H3C Technologies H3C S5560 Series Switches - Manual (Page 103)

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Configuration guidelines
Follow these guidelines when you configure dynamic domain name resolution:
• You can specify DNS server IPv4 addresses as follows:
{
Specify DNS server IPv4 addresses for the public network and up to 1024 VPNs.
{
Specify a maximum of six DNS server IPv4 addresses for the public network or each VPN.
• You can specify DNS server IPv6 addresses as follows:
{
Specify DNS server IPv6 addresses for the public network and up to 1024 VPNs.
{
Specify a maximum of six DNS server IPv6 addresses for the public network or each VPN.
An IPv4 name query is first sent to the DNS server IPv4 addresses. If no reply is received, it is sent
to the DNS server IPv6 addresses.
• You can specify DNS suffixes as follows:
{
Specify DNS suffixes for the public network and up to 1024 VPNs.
{
Specify a maximum of 16 DNS suffixes for the public network or each VPN.
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 most recent
configuration for a host name takes effect.
• You can configure the following:
{
IPv6 DNS entries for the public network and up to 1024 VPNs.
{
A maximum of 1024 IPv6 DNS entries for the public network or each VPN.