Configuring dynamic domain name resolution
To send DNS queries to a correct server for resolution, you must enable dynamic domain name resolution and configure DNS servers. A DNS server manually configured takes precedence over the one dynamically obtained through DHCP, and a DNS server configured earlier takes precedence. A name query is first sent to the DNS server that has the highest priority. If no reply is received, it is sent to the DNS server that has the second highest priority, and so on.
In addition, you can configure a DNS suffix that the system automatically adds to the provided domain name for resolution. A DNS suffix manually configured takes precedence over the one dynamically obtained through DHCP, and a DNS suffix configured earlier takes precedence. The DNS resolver first uses the suffix that has the highest priority. If the name resolution fails, the DNS resolver uses the suffix that has the second highest priority, and so on.
Configuration guidelines
Follow these guidelines when you configure dynamic domain name resolution:
Specify a maximum of six DNS server IPv4 addresses.
Specify a maximum of six DNS server IPv6 addresses.
An IPv6 name query is first sent to the IPv6 DNS servers. If no reply is received, it is sent to the IPv4 DNS servers.
Specify a maximum of 16 DNS suffixes.
Configuration procedure
To configure dynamic domain name resolution:
Step | Command | Remarks |
|---|---|---|
1. Enter system view. | system-view | N/A |
2. Specify a DNS server. |
| By default, no DNS server is specified. You can specify both the IPv4 and IPv6 addresses. |
3. (Optional.) Configure a DNS suffix. | dns domain domain-name | By default, no DNS suffix is configured. Only the provided domain name is resolved. |