Subnet Conflict

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John Harrold

• July 08, 2024 15:04

I've had this message since I started using my firewalla. I have two WANs that I use in failover mode. The first is my fiber from AT&T and the failover is a Starlink connection. I get this error:

 

Subnet Conflict

The subnets of AT&T fiber (192.168.1.77/24), Starlink (192.168.1.21/24) overlapped. Please check your network settings and resolve the conflict. 

I'm not exactly sure what I need to change here.

Thank you,

John

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  Firewalla

  • July 08, 2024 16:53

  You will need to renumber one of the links to something that's not 192.168.1.x (say 192.168.2.x)

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  John Harrold

  • July 23, 2024 15:37

  In case anyone runs into this. I don't think Starlink allows this level of customization. On AT&T I had to do the following:

  • Go here: http://192.168.2.254/
  • Click on Home Network —> Configure
  • Then go to Subnets and DHCP and change the 192.168.1 to 192.168.2 in three locations (Device IPv4 Address, DHCPv4 Start Address and DHCPv4 End Address). 

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