H3C Technologies H3C S5560 Series Switches - Manual (Page 107)

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Step Command Remarks
1. Enter system view. system-view N/A
2. Specify the DNS trusted
interface.
dns trust-interface interface-type
interface-number
By default, no DNS trusted
interface is specified.
You can configure up to 128 DNS
trusted interfaces.
Setting the DSCP value for outgoing DNS packets
The DSCP value of a packet specifies the priority level of the packet and affects the transmission priority
of the packet. A bigger DSCP value represents a higher priority.
To specify the DSCP value for outgoing DNS packets:
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 ]