User manual

Overview
12-8
12.1.6 ddns
DHCP Config Commands
Use this command to configure dynamic DNS parameters like domain name, enabling multi-user class and IP
address of the server.
Syntax
ddns [domainname (name)|multiple-user-class|server (IP address) (IP address)|
ttl <1-864000>|update-all]
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 the
DHCP packets between DHCP server available on the switch and DNS server.
Example
RFS7000(config-dhcp)#ddns domainname TestDomain.com
RFS7000(config-dhcp)#
RFS7000(config-dhcp)#ddns multiple-user-class
RFS7000(config-dhcp)#
RFS7000(config-dhcp)#ddns ttl 1000
RFS7000(config-dhcp)#
RFS7000(config-dhcp)#ddns update-all
RFS7000(config-dhcp)#
domainname (name) Sets domain name used for DDNS updates.
multiple-user-class Enables multiple user class option.
server (IP address)
(IP address)
Specifiies the server to which DDNS updates have been sent.
• ip address – IP address in dotted decimal format.
• ip address – IP address in dotted decimal format.
ttl <1-864000> Configures time to live (TTL) value used for DDNS updates.
• <1-864000> – TTL value in seconds
update-all Sends manual DDNS updates for all valid DHCP leases.