90
Step Command Remarks
1. Enter system view.
system-view N/A
2. Specify the DSCP value
for outgoing DNS
packets.
• DSCP value for IPv4 DNS packets:
dns dscp dscp-value
• DSCP value for IPv6 DNS packets:
ipv6 dns dscp dscp-value
By default, the DSCP value for
outgoing DNS packets is 0.
The configuration is available on
DNS clients and DNS proxy
devices.
Displaying and maintaining IPv4 DNS
Execute display commands in any view and reset commands in user view.
Task Command
Display the domain name resolution
table.
display dns host [ ip | ipv6 ] [ vpn-instance vpn-instance-name ]
Display IPv4 DNS server information.
display dns server [ dynamic ] [ vpn-instance vpn-instance-name ]
Display IPv6 DNS server information.
display ipv6 dns server [ dynamic ] [ vpn-instance vpn-instance-name ]
Display DNS suffixes. display dns domain [ dynamic ] [ vpn-instance vpn-instance-name ]
Clear information about the dynamic
domain name cache.
reset dns host [ ip | ipv6 ] [ vpn-instance vpn-instance-name ]
IPv4 DNS configuration examples
Static domain name resolution configuration example
Network requirements
As shown in Figure 34, the device wants to access the host by using an easy-to-remember domain name
rather than an IP address.
Configure static domain name resolution on the device so that the device can use the domain name
host.com to access the host whose IP address is 10.1.1.2.
Figure 34 Network diagram
Configuration procedure
# Configure a mapping between host name host.com and IP address 10.1.1.2.
<Sysname> system-view
[Sysname] ip host host.com 10.1.1.2