Dynamic DNS (DDNS) is a method of frequently automatically updating a server name in the Domain Name System (DNS) with the active DNS hostname and address configuration. The active DNS hostname is the hostname that you configure using the NW TCPIP TCPIPHOSTNAME system command. If you did not configure a host name, the MCP hostname is used.
| Note: | For more information on the NW TCPIP TCPIPHOSTNAME system command, see Identifying a Local TCP/IP Host to the Network. |
The DNS update is applied to the first DNS server returned by the DHCP server using DHCP Option 6. If the DNS server cannot be reached, the active DNS hostname and address configuration are not updated, and the server is not retried.
To determine the state of an updated server name, check the records placed in the SUMLOG using Major Type 27 (TCP/IP), Minor Type 25 (DHCP).
The ClearPath MCP feature for DDNS provides:
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An interface property that can be specified with the ADD Identity command indicating if the interface should use DDNS.
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A global property that indicates the default value for DDNS for each interface, if not otherwise specified.
An interface is regulated by both the interface and global properties to determine if DDNS will be attempted. The value of the interface property overrides the value of the global property for that interface, which enables the network administrator to choose which interfaces will obtain a DNS address. For example, if an interface has a global DDNS property set to FALSE and its DDNS interface property is modified to enabled, the interface will perform DDNS handling.
