DNS/DHCP Management Console

Linux DHCP Property Pages

The following table gives more information on DHCP (OES) objects:

Objects Description
Service The Service object acts as a container object for subnet, shared network, host, zone, class and TSIG key.
Server

The Dynamic Host Configuration Protocol (DHCP) uses the client/server structure to allocate network addresses to a host.
The DHCP server reads its configuration information from eDirectory and stores the information in its cache.

Shared Network All subnets that share the same physical network can be grouped under a Shared Network object.
Subnet

The Subnet object is the most fundamental DHCP object. It enables you to distribute IP addresses and DHCP options to each network. The Subnet object acts as a container object for Host and Pool objects.
A Subnet object's specific DHCP options and configuration parameters apply to the entire subnet and override global options.

Pool

The Pool object represents a range of addresses for dynamic address assignment or for exclusion from the address assignment.

Lease A DHCP-enabled client obtains a lease for an IP address from a DHCP server. Before the lease expires, the DHCP server must renew the lease for the client or the client must obtain a new lease.
Host

The Host object represents a client in the network with statically assigned IP address and is identified by a hostname.
You must use the DHCP Management utility to configure host objects that are manually assigned. For dynamically or automatically assigned client addresses, DHCP updates the information in the lease file.
When configuring an individual host object, you can provide specific options that override global options or those set at the subnet/service level.

Class The Class object helps in segregating clients into classes. These clients are treated differently depending on the class they are in.
Zone

A zone is a database that contains domain names and subdomain information for a specified domain. The specified DNS zone is updated of any change to the DHCP server.
DHCP server uses this information to perform dynamic updates for the zone objects. A DNS server must be configured to allow updates for the zone that the DHCP server will be updating.

TSIG Key TSIG Key provides a means of authenticating updates to a Dynamic DNS database. TSIG Key uses shared secret keys as a cryptographically secure means of authenticating a DNS update.
Failover Peer

Failover Peer defines methods for two servers to share common address pools and ensure continuous availability.
It defines a role of the Primary Server and the Secondary Server in event of system failure. During a prolonged failure of the Primary Server, the Secondary Server recovers all the addresses that the Primary Server had available for allocation, and begins to reuse them.

 


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