3154 Nokia Network Voyager for IPSO 4.0 Reference GuideConfiguring the Domain Name ServiceIPSO uses the Domain Name Service (DNS) to translate host names into IP addresses. To enableDNS lookups, you must specify the primary DNS server for your system; you can also specifysecondary and tertiary DNS servers. When resolving hostnames, the system consults the primaryname server first, followed by the secondary and tertiary name servers if a failure or time-outoccurs.To configure DNS1. Click DNS under Configuration > System Configuration in the tree view.2. Click the DNS link in the System Configuration section.3. Enter the new domain name in the Domain name text box.4. Enter the IP address of the primary DNS in the Primary name server box; then click Apply.5. (Optional) Enter the IP address of the secondary DNS in the Secondary name server box;then click Apply.6. (Optional) Enter the IP address of the tertiary DNS in the Tertiary name server box; thenclick Apply.7. Click Save to make your changes permanent.Configuring Disk MirroringThe Nokia disk mirroring feature (RAID Level 1) protects against downtime in the event of ahard-disk drive failure in your appliance (for platforms that support the feature). You must havea second hard disk drive installed on your appliance.Disk mirroring gives you the ability to configure a mirror set composed of a source hard diskdrive and a mirror hard disk drive that uses Network Voyager. The hard disk drive in which youinstalled IPSO is your source hard disk drive. When you configure a mirror set, and the hard diskdrives are synchronized (source hard disk drive is fully copied to the mirror hard disk drive), allnew data written to your source hard disk drive is also written to your mirror hard disk drive. Ifyour source hard disk drive fails, your mirror hard disk drive automatically replaces your sourcehard disk drive without interrupting service on your appliance.The source and mirror hard disk drives can be warm swapped on appliances other than IP500Series appliances, which means, you can replace a failed hard disk drive without shutting downyour appliance.In addition to being able to configure a mirror set, you can monitor the status of a mirror set,synchronization time, and system log entries.To create a mirror set1. Click Disk Mirroring under Configuration > System Configuration in the tree view.2. Select the Create check box in the Create Mirror Set table.
