User manual

12-27
12.1.24 update
DHCP Config Commands
Use this command to control the usage of the DDNS service.
Syntax
update (dns)(override)
Parameters
Usage Guidelines
A DHCP client may not perform updates for RR’s A, TXT and PTR. Use update (dns) (override) to enable
the internal DHCP Server to send DDNS updates for resource records (RR’s) A, TXT and PTR. The DHCP Server
can always override the client, even if the client is configured to perform the updates.
In the network pool of DHCP Server, FQDN is configured as DDNS domain name. This is used internally in DHCP
packets between the switch’s DHCP Server and the DNS server.
Example
RFS7000(config-dhcp)#update dns override
RFS7000(config-dhcp)#
update (dns) (override) Controls the usage of the DDNS service.
• (dns) – Dynamic DNS Configuration.
• (override) – Enable Dynamic Updates by onboard DHCP Server.