Oracle Application Server B32100-01 Installation Manual page 189

non-authoritative requests to the external DNS servers. The external DNS servers
do not know about the existence of the internal DNS servers. See
Figure 10–2 Method 1: Using DNS Servers
External DNS Server
Internal DNS Server
for the Production Site
asinfra asmid1
Production Site
Method 1 Details
Make sure the external DNS names are defined in the external DNS zone.
a.
Example:
prodmid1.us.oracle.com
prodmid2.us.oracle.com
prodinf.us.oracle.com
standbymid1.us.oracle.com IN A 213.2.2.330
standbymid2.us.oracle.com IN A 213.2.2.331
standbyinf.us.oracle.com
At the production site, create a new zone at the production site using a
b.
domain name different from your external domain name. To do this, populate
the zone data files with entries for each node in the OracleAS Disaster
Recovery environment.
For the infrastructure node, use the virtual name or alias.
For the middle-tier nodes, use the node name (the value in /etc/nodename).
The following example uses "asha" as the domain name for the new zone.
asmid1.asha IN A 138.1.2.333
asmid2.asha IN A 138.1.2.444
asinfra.asha IN A 138.1.2.111
Do the same for the standby site. Use the same domain name that you used for
the production site.
asmid1.asha IN A 213.2.2.330
asmid1.asha IN A 213.2.2.331
asinfra.asha IN A 213.2.2.110
Configure the DNS resolver to point to the internal DNS servers instead of the
c.
external DNS server.
In the /etc/resolv.conf file for each node on the production site, replace
the existing name server IP address with the IP address of the internal DNS
server for the production site.
Installing in High Availability Environments: OracleAS Disaster Recovery 10-5
Setting up the OracleAS Disaster Recovery Environment
External DNS Server
Internal DNS Server
for the Standby Site
asmid2 asinfra
Standby Site
IN A 138.1.2.333
IN A 138.1.2.444
IN A 138.1.2.111
IN A 213.2.2.110
Figure 10–2.
External DNS Server
asmid1 asmid2