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Chapter 16: Domain Name Service
The Domain Naming System (DNS) service on this switch allows host names to be
mapped to IP addresses using static table entries or by redirection to other name
servers on the network. When a client device designates this switch as a DNS
server, the client will attempt to resolve host names into IP addresses by forwarding
DNS queries to the switch, and waiting for a response.
You can manually configure entries in the DNS table used for mapping domain
names to IP addresses, configure default domain names, or specify one or more
name servers to use for domain name to address translation.
Configuring General DNS Service Parameters
Command Usage
• To enable DNS service on this switch, first configure one or more name servers,
and then enable domain lookup status.
• To append domain names to incomplete host names received from a DNS client
(i.e., not formatted with dotted notation), you can specify a default domain name or
a list of domain names to be tried in sequential order.
• If there is no domain list, the default domain name is used. If there is a domain list,
the system will search it for a corresponding entry. If none is found, the default
domain name is used.
• When an incomplete host name is received by the DNS service on this switch and
a domain name list has been specified, the switch will work through the domain list,
appending each domain name in the list to the host name, and checking with the
specified name servers for a match.
• When more than one name server is specified, the servers are queried in the
specified sequence until a response is received, or the end of the list is reached
with no response.
• Note that if all name servers are deleted, DNS will automatically be disabled.
Command Attributes
• Domain Lookup Status – Enables DNS host name-to-address translation.
• Default Domain Name
18
– Defines the default domain name appended to
incomplete host names. (Range: 1-127 alphanumeric characters)
• Domain Name List
18
– Defines a list of domain names that can be appended to
incomplete host names. (Range: 1-127 alphanumeric characters; 1-3 names)
• Name Server List – Specifies the address of one or more domain name servers
to use for name-to-address resolution. (Range: 1-6 IP addresses)
Note:
When specifying names, do not include the initial dot that separates the host name
from the domain name.
18. Do not include the initial dot that separates the host name from the domain name.
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