Dhcp-Server - Huawei Quidway S3900 series Command Manual

New Feature Manual - DHCP
Quidway S3900 Series Ethernet Switches-Release 1510
Example
# Enter system view.
<Quidway> system-view
System View: return to User View with Ctrl+Z.
# Set the interval to update dynamic address entries to 60 seconds.
[Quidway] dhcp-security tracker 60

2.1.7 dhcp-server

Syntax
dhcp-server groupNo
undo dhcp-server
View
VLAN interface view
Parameter
groupNo: DHCP server group number. This argument ranges from 0 to 19.
Description
Use the dhcp-server command to map the current VLAN interface to a DHCP server
group.
Use the undo dhcp-server command to cancel the mapping.
Related command: dhcp-server ip, display dhcp-server, and display dhcp-server
interface vlan-interface.
Note:
To prevent malicious attacks to unused sockets and enhance security, S3900 series
Ethernet switches provide the following functions:
When DHCP is enabled, sockets UDP 67 and UDP 68 used by DHCP are enabled.
When DHCP is disabled, sockets UDP 67 and UDP 68 are disabled at the same
time.
The preceding functions are implemented as follows:
After you configure a DHCP server group by using the dhcp-server command,
sockets UDP 67 and UDP 68 will be enabled.
After you delete the DHCP server group by using the undo dhcp-server command
and disable all the DHCP functions, sockets UDP 67 and UDP 68 will be disabled.
Huawei Technologies Proprietary
2-6
Chapter 2 DHCP Relay Configuration C
ommands