Disaster Recovery; Verifying Proper Configuration Of A New System - Nortel SCS User Manual

Disaster recovery

Included with your Software Communication System (SCS) is a startup CD that you can use if you need to recover from a disaster.
Note To recover from a disaster, it is good practice to have a current backup. Please refer to the SCS administration guide for
information on backing up and restoring your SCS data.
To use the SCS installation CD, perform the following steps:
1 Before you load the SCS CD, set the BIOS for your server to boot from the CD ROM drive first, power down the server after you
insert the CD into the CD drive, and then restart the server.
After you restart the server from the CD, the welcome screen appears.
2 Press Enter to start the installation.
Note Any data that exists on the hard drive is deleted during installation.
Installation of CentOS 4 Enterprise Linux begins. Your hard drive is automatically partitioned and formatted according to the SCS
administration manual.
Tip Make sure you remove the CD from the CD ROM prior to the system rebooting. Otherwise, installation will begin again.
After CentOS installation is complete, the system restarts and SCS configuration starts.
3 Perform the steps in Installing a new Software Communication System on

Verifying proper configuration of a new system

After performing an initial SCS installation on a system in a lab environment or in a production environment, you may want to build a
new system or move from a lab system to a production system. In any scenario, ensure you verify that your hosts file and your DNS
entries match correctly.
Make sure that your system has a fully qualified host name; otherwise, your system will not function.
1 Type the following command at an SCS command prompt:
cat /etc/hosts
2 Add the following lines to /etc/hosts:
127.0.0.1 localhost localhost.localdomain
xxx.xxx.xxx.xxx FQDN hostname
Test host and domain name settings
Enter the following commands at a command prompt to verify host and domain name settings:
hostname (outputs your hostname)
hostname -s (outputs the hostname only)
hostname -f (outputs the fully qualified name)
hostname -d (outputs the domain name)
Verify DNS name resolution
To test that the Server Default Address matches the DNS IP Address, type the following command at a command prompt:
dig FQDN (returns an IP address)
Note To view the results of the command look in the Answer section of the output. If the Answer section is missing or displaying an
incorrect IP addess, you have a DNS issue. Recheck your DNS entries and your Linux server configuration.
2007 Nortel Software Communication System v1.0
Verifying proper configuration of a new system
page 8 to install and configure SCS.
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