User Manual
Dell Networking OS Behavior: DHCP is implemented in Dell Networking OS based on RFC 2131 and
3046.
Debugging DHCP Client Operation
To enable debug messages for DHCP client operation, enter the following debug commands:
• Enable the display of log messages for all DHCP packets sent and received on DHCP client interfaces.
EXEC Privilege
[no] debug ip dhcp client packets [interface type slot/port]
• Enable the display of log messages for the following events on DHCP client interfaces: IP address
acquisition, IP address release, Renewal of IP address and lease time, and Release of an IP address.
EXEC Privilege
[no] debug ip dhcp client events [interface type slot/port]
The following example shows the packet- and event-level debug messages displayed for the packet
transmissions and state transitions on a DHCP client interface.
DHCP Client: Debug Messages Logged during DHCP Client Enabling/Disabling
Dell (conf-if-Ma-0/0)# ip address dhcp
1w2d23h: %STKUNIT0-M:CP %DHCLIENT-5-DHCLIENT-LOG: DHCLIENT_DBG_EVT: Interface
Ma 0/0 :DHCP ENABLE
CMD
Received in state START
1w2d23h: %STKUNIT0-M:CP %DHCLIENT-5-DHCLIENT-LOG: DHCLIENT_DBG_EVT: Interface
Ma 0/0 :Transitioned
to state SELECTING
1w2d23h: %STKUNIT0-M:CP %DHCLIENT-5-DHCLIENT-LOG: DHCLIENT_DBG_PKT: DHCP
DISCOVER sent in
Interface
Ma 0/0
1w2d23h: %STKUNIT0-M:CP %DHCLIENT-5-DHCLIENT-LOG: DHCLIENT_DBG_PKT: Received
DHCPOFFER packet in
Interface Ma 0/0 with Lease-ip:10.16.134.250, Mask:255.255.0.0,Server-Id:
10.16.134.249
1w2d23h: %STKUNIT0-M:CP %DHCLIENT-5-DHCLIENT-LOG: DHCLIENT_DBG_EVT: Interface
Ma 0/0 :Transitioned
to state REQUESTING
1w2d23h: %STKUNIT0-M:CP %DHCLIENT-5-DHCLIENT-LOG: DHCLIENT_DBG_PKT:DHCP REQUEST
sent in Interface
Ma 0/0
1w2d23h: %STKUNIT0-M:CP %DHCLIENT-5-DHCLIENT-LOG: DHCLIENT_DBG_PKT:Received
DHCPACK packet in
Interface
Ma 0/0 with Lease-IP:10.16.134.250, Mask:255.255.0.0,DHCP REQUEST sent in
Interface Ma 0/0
1w2d23h: %STKUNIT0-M:CP %DHCLIENT-5-DHCLIENT-LOG: DHCLIENT_DBG_EVT: Interface
Ma 0/0 :Transitioned
to state BOUND
Dell(conf-if-ma-0/0)# no ip address
Dell(conf-if-ma-0/0)#1w2d23h: %STKUNIT0-M:CP %DHCLIENT-5-DHCLIENT-LOG:
DHCLIENT_DBG_EVT: Interface
Ma 0/0 :DHCP DISABLE CMD Received in state SELECTING
Dynamic Host Configuration Protocol (DHCP)
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