3com 8807 User Guide

C

HAPTER

 58: DNS C

ONFIGURATION

Figure 167   Network diagram for DNS client

# Enable dynamic domain name resolution

[SW8800] dns resolve 

# Configure the IP address of the domain name server to 172.16.1.1.

[SW8800] dns server 172.16.1.1 

# Configure the domain name suffix as com.

[SW8800] dns domain com 

# Ping a host with the specified domain name.

[SW8800] ping ftp

 

 Trying DNS server (172.16.1.1)

 

  PING ftp.com (200.200.200.200): 56  data bytes, press CTRL_C to break

 

    Reply from 200.200.200.200: bytes=56 Sequence=1 ttl=128 time=2 ms

 

    Reply from 200.200.200.200: bytes=56 Sequence=2 ttl=128 time=2 ms

 

    Reply from 200.200.200.200: bytes=56 Sequence=3 ttl=128 time=2 ms

 

    Reply from 200.200.200.200: bytes=56 Sequence=4 ttl=128 time=2 ms

 

    Reply from 200.200.200.200: bytes=56 Sequence=5 ttl=128 time=2 ms

 

 
  --- ftp.com ping statistics ---

 

    5 packet(s) transmitted

 

    5 packet(s) received

 

    0.00% packet loss

 

    round-trip min/avg/max = 2/2/2 ms 

The routing configuration between the switch and the domain name sever is 
omitted here, and refer to the related chapter for the configuration.

Fault: Domain name resolution fails.

Troubleshoot: Perform the following procedures:

■

Check whether the domain name resolution function is enabled.

■

Check whether the IP address of the domain name sever is correctly 
configured.

■

Check whether there is a correct route between the domain name sever and 
the switch.

■

Check whether there is network connection failure, such as network cable 
break, loose connection, and so on.

DNS Server

Switch

Internet

172.16.1.1