Dhcp Client Configuration Example - H3C S3100-52P Operation Manual

Operation Manual – DHCP
H3C S3100-52P Ethernet Switch
Note:
Currently, an S3100-52P Ethernet switch functioning as the DHCP client can use an IP
address for 24 days at most. That is, the DHCP client can obtain an address lease for
no more than 24 days even though the DHCP server offers a longer lease period.
Note:
To improve security and avoid malicious attack to the unused SOCKETs, S3100-52P
Ethernet switches provide the following functions:
UDP 67 and UDP 68 ports used by DHCP are enabled only when DHCP is enabled.
UDP 67 and UDP 68 ports are disabled when DHCP is disabled.
The specific implementation is:
Using the ip address dhcp-alloc command enables the DHCP client, and UDP
port 68.
Using the undo ip address dhcp-alloc command disables the DHCP client, and
UDP port 68.

4.4.1 DHCP Client Configuration Example

I. Network requirements
Using DHCP, VLAN-interface 1 of Switch A is connected to the LAN to obtain an IP
address from the DHCP server.
II. Network diagram
Figure 4-2 A DHCP network
Chapter 4 DHCP/BOOTP Client Configuration
4-5