H3C S7500 Series Ethernet Switches Operation Manual

Operation Manual – DHCP
H3C S7500 Series Ethernet Switches Chapter 2
DHCP Server Configuration
2-12
 Note:
z The IP addresses statically bound in interface address pools and the interface IP
addresses must be in the same segment.
z There is no limit to the number of IP addresses statically bound in an interface
address pool, but the IP addresses statically bound in interface address pools and
the interface IP addresses must be in the same segment.
z An IP address can be statically bound to only one MAC address. A MAC address
can be bound with only one IP address statically.
z The IP address to be statically bound cannot be an interface IP address of the
DHCP server; otherwise the static binding does not take effect.
II. Configuring to assign IP addresses dynamically
As an interface-based address pool is created after the interface is assigned a valid
unicast IP address, the IP addresses contained in the address pool belong to the
network segment where the interface resides and are available to the interface only.
So specifying the range of the IP addresses to be dynamically assigned is
unnecessary.
To avoid IP address conflicts, the IP addresses to be dynamically assigned to DHCP
clients are those not occupied by specific network devices (such as gateways and
FTP servers).
The lease time can differ with address pools. But that of the IP addresses of the same
address pool is the same. Lease time is not inherited, that is to say, the lease time of a
child address pool is not affected by the configuration of the parent address pool.
Follow these steps to configure to assign IP addresses dynamically:
To do… Use the command… Remarks
Enter system view
system-view
—
interface interface-type
interface-number
dhcp server expired { day day
[ hour hour [ minute minute ] ] |
unlimited }
Configure
for the
current
interface
quit
Configure
the lease
time
Configure
multiple
interfaces
in system
view
dhcp server expired { day day
[ hour hour [ minute minute ] ] |
unlimited } { interface
interface-type interface-number [ to
interface-type interface-number ] |
all }
Optional
The default lease
time is one day