3Com 5500 SI - Switch - Stackable, Configuration Manual

Page: 150 / 686

150 C
HAPTER
11: DHCP R
ELAY
C
ONFIGURATION
5 Configure an IP address for VLAN 2 interface, so that this interface is on the same
network segment with the DHCP clients.)
[S5500-Vlan-interface2] ip address 10.110.1.1 255.255.0.0
You need to perform corresponding configurations on the DHCP server to enable the
DHCP clients to obtain IP addresses from the DHCP server. The DHCP server
configurations differ depending on different DHCP server devices and are thus
omitted.
Troubleshooting DHCP
Relay
Symptom
A client fails to obtain configuration information through a DHCP relay.
Analyse
This problem may be caused by improper DHCP relay configuration. When a DHCP
relay operates improperly, you can locate the problem by enabling debugging and
checking the information about debugging and interface state (You can display the
information by executing the corresponding display command.)
Solution
■
Check if an address pool that is on the same network segment with the DHCP
clients is configured on the DHCP server.
■
Check if a reachable route is configured between the DHCP relay and the DHCP
server.
■
Check if the DHCP relay has proper relay IP addresses configured on the VLAN
interface to which the network segment containing the DHCP clients is connected,
and if the configured relay IP addresses conflict.