Configuring an Internal DHCP Server DHCP Server Overview
OmniSwitch AOS Release 8 Network Configuration Guide December 2017 page 22-4
DHCP Server Overview
DHCP consists of two components:
• A protocol to supply client-specific configuration parameters from a DHCP server to a client.
• A mechanism to allocate network addresses to clients.
A DHCP server uses the Dynamic Host Configuration Protocol to provide initialization parameters to the
clients in the network.
The DHCP process
DHCP is built on a client-server model, where a designated DHCP server allocates network addresses and
delivers configuration parameters to dynamically configured client addresses.The process for a client to
obtain its IP address through a DHCP server is as follows:
1 The client generates a DHCP request message via UDP broadcast.
2 The server listens for this request message.
3 The server responds with a DHCP reply and a valid IP address.
4 The server responds with a dynamic address in a defined range or one based on a MAC address.
5 The server leases the address for a specific time period.
Internal DHCP Server on OmniSwitch
The OmniSwitch internal DHCP server provides the abilities to:
• Enable or disable the DHCP server.
• Dynamically modify the DHCP configuration, using the vi editor, or through an accurately configured
text file transferred to the switch.
• Restart the DHCP server.
• View the DHCP leases offered by the internal DHCP server.
• View the DHCP server statistics through the command line interface.
VitalQIP Server
The VitalQIP framework provides a complete solution for IP Address Management. The OmniSwitch runs
the relevant components for a remote server such as Message Service and Active Lease that interact with
the QIP server. The QIP server can be used to generate the required conf and pcy files which can used on
the OmniSwitch to allow it to act as a remote server.
OmniSwitch DHCP Server Management
The DHCP Server on the OmniSwitch is managed from VitalQIP by specifying the IP address of the
OmniSwitch through which the VitalQIP server can manage the OmniSwitch. This can be the Loopback0
or other IP interface that is reachable by the VitalQIP server.
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