HP Matrix Operating Environment Software - Manual (Page 25)

Network configuration
To allow the same IP addresses for primary and replica IO services, when the subnet is spanned
between the Local and Remote Site:
•
The Local Site and the Remote Site must define the same static IP range and it must contain
the IP range of the
primary IO service . At the site with the replica IO service, the IO
administrator must specify a list or a range of IPs (IP exclusion list) in the hpio.properties
file to avoid IP address conflicts. These IP addresses will be reserved for replica IO services
only and cannot be used by any other IO services.
If the subnet is not spanned between the Local and Remote site, the primary and replica IO services
can be assigned IP addresses specific to each site.
NOTE: Matrix recovery management does not perform DNS updates or update the IP configuration
of logical servers associated with IO services during a failover operation. Your Network
Administrator is responsible for making the necessary modifications to ensure that network services
are available if you configure a logical server to use a different IP address or subnet at each site
in the Matrix recovery management configuration.
DR protection for IO services 25