H3C Technologies H3C S3100 Series Switches - Manual (Page 626)

Operation Manual – DNS
H3C S3100-52P Ethernet Switch Chapter 1 DNS Configuration
1-5
1.4 Displaying and Maintaining DNS
After the above configuration, you can execute the display command in any view to
view the DNS configuration information to verify the configuration effect. And you can
execute the reset command to clear the information stored in the caching memory of
dynamic domain name resolution.
Table 1-3
Display and maintain DNS
Operation Command… Description
Display static DNS list
display ip host
Display the DNS Server
information
display dns server
[ dynamic ]
Display the DNS suffixes
display dns domain
[ dynamic ]
Display the caching
information of dynamic
domain name resolution
display dns
dynamic-host
Available in any view
Display the DNS
resolution result
nslookup type
{ ptr
ip-address
| a
domain-name
}
Available in any view
Reset the caching
memory of dynamic
domain name resolution
reset dns dynamic-host
Available in user view
1.5 Troubleshooting DNS Configuration
I. Symptom
After enabling the dynamic domain name resolution, the user cannot get the IP address
or the IP address is incorrect.
II. Solution
z
Use the display dns dynamic-host command to check that the specified domain
name is in the cache.
z
If there is no defined domain name, check that dynamic domain name resolution is
enabled and the DNS Client can communicate with the DNS Server.
z
If the specified domain name is in the cache, but the IP address is wrong, make
sure the DNS Client has the correct IP address of the DNS Server.
z
Check the mapping list is correct on the DNS Server.