Configuring Dynamic Domain Name Resolution; Configuring The Dns Proxy - HP 6125XLG Configuration Manual

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 thus in turn.
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 thus in turn.
Configuration guidelines
Follow these guidelines when you configure dynamic domain name resolution:
You can specify DNS server IPv4 addresses for the public network and up to 1024 VPNs, and
•
specify a maximum of six DNS server IPv4 addresses for the public network or each VPN.
You can specify DNS server IPv6 addresses for the public network and up to 1024 VPNs, and
•
specify a maximum of six DNS server IPv6 addresses for the public network or each VPN.
• 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.
You can specify domain name suffixes for the public network and up to 1024 VPNs, and specify a
•
maximum of 16 domain name suffixes for the public network or each VPN.
Configuration procedure
To configure dynamic domain name resolution:
Step
1. Enter system view.
2. Specify a DNS server IP
address.
3. (Optional.) Configure a
DNS suffix.

Configuring the DNS proxy

You can specify multiple DNS servers. The DNS proxy forwards a request to the DNS server that has the
highest priority. If having not received a reply, it forwards the request to a DNS server that has the second
highest priority, and thus in turn.
Command
system-view
•
Specify a DNS server IPv4 address:
dns server ip-address [ vpn-instance
vpn-instance-name ]
•
Specify a DNS server IPv6 address:
ipv6 dns server ipv6-address
[ interface-type interface-number ]
[ vpn-instance vpn-instance-name ]
dns domain domain-name [ vpn-instance
vpn-instance-name ]
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Remarks
N/A
Use at least one command.
By default, no DNS server IP
address is specified.
By default, no DNS suffix is
configured. Only the provided
domain name is resolved.