It looks like you're trying to use the LAN/HA configuration with a WAN/DR setup. That is technically possible provided you can extend your layer 3 boundary out to your DR location, but most people are not that fortunate. If that's the design you're going with then ignore instructions related to WAN/DR configuration in the Administrators Guide and read only the LAN/HA configuration steps. In a LAN/HA configuration it's expected that the IP address of the primary network interface will be the same for both primary and secondary servers. In a WAN/DR mode, each site has it's own unique layer 3 address space and both primary and secondary servers are in different subnets. As such each primary network interface will have it's own unique IP address.
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