Switch Management Commands 1894DHCP Server CommandsDell EMC Networking N2000/N2100/N3000/N3100/N4000 SeriesSwitchesDHCP is based on the Bootstrap Protocol (BOOTP). It also captures thebehavior of BOOTP relay agents and DHCP participants can inter operatewith BOOTP participants.The host RFC’s standardize the configuration parameters which can besupplied by the DHCP server to the client. After obtaining parameters viaDHCP, a DHCP client should be able to exchange packets with any other hostin the Internet. DHCP is based on a client-server model.DHCP consists of the following components:• A protocol for delivering host-specific configuration parameters from aDHCP server to a host.• A mechanism for allocation of network addresses to hosts.DHCP offers the following features and benefits:• It supports the definition of “pools” of IP addresses that can be allocatedto clients by the server. Many implementations use the term scope insteadof pool.• Configuration settings like the subnet mask, default router, DNS server,that are required to make TCP/ IP work correctly can be passed to theclient using DHCP.• DHCP is supported by most TCP/ IP routers this allows it to allocate an IPaddress according to the subnet the original request came from. Thismeans that a single DHCP server can be used in multiple subnets and thatthere is no need to reconfigure a client that changed subnets.• Addresses can be leased out for a specific duration after which they need tobe explicitly renewed. This allows DHCP to reclaim expired addresses andput them back into the unallocated pool.• Internet access cost is greatly reduced by using automatic assignment asStatic IP addresses are considerably more expensive to purchase than areautomatically allocated IP addresses.
