H3C Technologies H3C S5560 Series Switches - Manual (Page 128)

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# Set the DDNS update request interval to 12 minutes.
[Switch-ddns-policy-oray.cn] interval 0 0 12
[Switch-ddns-policy-oray.cn] quit
# Specify the IP address of the DNS server as 1.1.1.1.
[Switch] dns server 1.1.1.1
# Apply the DDNS policy oray.cn to VLAN-interface 2 to enable DDNS update and to dynamically
update the mapping between whatever.gicp.cn and the primary IP address of VLAN-interface 2.
[Switch] interface vlan-interface 2
[Switch-Vlan-interface2] ddns apply policy oray.cn fqdn whatever.gicp.cn
After the preceding configuration is completed, Switch notifies the DNS server of its new domain
name-to-IP address mapping through the PeanutHull server, whenever the IP address of Switch changes.
Therefore, Switch can always provide services at whatever.gicp.cn.