Correlating A Dhcp Server Group With A Relay Agent Interface - HP A7500 Series Configuration Manual

To do...
Enable the DHCP relay agent on
the current interface
NOTE:
The IP address pool containing the IP address of the DHCP relay agent enabled interface must be
configured on the DHCP server. Otherwise, the DHCP clients connected to the relay agent cannot obtain
correct IP addresses.
Correlating a DHCP server group with a relay
agent interface
To improve reliability, you can specify several DHCP servers as a group on the DHCP relay agent and
correlate a relay agent interface with the server group. When the interface receives request messages
from clients, the relay agent will forward them to all the DHCP servers of the group.
Configuration guidelines
Follow these guidelines when you correlate a DHCP server group with a relay agent interface:
You can specify up to twenty DHCP server groups on the relay agent.
•
• By executing the dhcp relay server-group command repeatedly, you can specify up to eight DHCP
server addresses for each DHCP server group.
The IP addresses of DHCP servers and those of relay agent's interfaces that connect DHCP clients
•
cannot be on the same subnet. Otherwise, the client cannot obtain an IP address.
A DHCP server group can correlate with one or multiple DHCP relay agent interfaces, while a relay
•
agent interface can only correlate with one DHCP server group. Using the dhcp relay server-select
command repeatedly overwrites the previous configuration. However, if the specified DHCP server
group does not exist, the interface still uses the previous correlation.
• The group-id argument in the dhcp relay server-select command is configured by using the dhcp
relay server-group command.
Configuration procedure
Follow these steps to correlate a DHCP server group with a relay agent interface:
To do...
Enter system view
Create a DHCP server group and
add a server into the group
Enter interface view
Correlate the DHCP server group
with the current interface
Use the command...
dhcp select relay
Use the command...
system-view
dhcp relay server-group group-id ip
ip-address
interface interface-type
interface-number
dhcp relay server-select group-id
58
Remarks
Required
With DHCP enabled, interfaces
work in the DHCP server mode.
Remarks
—
Required
Not created by default.
—
Required
By default, no interface is
correlated with any DHCP
server group.