Do anyone had design a pair of SBC each located in different location with HA mode?

Hi Guys,

I'm working on building  HA in a pair of SBC at 2 different location.

Can anyone suggest how the IP addressing should be for S0P0 and S0P1 for SBC 1 and SBC 2 in different location.

Assume if they gave IP segment 10.100.100.10/28 for location A and 10.101.101.10 /28 at location B.

I configured my interface S0P0 in SBC 1 which HA pair SBC 2 at another location.

S0P0 configured as below

10.100.100.10 - ip address

10.100.100.11 - primary utility address

10.100.100.12 -seondary utility address

GW 10.100.100.1

S0P1 configured as below

10.101.101.10 - ip address

10.101.101.11 - primary utility address

10.101.101.12 -seondary utility address

GW  10.101.101.1

But once configured i'm getting alarm gateway 10.101.101.1 can't reachable from port S0P1.