, random MAC address under the MAC Clone settings each time.

Regarding the troubleshooting steps:

 I checked the Ethernet cable and port connection, and everything is firmly connected and physically sound.

 I have changed the DNS servers to ⁠1.1.1.1⁠ and ⁠8.8.8.8⁠ as requested.

 Important Update: I recently discovered that the PowerBeam M5 had a default DHCP Lease Time of 600 seconds (10 minutes). I have manually increased it to 86400 seconds (24 hours). This temporary adjustment has significantly improved stability and reduced the freezing frequency.

However, the core software bug remains: when a sudden ISP drop occurs, the BE550 still struggles to handle the DHCP renewal loop effectively and freezes the WAN connection unless a MAC Clone or a full reboot is triggered.

Please share this with your engineering/QA team so they can look into optimizing how the BE550's firmware handles WAN DHCP drops in future updates.

Thank you!

 

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Network Connectivity Firmware Update