DDNS configuration example with www.3322.org

Network requirements

As shown in Figure 51, the switch is a Web server with domain name whatever.3322.org and uses an IP address dynamically obtained through DHCP. To make sure the switch can always provide Web services at whatever.3322.org when its IP address changes, perform the following tasks on the switch:

Figure 51: Network diagram

Configuration procedure

Before configuring DDNS on the switch, perform the following tasks:

# Create a DDNS policy named 3322.org, and enter its view.

<Switch> system-view
[Switch] ddns policy 3322.org

# Specify the URL address, username, and password for DDNS update requests.

[Switch-ddns-policy-3322.org] url http://members.3322.org/dyndns/update?system=dyndns&hostname=<h>&myip=<a>
[Switch-ddns-policy-3322.org] username steven
[Switch-ddns-policy-3322.org] password simple nevets

# Set the interval to 15 minutes for sending DDNS update requests.

[Switch-ddns-policy-3322.org] interval 0 0 15
[Switch-ddns-policy-3322.org] quit

# Specify the IP address of the DNS server as 1.1.1.1.

[Switch] dns server 1.1.1.1

# Apply DDNS policy 3322.org to VLAN-interface 2 to enable DDNS update. The mapping between domain name whatever.3322.org and the primary IP address of VLAN-interface 2 will be dynamically updated.

[Switch] interface vlan-interface 2
[Switch-Vlan-interface2] ddns apply policy 3322.org fqdn whatever.3322.org