An EPM System Disaster Recovery deployment requires a means of resolving host references between the production and standby sites. Ensure that your configuration uses one of these options, listed in order of preference:
Production and standby sites are on separate networks.
The fully qualified host names can be the same in both sites.
Production and standby sites have different DNS that resolve the host names to the correct IP address in their network.
The standby site can have a standby DNS that is activated when a disaster occurs.
Production host names are resolved to a local IP address at the standby site by means of an /etc/hosts file.
If the host names must differ between the production and standby sites and there is no separate DNS for the standby site, set up an alias for the production site servers in the standby site as shown in Figure 2, Host Name Alias Setup, so that the main server is the first entry in the alias.
