PLANET XGS3-24040 - Manual (Page 218)

Chapter 28 DHCP Configuration
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 Verify the DHCP server is running, start the related DHCP server if not running. If the DHCP clients and
servers are not in the same physical network, verify the router responsible for DHCP packet forwarding
has DHCP relay function. If DHCP relay is not available for the intermediate router, it is recommended
to replace the router or upgrade its software to one that has a DHCP relay function.
 In such case, DHCP server should be examined for an address pool that is in the same segment of the
switch VLAN, such a pool should be added if not present, and (This does not indicate switch cannot
assign IP address for different segments, see solution 2 for details.)
 In DHCP service, pools for dynamic IP allocation and manual binding are conflicting, i.e., if command
“network-address” and “host” are run for a pool, only one of them will take effect; furthermore, in
manual binding, only one IP-MAC binding can be configured in one pool. If multiple bindings are
required, multiple manual pools can be created and IP-MAC bindings set for each pool. New
configuration in the same pool overwrites the previous configuration.