Correlating A Dhcp Server Group With A Relay Agent Interface - 3Com 4500 PWR 26-Port Configuration Manual

Follow these steps to e
To do...
Enter system view
Enable DHCP

Correlating a DHCP Server Group with a Relay Agent Interface

To enhan ce reliability, you can set multiple DHCP servers on the same network. These DHCP servers
form a DHCP server group. When an interface of the relay agent establishes a correlation with the
DHCP server group, the interface will forward received DHCP packets to all servers in the server group.
Follow these steps to correlate a DHCP server group with a relay agent interface:
To do...
E ter system view n
C nfigure the DHCP server IP o
a dress(es) in a specified d
DH CP server group
Ma p an interface to a DHCP
ser ver group
To improve security and avoid malicious attack to the unused SOCKETs, S4500 Ethernet switches
provide the following functions:
UDP 67 and UDP 68 ports used by DHCP
UDP 67 and UDP 68 ports are disabled when DHCP is disabled.
The corresponding imp
When a VLAN interface is mapped to a DHCP server group with the dhcp-server command, the
DHCP relay agent is enabled. At the same time, UDP 67 and UDP 68 ports used by DHCP are
enabled.
When the mapping between a VLAN interface and a DHCP server group is removed with the undo
dhcp-server command, DHCP services are disabled. At the same time, UDP 67 and UDP 68
ports are disabled.
nable DHCP:
Use the command...
system-view
dhcp enable
Use the command...
system-view
dhcp-server groupNo ip
ip-address&<1-8>
interface interface-type
interface-number
dhcp-server groupNo
lementation is as follows:
40-5
—
Required
Enabled b
—
Required
By default, no DHCP server IP
address is configured in a
DHCP server group.
Required
By default, a VLAN interface is
not mapped to any DHCP
server group.
are enabled only when DHCP is enabled.
Remarks
y default.
Remarks