Cisco Systems 78-11741-02 Wireless Office Headset User Manual


 
Configuring IP Addressing
Configuring Address Resolution Methods
IPC-16
Cisco IOS IP Configuration Guide
To keep track of domain names, IP has defined the concept of a name server, whose job is to hold a cache
(or database) of names mapped to IP addresses. To map domain names to IP addresses, you must first
identify the host names, then specify a name server, and enable the Domain Naming System (DNS), the
global naming scheme of the Internet that uniquely identifies network devices. These tasks are described
in the following sections:
Assigning Host Names to IP Addresses
Specifying the Domain Name
Specifying a Name Server
Enabling the DNS
Using the DNS to Discover ISO CLNS Addresses
Assigning Host Names to IP Addresses
The Cisco IOS software maintains a table of host names and their corresponding addresses, also called
a host name-to-address mapping. Higher-layer protocols such as Telnet use host names to identify
network devices (hosts). The router and other network devices must be able to associate host names with
IP addresses to communicate with other IP devices. Host names and IP addresses can be associated with
one another through static or dynamic means.
Manually assigning host names to addresses is useful when dynamic mapping is not available.
To assign host names to addresses, use the following command in global configuration mode:
Specifying the Domain Name
You can specify a default domain name that the Cisco IOS software will use to complete domain name
requests. You can specify either a single domain name or a list of domain names. Any IP host name that
does not contain a domain name will have the domain name you specify appended to it before being
added to the host table.
To specify a domain name or names, use either of the following commands in global configuration mode:
See the “IP Domains Example” section at the end of this chapter for an example of establishing IP
domains.
Command Purpose
Router(config)# ip host name [tcp-port-number]
address1 [address2...address8]
Statically associates host names with IP addresses.
Command Purpose
Router(config)# ip domain name name
Defines a default domain name that the Cisco IOS software will use
to complete unqualified host names.
Router(config)# ip domain list name
Defines a list of default domain names to complete unqualified host
names.