HA1 link doesn't support /31-bit subnet mask for point-to-point links?

[eugenep]

Hi,

I'm setting up two PA5250s in HA and are connecting them up directly to each other.  Since these are point-to-point links, i tried using a /31-bit subnet mask, as that is our usual norm for point-to-point links as per RFC3201.

Does anyone know why you can't use a /31 for this when they're directly connected to each other?

Thanks,

Eugene

[kiwi · Accepted solution]

Hi @eugenep,

This is currently not supported.

Please ask your SE to add your vote to this feature request : FR ID 3591.

Cheers !

-Kiwi.

[eugenep]

Thanks @kiwi, I will ask my SE now to do that for me.

Regards,

Eugene

[trcpaloalto]

Is /31 IP supported on non HA interfaces?? I.E outside interface towards the internet.

[PradeepKumarMall]

It works. Just todat 20th-August-2022 i configured it on one of ther Interface on PA-3220.

Initially it was not working as there was two layer2 switches, inline. Even it was not working on tagged sub-interface.

I connected Router and Firewall directly. Manually set the firewall's port speed to 100mbps as Router port speed was 100mbps, not 1Gbps and it worked for me.