Dns Server Configuration - Cisco DS-X9530-SF1-K9 - Supervisor-1 Module - Control Processor Configuration Manual

Chapter 36 Configuring IP Services
S e n d d o c u m e n t a t i o n c o m m e n t s t o m d s f e e d b a c k - d o c @ c i s c o . c o m .

DNS Server Configuration

The DNS client on the switch communicates with the DNS server to perform the IP address-name server
correspondence.
The DNS server may be dropped after two attempts due to one of the following reasons:
•
•
When accessing a Telnet host, if the DNS server is not reachable (for any reason) the switch login prompt
Note
may take a longer time to appear. If so, verify that the DNS server is accurately configured and reachable.
To configure a DNS server, follow these steps:
Command
Step 1
switch# config t
switch(config)#
Step 2
switch(config)# ip domain-lookup
switch(config)# no ip domain-lookup
Step 3
switch(config)# no ip domain-name
cisco.com
switch(config)# ip domain-name
cisco.com
Step 4
switch(config)# ip domain-list
harvard.edu
switch(config)# ip domain-list
stanford.edu
switch(config)# ip domain-list
yale.edu
switch(config)# no ip domain-list
Note
Step 5
switch(config)# ip name-server
15.1.0.1 15.2.0.0
switch(config)# no ip name-server
Note
OL-6973-03, Cisco MDS SAN-OS Release 2.x
The IP address or the switch name is wrongly configured
The DNS server is not reachable due to external reasons (reasons beyond our control)
If you have not configured a domain list, the domain name that you specified with the ip
domain-name global configuration command is used. If you did configure a domain list, the
default domain name is not used. The ip domain-list command is similar to the ip
domain-name command, except that with the ip domain-list command you can define a list of
domains, each to be tried in turn.
Alternatively, you can configure the DNS entry using the switch names (instead of IP
addresses). The configured switch name automatically looks up the corresponding IP address.
Purpose
Enters configuration mode.
Enables the IP Domain Naming System (DNS)-based
host name-to-address translation.
Disables (default) the IP DNS-based host name-address
translation and reverts to the factory default.
Disables the domain name and reverts to the factory
default.
Enables (default) the default domain name feature used
to complete unqualified host names. Any IP host name
that does not contain a domain name (that is, any name
without a dot), will have the dot and cisco.com appended
to it before being added to the host table.
Defines a filter of default domain names to complete
unqualified host names, use the ip domain-list global
configuration command. You can define up to 10 domain
names in this filter. To delete a name from a filter, use the
no form of this command.
Deletes the defined filter and reverts to factory default.
No domains are configured by default.
Specifies the first address (15.1.0.1) as the primary
server and the second address (15.2.0.0) as the secondary
sever. You can configure a maximum of six servers.
Deletes the configured server(s) and reverts to factory
default. No server is configured by default.
Cisco MDS 9000 Family Configuration Guide
DNS Server Configuration
36-23