LAN IP of ER605 same as ISP modem's LAN IP - Can't access internet

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LAN IP of ER605 same as ISP modem's LAN IP - Can't access internet

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LAN IP of ER605 same as ISP modem's LAN IP - Can't access internet
LAN IP of ER605 same as ISP modem's LAN IP - Can't access internet
2023-07-28 03:38:22
Model: ER605 (TL-R605)  
Hardware Version: V2
Firmware Version:

Hi there,

 

I am trying to setup the following equipment: ER605, SG2210-MP, OC200, EAP610 (x3). I am running into a problem right from the start. There is no internet, likely due to a double LAN IP address on the modem and ER605.

 

I have connected a cable from my ISP's modem (an Arris TG3442) to the ER605's WAN port, then a cable from the LAN port from the ER605 to the SG2210-MP switch. The OC200, APs, and my laptop are connected to the switch.

 

I was able to log into the ER605 admin page. When I did the wizard, I got the popup that said "The current WAN IP conflicts with the LAN IP, please change the LAN IP of your device."

 

TLDR - The Problem: Both the ISP's modem LAN IP and the ER605 LAN IP are 192.168.0.1. How do I fix this? I tried changing the LAN of the ER605 to 192.168.1.1 on the admin page of the ER605, along with the Starting/Ending IPs to 192.168.1.1 to 192.168.1.199 respectively. However, the new login page never comes up. I tried cycling the power of the ER605, no joy. When I try to go to 192.168.1.1 it says the page cannot be found. I end up having to factory reset the ER605 and I'm back to square one.

 

I wanted to setup the LAN port on the ISP modem in Bridge mode, but it looks like that's disabled. I'm forced to go through the ISP modem and deal with a double LAN network, so-to-speak, although I want everything to go through the new TP-Link Omada setup.

 

Any suggestions?

 

Thanks in advance.

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Re:LAN IP of ER605 same as ISP modem's LAN IP - Can't access internet
2023-07-28 04:27:12

  @steve1123 

 

Try clear your browser cahe or run browser inkognito..

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Re:LAN IP of ER605 same as ISP modem's LAN IP - Can't access internet
2023-07-31 02:18:36

Hi @steve1123 

Thanks for posting in our business forum.

Without the Internet connection, you connect a computer to the ER605. Set the LAN IP from 192.168.0.1/24 to 192.168.1.1/24

Then you are supposed to reboot the router or reconnect your computer due to the IP change. After a while, you should get the new IP 192.168.1.1/24 and you can access 192.168.1.1 now.

 

This is likely to be the DHCP cache on your computer. The DHCP lease time is not over yet so you cannot access 192.168.1.1 if you don't reconnect the wire or reboot either your computer or the router.

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