Troubleshooting Dns Configuration - 3Com 7757 Configuration Manual

Troubleshooting DNS
Configuration
Table 658 Display and maintain DNS
Operation
Display static DNS list
information
Display DNS server
information
Display DNS suffix list
information
Display dynamic DNS cache
information
Clear the dynamic DNS cache. reset dns dynamic-host
Symptom
Dynamic DNS resolution is enabled, but the user cannot get the correct IP address
from a domain name.
Analysis
DNS client needs to be used in conjunction with the DNS server to get the correct
IP address through domain name resolution.
Solution
Use the display dns dynamic-host command to check if the specified domain
■
name is in the cache.
If the specified domain name is in the cache, but the IP address is wrong,
■
ensure that the DNS Client has the correct IP address of the DNS Server.
If the specified domain name is not in the cache, ensure that dynamic DNS
■
resolution is enabled, the DNS Client can normally communicate with the DNS
Server, and the DNS Server works normally.
Check the DNS mapping list is correct on the DNS Server.
■

Troubleshooting DNS Configuration

Command
display ip host
display dns server
[ dynamic ]
display dns domain
display dns dynamic-host
835
Description
You can execute the display
command in any view.
Execute the reset command
in user view.