Configuring Dynamic Domain Name Resolution - HPE FlexNetwork HSR6800 Configuration Manual

Configuring dynamic domain name resolution

To use dynamic domain name resolution, a DNS server address is required so that DNS queries can
be sent to a correct server for resolution.
In addition, you can configure a DNS suffix that the system automatically adds to the incomplete
domain name that a user enters.
Configuration guidelines
Follow these guidelines when you configure dynamic domain name resolution:
•
In system view, you can specify a maximum of six DNS server IPv4 addresses for the public
network or each VPN instance. You can specify DNS server IPv4 addresses for both public
network and VPN instances.
•
In system view, you can specify a maximum of six DNS server IPv6 addresses for the public
network or each VPN instance. You can specify DNS server IPv6 addresses for both public
network and VPN instances.
•
In interface view, you can specify a maximum of six DNS server IPv4 addresses for the public
network or each VPN instance. You can specify DNS server IPv4 addresses for both public
network and VPN instances.
•
An IPv4 DNS query is first sent to the DNS server IPv4 addresses. If no reply is received, it is
sent to the DNS server IPv6 addresses.
•
A DNS server address specified in system view takes priority over a DNS server address
specified in interface view. A DNS server address specified earlier has a higher priority. A DNS
server address manually specified takes priority over a DNS server address dynamically
obtained, for example, through DHCP. The device first sends a DNS query to the DNS server
address of the highest priority. If the first query fails, it sends the DNS query to the DNS server
address of the second highest priority, and so on.
•
You can configure a maximum of 16 DNS suffixes for the public network or each VPN instance.
You can configure DNS suffixes for both public network and VPN instances.
•
A DNS suffix manually configured takes priority over a DNS suffix dynamically obtained, for
example, through DHCP. A DNS suffix configured earlier has a higher priority. The device first
uses the suffix that has the highest priority. If the query fails, the device uses the suffix that has
the second highest priority, and so on.
Configuration procedure
To configure dynamic domain name resolution:
Step
1. Enter system view.
2. (Optional.) Configure a
DNS suffix.
3. Specify a DNS server
IPv4 address in system
view.
4. Specify a DNS server
IPv4 address in
interface view.
Command
system-view
dns domain domain-name [ vpn-instance
vpn-instance-name ]
dns server ip-address [ vpn-instance
vpn-instance-name ]
a Enter interface view:
interface interface-type
interface-number
b Specify a DNS server IPv4 address:
dns server ip-address [ vpn-instance
vpn-instance-name ]
89
Remarks
N/A
By default, no DNS suffix is
configured and only the
domain name that a user
enters is resolved.
Perform one or more of the
tasks.
By default, no DNS server
address is specified.