H3C S9500 Series Operation Manual page 200

Operation Manual – Network Protocol
H3C S9500 Series Routing Switches
In addition, you should make proper configuration to ensure that the DHCP relay and
the DHCP server devices are reachable to each other.
For detailed configurations, refer to
5.2.2 Enabling Option 82 Support on DHCP Relay
The configurations here can only be performed on the network devices where the
DHCP relay function is enabled.
Table 5-1 Enable Option 82 support on DHCP relay
Operation
Enter system view
Enable Option 82
support on DHCP
relay
Configure
strategy
DHCP
process the request
packets that carry
Option 82
5.3 Configuration Example
5.3.1 Option 82 Support on DHCP Relay Configuration Example
I. Network requirements
Two DHCP clients are on 10.110.0.0, and they acquire IP addresses from the DHCP
server through a DHCP relay device. The DHCP relay function is enabled on a VLAN
interface of the switch serving as the DHCP relay. Option 82 support is enabled on the
DHCP relay.
Command
system-view
dhcp relay information
enable
the
for the
dhcp relay information
relay to
strategy { drop | keep |
replace }
Chapter 5 DHCP Option 82 Configuration
C hapter 4 " D HCP Configuration" of this manual.
2 0 3 H 2 0 4 H
-
Required
Optional
By default, the DHCP relay adopts
the strategy replace to process the
request packets that carry Option
82. That is, the DHCP relay
replaces the original Option 82 in
the packets with its own Option 82.
5-2
Remarks