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DynamicIP for Internet port won't work as expected

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DynamicIP for Internet port won't work as expected

This thread has been locked for further replies. You can start a new thread to share your ideas or ask questions.
DynamicIP for Internet port won't work as expected
DynamicIP for Internet port won't work as expected
2022-10-22 19:36:11
Model: Archer C4000  
Hardware Version: V3
Firmware Version: 1.0.3 Build 20191026 rel.13901(4555)

I have Archer c4000 v3 with last firmware. My ISP allows connection to Internet only by DHCP request from router. The issue that I have with Archer C4000 is if router don't receive fast response from ISP for DHCP request, it assigns IP from his own IP pool of DHCP Server. As a result, I must renew IP for WAN port manually each time after power on. 

Why internal DHCP server response for requests on WAN port? How I can disable it ? And Another problem.  After assign IP to WAN port from internal IP pool (LAN), the router, for unknown reason, changing IP range for my LAN from 192.168.1.1 to 192.168.0.1.  (he announces this when I go to Web interface) I must each time set LAN to 192.168.1.1 because I want to use this range. How I can set desired IP range and to be sure that the router won't change it by self?

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Re:DynamicIP for Internet port won't work as expected
2022-10-23 14:47:01 - last edited 2022-10-23 14:48:39

  @Eugene9999 

 

Hi,

 

The Archer C4000 cannot assign IP addresses to its WAN port on its own.

The WAN IP address is either set by the user himself via "Static IP" or automatically by the DHCP server of the device that is connected to the WAN port when "Dynamic IP" is configured.

 

It is known that some ISP equipment occasionally assigns IP addresses in the 192.168.x.x range for a short time, until the actual IP range and IP address is known to it.

 

If the Archer C4000 detects that an IP address in the 192.168.1.x pool has been assigned to its WAN port (by the DHCP of the ISP device that is connected to it), it senses there is an IP address conflict between the WAN and the LAN and hence switches its own LAN to another IP range to resolve the conflict.

 

I think the best solution would be to not use the IP range 192.168.1.x for the C4000's LAN in this case. Just use anything else that will not cause any conflicts. For example, set the C4000's LAN IP address to 192.168.2.1 or 192.168.10.1 or whatever you'd like instead.

 

Or is there a particullar reason why you must use 192.168.1.1?

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