User Manual

Rack ATS AP44xx User Manual98
Configure DNS
Path: Configuration > Network > DNS > Configuration
Use the options under Configuration to configure and test the Domain Name System (DNS):
• Override Manual DNS Settings: When enabled, configuration data from other sources (typically
DHCP) takes precedence over the manual configurations set here.
• Primary DNS Server or Secondary DNS Server: Select one of these to specify the IPv4 or IPv6
addresses of the primary and optional secondary DNS server. For the Rack ATS to send e-mail,
you must at least define the IP
address of the primary DNS server.
– The Rack ATS waits up to 15 seconds for a response from the primary DNS server or
secondary DNS server (if specified). If the Rack ATS does not receive a response within that
time, e-mail cannot be sent. Use DNS servers on the same segment as the Rack ATS or on a
nearby segment (but not across a wide-area network [WAN]).
– Define the IP addresses of the DNS servers, then enter the DNS name of a computer on your
network to look up the IP address for that computer to verify correct operation.
• System Name Synchronization: Allow the system name to be synchronized with the host name
so both fields automatically contain the same value.
NOTE: When enabling this feature, the system name identifier can no longer contain a space
character (since it will be synchronized to the host name field).
• Host Name: Configure a host name here and a domain name in the Domain Name field. Users
can then enter a host name in any field in the NMC interface (except e-mail addresses) that
accepts a domain name.
• Domain Name (IPv4/IPv6): Configure the domain name here only. In all other fields in the NMC
interface (except e-mail addresses) that accept domain names, the Rack ATS adds this domain
name when only a host name is entered.
– To override all instances of the expansion of a specified host name by the addition of the
domain name, set the domain name field to its default, somedomain.com, or to 0.0.0.0.
– To override the expansion of a specific host name entry, include a trailing period. The NMC
recognizes a host name with a trailing period (such as mySnmpServer.) as if it were a fully-
qualified domain name and does not append the domain name.
• Domain Name (IPv6): Specify the IPv6 domain name here.
Test DNS configuration
Path: Configuration > Network > DNS > Test
Use this option to send a DNS query that tests the setup of your DNS servers by looking up the IP
address. View the result of a test in the Last Query Response field, or identify the value to be used for
the selected query type:
Query Type Selected Query Question to Use
by Host The URL name of the server
by FQDN The fully qualified domain name of the server, my_server
.my_domain
by IP The IP address of the server
by MX The mail exchange address of the server