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that the DHCP packets exchange can be completed between the DHCP client and server.
Switch can act as both a DHCP server and a DHCP relay. DHCP server supports not only
dynamic IP address assignment, but also manual IP address binding (i.e. specify a specific IP
address to a specified MAC address or specified device ID over a long period. The differences
and relations between dynamic IP address allocation and manual IP address binding are: 1) IP
address obtained dynamically can be different every time; manually bound IP address will be
the same all the time. 2) The lease period of IP address obtained dynamically is the same as
the lease period of the address pool, and is limited; the lease of manually bound IP address is
theoretically endless. 3) Dynamically allocated address cannot be bound manually. 4) Dynamic
DHCP address pool can inherit the network configuration parameters of the dynamic DHCP
address pool of the related segment.
27.2 DHCP Server Configuration
DHCP Sever Configuration Task List:
Enable/Disable DHCP service
Configure DHCP Address pool
Create/Delete DHCP Address pool
Configure DHCP address pool parameters
Configure manual DHCP address pool parameters
Enable logging for address conflicts
1. Enable/Disable DHCP service
service dhcp
no service dhcp
Enable DHCP server. The no command
disables DHCP server.
ip dhcp disbale
no ip dhcp disable
The port disables DHCP services, the no
command enables DHCP services.
2. Configure DHCP Address pool
(1) Create/Delete DHCP Address pool
ip dhcp pool <name>
no ip dhcp pool <name>
Configure DHCP Address pool. The no
operation cancels the DHCP Address pool.
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