H3C Technologies H3C S3100 Series Switches - Manual (Page 505)

2-4
To do… Use the command… Remarks
Enter system view system-view —
Enable DHCP dhcp enable
Optional
By default, DHCP is enabled.
To improve security and avoid malicious attacks to unused sockets, S3100 Ethernet switches provide
the following functions:
z UDP port 67 and UDP port 68 ports used by DHCP are enabled only when DHCP is enabled.
z UDP port 67 and UDP port 68 ports are disabled when DHCP is disabled.
The corresponding implementation is as follows:
z After DHCP is enabled with the dhcp enable command, if the DHCP server function is not
configured, UDP port 67 and UDP port 68 ports are kept disabled; if the DHCP server function is
configured, UDP port 67 and UDP port 68 ports are enabled.
z After DHCP is disabled with the undo dhcp enable command, even if the DHCP server function is
configured, UDP port 67 and UDP port 68 ports will be disabled.
Configuring the Global Address Pool Based DHCP Server
Configuration Task List
Complete the following tasks to configure the global address pool based DHCP server:
Task Remarks
Enabling the Global Address Pool Mode on Interface(s) Required
Creating a DHCP Global Address Pool Required
Configuring the static IP address allocation
mode
Configuring an
Address Allocation
Mode for the Global
Address Pool
Configuring the dynamic IP address allocation
mode
One of the two options is
required
Only one mode can be
selected for the same
global address pool.
Configuring a Domain Name Suffix for the DHCP Client Optional
Configuring DNS Servers for the DHCP Client Optional
Configuring WINS Servers for the DHCP Client Optional
Configuring Gateways for the DHCP Client Optional
Configuring BIMS Server Information for the DHCP Client Optional
Configuring Option 184 Parameters for the Client with Voice Service Optional
Configuring a Self-Defined DHCP Option Optional