3Com Switch 8807, Configuration Manual

Page: 710 / 883

710 C
HAPTER
58: DNS C
ONFIGURATION
"3Com", the system regards it as a host name and add a domain name suffix to
search. After all the domain names are failed to be searched out in this way, the
system finally searches with the primarily input domain name. If the input domain
name does include ".", like "www.3Com", the system searches with it directly.
The system adds each suffix to search one by one only after the search fails. If the
input domain name contains a "." in the final position, like "3Com.com.", it
indicates that the domain name suffix needs not to be added. The system removes
the last "." from the input domain name and search with the remaining part.
Succeeded or not, the system returns to the originally input domain name. Put it
more specifically, if the last character of the input domain name is ".", the system
only searches according to characters before the "." rather than matches the
domain name. In this sense, the last "." is also called "search terminator".
Configuring Static
Domain Name
Resolution
You can use this command to map the host name to the host IP address. When
you use applications like Telnet, you can use the host name directly, and the
system translates it into the IP address, rather than the obscure IP address.
Perform the following configuration in system view.
Each host can have only one IP address. If you configure a host name more than
once, then the IP address configured at last is effective.
Configuring Dynamic
Domain Name
Resolution
Dynamic domain name resolution configuration includes:
■
“Enable/Disable Static Domain Name Resolution”
■
“Configure the IP Address of Domain Name Server”
■
“Configure Domain Name Suffix”
Enable/Disable Static
Domain Name
Resolution
You can use the following command to enable dynamic domain name resolution.
However, since dynamic domain name resolution may take some time, you can
disable this function when you do not want to perform dynamic domain name
resolution sometimes.
Perform the following configuration in system view.
By default, dynamic domain name resolution is disabled.
Table 656 Configure host name and the corresponding IP address
Operation Command
Configure host name and the corresponding
IP address
ip host hostname ip - address
Cancel host name and the corresponding IP
address
undo ip host hostname [ ip - address ]
Table 657 Enable/disable dynamic domain name resolution
Operation Command
Enable dynamic domain name resolution dns resolve
Disable dynamic domain name resolution undo dns resolve