Patton electronic SmartNode 4110 Series ユーザーズマニュアル

DNS configuration task list

SmartWare Software Configuration Guide 

You can test the DNS server configuration using the 

 command as follows:

Example: Testing DNS server configuration

node(cfg)#dns-lookup www.patton.com
Name:    www.patton.com
Address: 209.49.110.5

The DNS resolver automatically learns domain name servers if it receives 
them through PPP or DHCP protocols. You can verify that the DNS 
resolver has received domain name servers by using the 

 

command as follows:

node(cfg)#show dns-client
The following DNS servers are currently available:
  Configured IP: 195.186.1.110
  Discovered IP: 81.221.250.10  (Not used)
  Discovered IP: 81.221.252.10  (Not used)
node(cfg)#

Configured IP indicates a domain name server that has been configured as 
shown at the beginning of this section. Discovered IP indicates a domain 
name server that was learned automatically.

Figure 45. DNS relay diagram

DNS (Domain Name System) is a distributed database used in IP networks to provide the numerical IP 
address for a URL’s host name. There are DNS Servers, DNS Relays, and DNS Clients (see 

clients send queries with the host-name of interest to the DNS Server. The DNS server responds with the IP