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Command: debug ip dhcp server { events|linkage|packets }
no debug ip dhcp server { events|linkage|packets }
Function: Enable DHCP server debug information: the “no debug ip dhcp server
{ events|linkage|packets }” command disables the debug information for
DHCP server.
Default: Debug information is disabled by default.
Command mode: Admin Mode
11.5.2 DHCP Troubleshooting Help
If the DHCP clients cannot obtain IP addresses and other network parameters, the
following procedures can be followed when DHCP client hardware and cables have been
verified ok.
& 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, (This
does not indicate ES4626/ES4650 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.
11.6 WEB Management
Click DHCP configuration. Users can configure DHCP on the switch.
11.6.1 DHCP server configuration
Click DHCP configuration, DHCP server configuration, The DHCP server
configuration page is shown.