H3C S3600 Series Operation Manual page 39

Operation Manual – DHCP
H3C S3600 Series Ethernet Switches-Release 1510
Note:
If you use the inheriting relation of parent and child address pools, make sure that the
number of the assigned IP addresses does not exceed the number of the IP addresses
in the child address pool; otherwise extra IP addresses will be obtained from the parent
address pool, and the attributes (for example, gateway) also are based on the
configuration of the parent address pool.
For example, in the network to which VLAN-interface1 is connected, if multiple clients
apply for IP addresses, the child address pool 10.1.1.0/25 assigns IP addresses first.
When the IP addresses in the child address pool have been assigned, if other clients
need IP addresses, the IP addresses will be assigned from the parent address pool
10.1.1.0/24 and the attributes will be based on the configuration of the parent address
pool.
For this example, the number of clients applying for IP addresses from
VLAN-interface1 is recommended to be less than or equal to 122 and the number of
clients applying for IP addresses from VLAN-interface2 is recommended to be less
than or equal to 124.
II. Network diagram
Switch A Switch A Switch A Switch A Switch A
Figure 2-2 Network diagram for DHCP configuration
III. Configuration procedure
1) Configure a VLAN and add a port in this VLAN, and then configure the IP address
of the VLAN interface (omitted).
2) Configure DHCP service.
# Enable DHCP.
<H3C> system-view
[H3C] dhcp enable
NetBIOS Server NetBIOS Server NetBIOS Server NetBIOS Server NetBIOS Server NetBIOS Server Client Client Client Client Client
VLAN-interface1 VLAN-interface1
10.1.1.1/25 10.1.1.1/25
LAN LAN LAN LAN LAN LAN
VLAN-interface1 VLAN-interface1
DNS Server DNS Server DNS Server DNS Server DNS Server Client Client Client Client Client
2-32
Chapter 2 DHCP Server Configuration
Client Client Client Client Client Client
VLAN-interface2 VLAN-interface2
10.1.1.129/25 10.1.1.129/25
LAN LAN LAN LAN LAN LAN
DHCP Server DHCP Server DHCP Server DHCP Server DHCP Server
Client Client Client Client Client
Cl Cl Cl Cl Cl ient ient ient ient ient
Switch B Switch B Switch B Switch B Switch B
Client Client Client Client Client