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debug ip dhcp server
Cisco IOS DHCP Server 51
debug ip dhcp server
To enable Cisco IOS Dynamic Host Configuration Protocol (DHCP) Server debugging, use the
debug ip dhcp server privileged EXEC command. Use the no form of this command to disable
DHCP server debugging.
debug ip dhcp server {events | packets | linkage}
no debug ip dhcp server {events | packets | linkage}
Syntax Description
Defaults
DHCP server debugging is not enabled.
Usage Guidelines
This command first appeared in Cisco IOS Release 12.0(1)T.
Examples
The first example below shows a combination of DHCP server events and decoded receptions and
transmissions. The second example below shows database linkage information.
Router# debug ip dhcp server events
Router# debug ip dhcp server packets
DHCPD:DHCPDISCOVER received from client 0b07.1134.a029 through relay 10.1.0.253.
DHCPD:assigned IP address 10.1.0.3 to client 0b07.1134.a029.
DHCPD:Sending DHCPOFFER to client 0b07.1134.a029 (10.1.0.3).
DHCPD:unicasting BOOTREPLY for client 0b07.1134.a029 to relay 10.1.0.253.
DHCPD:DHCPREQUEST received from client 0b07.1134.a029.
DHCPD:Sending DHCPACK to client 0b07.1134.a029 (10.1.0.3).
DHCPD:unicasting BOOTREPLY for client 0b07.1134.a029 to relay 10.1.0.253.
DHCPD:checking for expired leases.
Router# debug ip dhcp server linkage
DHCPD:child pool:10.1.0.0 / 255.255.0.0 (subnet10.1)
DHCPD:parent pool:10.0.0.0 / 255.0.0.0 (net10)
DHCPD:child pool:10.0.0.0 / 255.0.0.0 (net10)
DHCPD:pool (net10) has no parent.
DHCPD:child pool:10.1.0.0 / 255.255.0.0 (subnet10.1)
DHCPD:parent pool:10.0.0.0 / 255.0.0.0 (net10)
DHCPD:child pool:10.0.0.0 / 255.0.0.0 (net10)
DHCPD:pool (net10) has no parent.
Related Commands
show ip dhcp bindings
show ip dhcp database
events Reports server events, like address assignments and database updates.
packets Decodes DHCP receptions and transmissions.
linkage Displays database linkage information (such as parent-child
relationships in a radix tree).