Carp with /30 or 2 different subnets?



  • I may not just be understanding this correctly, but from what I read I cannot use carp if I am on a /30? My ISP only dishes out /30 subnets, I jut bought a block of static IPs in hopes of setting up an autofail over solution.

    For example, my main IP is 24.159.xxx.xxx/30 I just bought another static 24.196.xxx.xxx/30 so obviously I can't setup a virtual WAN IP.

    Is there anything I can do besides routing my /30 IP down to something usable?



  • You can still run in failover… But if the primary firewall fails, all your natting etc. Won't work because you need that third ip.


  • Rebel Alliance Developer Netgate

    No, you cannot to failover or CARP with a /30 on any currently released version.

    With a /30 you only have one IP, the ISP uses the other, so there isn't even an IP for a second node to function.

    On 2.2 that should be possible but not ideal, but that's a long way off.