Enabling The Interface Address Pool Mode On Interface - H3C S5600 SERIES Operation Manual

Note:
When an S5600 Ethernet switch works in the interface address pool mode as a DHCP server, the only
gateway address it can assign to a client is the primary IP address of the interface.
Enabling the Interface Address Pool Mode on Interface(s)
If the DHCP server works in the interface address pool mode, it picks IP addresses from the interface
address pools and assigns them to the DHCP clients. If there is no available IP address in the interface
address pools, the DHCP server picks IP addresses from its global address pool that contains the
interface address pool segment and assigns them to the DHCP clients.
Follow these steps to configure interface address pool mode on interface(s):
To do...
Enter system view
Configure interface
address pool mode
You need to configure an IP address for the interface before enabling the interface address pool mode
on it.
To improve security and avoid malicious attack to the unused sockets, S5600 Ethernet switches
provide the following functions:
UDP port 67 and UDP port 68 ports used by DHCP are enabled only when DHCP is enabled.
UDP port 67 and UDP port 68 ports are disabled when DHCP is disabled.
The corresponding implementation is as follows:
After a DHCP interface address pool is created by executing the dhcp select interface command,
UDP port 67 and UDP port 68 ports used by DHCP are enabled.
After a DHCP interface address pool is deleted by executing the undo dhcp select interface
command and all other DHCP functions are disabled, UDP port 67 and UDP port 68 ports used by
DHCP are disabled accordingly.
system-view
interface interface-type
interface-number
On the current
interface dhcp select interface
quit
dhcp select interface
On multiple { interface interface-type
interfaces in interface-number [ to
system view interface-type interface-number ]
| all }
2-17
Use the command... Remarks
—
Required
By default, a DHCP
server assigns the IP
addresses of the global
address pool to DHCP
clients.