Linux network-based route DHCP configuration

DHCP transmission principle: 1: the client uses physical broadcast FF: FF and IP

DHCP transmission principle:

1: the client uses the physical broadcast FF: FF and IP broadcast bandwidth 255.255.255.255.2255

2: When the DNS router receives a broadcast packet, it uses the same physical broadcast and IP broadcast to respond. The data frame contains the allocated address information.

3: the client receives a data frame containing the allocated address information and uses physical broadcast and IP broadcast to respond again. Accept the address information to all other hosts.

4: The DNS router receives a response from the client. broadcasting again indicates confirming the client address and declaring all other hosts from which the client is allocated dynamically.

Router DHCP configuration steps

1: enter configure terminal mode, service dhcp (start dhcp service)

2: ip dhcp pool pool_name (determine the network pool to be dynamically allocated)

3: network A. B .C.D net_mask (network segment allocated by the dynamic host)

4: default_gatway A. B .C.D (configure the allocated gateway address)

5: dns_server A. B .C.D (configure the allocated DNS)

Relay DHCP service router configuration

1: enable the relay mode on the port for DHCP service on the relay router.

2: Enter ip helper_address A. B .C.D (the ip address here is the ip address of the DHCP router)

3: configure the dynamic allocation pool according to the DHCP configuration steps.