Dynamic Host Configuration Protocol (DHCP)
IntroductionThe Dynamic Host Configuration Protocol (DHCP) is a standardized network used on Internet.
Clients should require no manual configuration by the user to connect to the network.
This is normally accomplished through the use of a Dynamic Host Configuration Protocol
Introduction (Cont)
Requires little or no administrative overhead, after initial configurations of the DHCP server.
Addresses can be leased for a predefined amount of time before the lease expires and must be renewed by the client.
DHCP Configuration
Steps to Configure Easy IPConfigure a named DHCP poolConfigure network/subnet mask poolConfigure the default gatewayConfigure addresses to exclude from the DHCP address pool
DHCP Configuration
DHCP Pool
Router(config)#ip dhcp pool name
Pool Of Addresses
Router(dhcp-config)#network net_address subnet_mask
DHCP Configuration
The Default Gateway
Excluded Addresses
Router(dhcp-config)#default-router ip_address
Router(config)#ip dhcp excluded-address address_1 [address_n]
Example DHCP Configuration
RTA(config)#ip dhcp excluded-address 10.1.1.1
RTA(config)#ip dhcp pool RTA_LAN
RTA(dhcp-config)#network 10.1.1.0 255.255.255.0
RTA(dhcp-config)#default-router 10.1.1.1
A range of IP addresses that span several Subnets.
The DHCP server can assign these addresses to clients that are on several subnets.
A superscope is an administrative feature of DHCP servers that you can create and manage through the DHCP console.
Super-scope
Multicast scope
A range of class D addresses from 224.0.0.0 to 239.255.255.255 . only one copy of the message.
(MADCAP) is used to request a multicast address from a DHCP server.
DHCP Scope Properties
Network IDSubnet maskNetwork IP address rangeLease durationRouterScope nameExclusion range