Specifications

show dhcp
Bridging and Routing Features for the Cisco uBR904 Cable Modem 27
show dhcp
To display the current DHCP settings on point-to-point interfaces, enter the show dhcp command
from privileged EXEC mode.
show dhcp {lease | server}
Syntax Description
Command Mode
Privileged EXEC
Usage Guidelines
You can use this command on any point-to-point type of interface that uses DHCP for temporary IP
address allocation.
Examples
Following is sample output for the show dhcp lease command:
uBR904# show dhcp lease
Temp IP addr: 188.188.1.40 for peer on Interface: cable-modem0
Temp sub net mask: 0.0.0.0
DHCP Lease server: 4.0.0.32, state: 3 Bound
DHCP transaction id: 2431
Lease: 3600 secs, Renewal: 1800 secs, Rebind: 3150 secs
Temp default-gateway addr: 188.188.1.1
Next timer fires after: 00:58:01
Retry count: 0 Client-ID: 0010.7b43.aa01
Table 3 describes the significant fields shown in the display.
lease Show DHCP addresses leased from a server.
server Show known DHCP servers.
Table 2 Show DHCP Lease Field Descriptions
Field Description
Temp IP addr IP address leased from the DHCP server for the cable modem interface.
Temp subnet mask Temporary subnet mask assigned to the cable modem interface.
DHCP Lease server IP address of the DHCP server that assigned an IP address to this client.
state Current state of this client (the cable modem interface). Possible states are Bound,
Renew, or Rebinding. For descriptions of these states, see RFC 2131.
DHCP transaction id Unique number established by the uBR904 before the first request message is sent to
the DHCP server. The same transaction id is used as long as the lease keeps getting
renewed and is valid. If a new “discover” message is sent, a new transaction id is used.
Lease Time (in seconds) for which the leased IP address is valid; the duration of the lease.