Updating

Updating procedure varies depending on whether the machine IP address is static or acquired by DHCP.

To update the record using the machine, the DNS server has to have one of the following:

No security settings are made.
If security settings are made, an IP-specified client (this machine) permits updating.

Dynamic update using message authentication (TSIG, SIG(0)) is not supported.

For a static IPv4 setting

If the IP address or host name is changed, the A and PTR records are updated. When you register the A record, you can also register the CNAME. CNAMEs that can be registered are as follows:

Ethernet
RNPXXXXXX (XXXXXX represents the last 3 hexadecimal bytes of the MAC address)
However, if CNAME (RNPXXXXXX) overlaps with the host name, CNAME will not be registered.

For DHCPv4 settings

As a substitute for the machine, the DHCP server updates the record, and one of the following occurs:

When the machine acquires the IP address from the DHCP server, the DHCP server updates the A and PTR records.
When the machine acquires the IP address from the DHCP server, the machine updates the A record, and the DHCP server updates the PTR record.

When you register the A record, you can also register the CNAME. CNAMEs that can be registered are as follows:

Ethernet
RNPXXXXXX (XXXXXX represents the last 3 hexadecimal bytes of the MAC address)

For IPv6 settings

This machine updates the AAAA record and PTR record.

It also updates CNAME when the AAAA record is updated.

When a stateless address is newly set, it is automatically registered on the DNS server also.

When the dynamic DNS function is not used, records managed by the DNS server must be updated manually, if the machine's IP address is changed.
CNAME registration is factory set to off. To enable it, use the telnet dns command. For details, see Remote Maintenance Using telnet.