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    Only VIP no Interface IP

    HA/CARP/VIPs
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    • C
      cmcologne
      last edited by

      Why is it not possible to only assign a CARP-IP to a Interface? We have have 20x /30 Network Interfaces. To use CARP we need to resize every network to /29.

      It would be useful to not assign an ip to the Interface and only create a CARP VIP.

      Is that possible anyway?

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      • V
        viragomann @cmcologne
        last edited by

        @cmcologne said in Only VIP no Interface IP:

        Why is it not possible to only assign a CARP-IP to a Interface?

        Cause the interfaces which are sharing a CARP VIP must be able to communicate over Layer 3. So they need to have a unique IP each within a common subnet.

        It's possible to assign IPs out of a private subnet to the interfaces with some drawbacks.
        You may find threads discussing that topic here in this forum when you search for "CARP with only one public IP".

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