Configuring Ddns Using The Cli; Creating Pool With Ddns Updates Enabled - Motorola WS5100 Series Migration Giude

7-2 WS5100 Series Switch Migration Guide
for a given name. Dynamic DNS is a service, which updates the DNS database to reflect the correct mapping
of a given name to an IP address in the scenario of non-static (dynamic) IP addresses for domain-names.
DHCP Server version 3.0.3 and later support dynamic assignment of IP addresses. This DHCP server has
support for DDNS functionality. The DHCP server will be configured to use the vendor class-id, client MAC
address received in the DHCP request message and the forward zone (same as domain name) for the given
interface to derive the fully qualified name for the DHCP client. The DHCP server will use the fully qualified
domain name constructed in this way to send the DNS update message. This dynamic DNS request will be
sent to DNS server on receiving the DHCP request message from the DHCP client.
DHCP server will also issue dynamic DNS update request to the configured DNS server on receiving a DHCP
release request from the DHCP client
A DHCP configuration daemon will be developed which will modify the configuration file of DHCP Server
when requested by IMI daemon. Integrated Management Interface (IMI) is the command line interface given
to the user to configure the switch. The IMI communicates the DHCP/DDNS requests to the DHCP
Configuration daemon. The DHCP configuration daemon restarts the DHCP Server after modifying the DHCP
Server configuration file for the changes to come into effect.

7.3 Configuring DDNS using the CLI

DDNS updates are sent by onboard DHCP Server for the clients to which it issues IP Address. TheOnboard
DHCP Server should be configured before configuring DDNS. Refer to Chapter 6.3, Configuring DHCP Server
using the CLI to configure onboard DHCP server.

7.3.1 Creating Pool with DDNS Updates Enabled

DDNS updates are configured on a per pool basis. Follow the steps provided in the example below to create
a pool with DDNS updates enabled.
1. Create a DHCP network pool —"test".
WS5100(config)#ip dhcp pool test