H3C Technologies H3C S12500-X Series Switches - Manual (Page 90)

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Configuration procedure
To configure dynamic domain name resolution:
Step Command Remarks
1. Enter system view. system-view N/A
2. Specify a DNS server IP
address.
• 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 ]
Use at least one command.
By
default, no DNS server IP
address is specified.
3. (Optional.) Configure a
DNS suffix. dns domain domain-name [ vpn-instance
vpn-instance-name ]
By default, no DNS suffix is
configured and only the
provided domain name is
resolved.
Configuring the IPv6 DNS client
Configuring static domain name resolution
Static domain name resolution allows applications such as Telnet to contact hosts by using host names
instead of IPv6 addresses.
Follow these guidelines when you configure static domain name resolution:
• For the public network or a VPN, each host name maps to only one IPv6 address. The last
configuration for a host name takes effect.
• You can configure host name-to-IPv6 address mappings for the public network and up to 1024
VPNs, and configure a maximum of 1024 host name-to-IPv6 address mappings for the public
network or each VPN.
To configure static domain name resolution:
Step Command Remarks
1. Enter system view. system-view N/A
2. Configure a mapping between
a host name and an IPv6
address.
ipv6 host host-name ipv6-address
[ vpn-instance
vpn-instance-name ]
By default, no mapping between
a host name and an IPv6 address
is configured.
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.