[SOLVED] CARP with Multiple WAN and /30 WAN subnets

[kyferez]

So I have read the CARP how-to at https://docs.opnsense.org/manual/how-tos/carp.html and understand everything except:

1) If my ISP is only providing a /30 subnet (1 usable IP), what would be the proper way to configure the WAN side? I'd prefer to avoid double-natting the system...

2) If I am also setting up dual WAN, I assume I just create another VHID group for the 2nd WAN and also it would have to be a different subnet. From the example the WAN is 172.18.0.x/24 so following the example I'd make the 2nd WAN 172.18.1.x/24, correct?

3) Is there any way to make the CARP system Active/Active instead of Active/Passive?

Thanks!

[franco]

Hi there,

1) Find a new ISP or get a bigger subnet from them. You need 3 IPs for yourself in the subnet in order to get this up and running.

2) Sounds good, but note you are saying something about a /24 now, not /30...

3) This is a load-balancing/cluster setup, not what CARP is for.


Cheers,
Franco

[kyferez]

Awesome! Thanks for the clarifications Franco!