Important Ddns Configurations - Motorola WS5100 Series Migration Giude

2. Map the pool to a network.
WS5100(config-dhcp)#network 192.168.0.0/24
3. Add the address range to the DHCP network pool.
WS5100(config-dhcp)#address range 192.168.0.30 192.168.0.60
4. Enable the DDNS Server update.
WS5100(config-dhcp)#update dns override
update dns override
to which it issues IP address.
5. Configure the DDNS Server.
WS5100(config-dhcp)#ddns server 192.168.0.1
The command DDNS server 192.168.0.1 indicates the DDNS updates will be sent to 192.168.0.1.
Therefore, 192.168.0.1 should have an DNS server which accepts dynamic updates as per RFC 2136.
6. Configure the forward zone of the DNS Server.
WS5100(config-dhcp)#ddns domainname example.com
The command ddns domainname example.com indicates that the domain-name/forward-zone name used
for DDNS update is example.com.
If ddns domain name is not configured then the domain-name configured using
used for DDNS updates.
In the above example, the DNS name that will sent for DDNS update will be
address>.example.com
is the user-class sent by DHCP client. If user-class is not sent by client then the dns name will be
class>
<mac-address>.example.com
7. Exit from the DHCP instance.
WS5100(config-dhcp)#exit
You can also configure DNS in global configuration context. In the above example replace
192.168.0.1 used
global context.
The above example, when configured under global configuration context will look as follows:
WS5100(config)#ip name-server 192.168.0.1
WS5100(config)#ip dhcp pool test
WS5100(config-dhcp)#network 192.168.0.0/24
WS5100(config-dhcp)#address range 192.168.0.30 192.168.0.60
WS5100(config-dhcp)#update dns override
WS5100(config-dhcp)#ddns domainname example.com
WS5100(config-dhcp)#exit

7.3.1.1 Important DDNS Configurations

1. Use
update dns
DDNS updates for the IP that is receives from DHCP Server. This indicates DHCP Server that it should not
perform any DDNS updates for the clients to which it issues IP address.
2. A DDNS domain-name is not configured, DDNS updates will be sent using the domain name configured
for that L3 interface using
indicates that the DDNS updates will be sent by DHCP Server for the clients
where
<mac-address>
in the pool context with
to enable DDNS updates by clients. The DHCP client is itself is responsible for sending
domain-name <example.com
is the MAC address of the DHCP client and
ip name-server 192.168.0.1
>, which is part of the DHCP pool context.
7-3
Dynamic DNS
CLI will be
domain-name
<user-class>-<mac-
<user-
ddns server
to configure DNS under