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Operation Manual – DHCP

H3C S3600 Series Ethernet Switches-Release 1510 Chapter 2

DHCP Server Configuration

2-31

 Note:

Executing the save command will not save the lease information on a DHCP server to

the flash memory. Therefore, the configuration file contains no lease information after

the DHCP server restarts or you clear the lease information by executing the reset

dhcp server ip-in-use command. In this case, any lease-update requests will be

denied, and the clients must apply for IP addresses again.

2.8 DHCP Server Configuration Example

Currently, DHCP networking can be implemented in two ways. One is to deploy the

DHCP server and DHCP clients in the same network segment. This enables the clients

to communicate with the server directly. The other is to deploy the DHCP server and

DHCP clients in different network segments. In this case, IP address assigning is

carried out through DHCP relay. Note that DHCP server configuration is the same in

both scenarios.

I. Network requirements

The DHCP server assigns IP addresses dynamically to the DHCP clients on the same

network segment. The network segment 10.1.1.0/24, to which the IP addresses of the

address pool belong, is divided into two sub-network segment: 10.1.1.0/25 and

10.1.1.128/25. The switch operating as the DHCP server holds two VLANs, whose

interface IP addresses are 10.1.1.1/25 and 10.1.1.129/25 respectively.

The DHCP settings of the 10.1.1.0/25 network segment are as follows:

z Lease time: 10 days plus 12 hours

z Domain name: aabbcc.com

z DNS server: 10.1.1.2

z WINS server: none

z Gateway: 10.1.1.126

The DHCP settings of the 10.1.1.128/25 network segment are as follows:

z Lease time: 5 days

z Domain name: aabbcc.com

z DNS server: 10.1.1.2

z WINS server: 10.1.1.4

z Gateway: 10.1.1.254

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