Troubleshooting Dhcp Relay Agent Configuration - H3C S3610-28P Operation Manual

Operation Manual – DHCP
H3C S3610&S5510 Series Ethernet Switches
# Configure DHCP server group 1 with the DHCP server 10.1.1.1, and correlate the
DHCP server group 1 with VLAN-interface 1.
[SwitchA] dhcp relay server-group 1 ip 10.1.1.1
[SwitchA] interface vlan-interface 1
[SwitchA-Vlan-interface1] dhcp relay server-select 1
Note:
Performing the configuration on the DHCP server is also required to guarantee the
client-server communication via the relay agent. Refer to
Configuration Examples
If the DHCP relay agent and server are on different subnets, routes in between must
be reachable.

3.6 Troubleshooting DHCP Relay Agent Configuration

I. Symptom
DHCP clients cannot obtain any configuration parameters via the DHCP relay agent.
II. Analysis
Some problems may occur with the DHCP relay agent or server configuration. Enable
debugging and execute the display command on the DHCP relay agent to view the
debugging information and interface state information for locating the problem.
III. Solution
Check that:
The DHCP is enabled on the DHCP server and relay agent.
The address pool on the same subnet where DHCP clients reside is available on
the DHCP server.
The routes between the DHCP server and DHCP relay agent are reachable.
The relay agent interface connected to DHCP clients is correlated with correct
DHCP server group and IP addresses for the group members are correct.
Chapter 3 DHCP Relay Agent Configuration
for DHCP server configuration information.
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DHCP Server