Cisco Systems UBR900 Show dhcp Show dhcp lease Field Descriptions, UBR924# show dhcp server

show dhcp

Table 14	show dhcp lease Field Descriptions
Field		Description
Temp IP addr		IP address leased from the DHCP server for the cable access router interface.
Temp subnet mask		Temporary subnet mask assigned to the cable access router 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 access router interface). Possible states are Bound,
		Renew, or Rebinding. For descriptions of these states, see RFC 2131.
DHCP transaction id		Unique number established by the Cisco uBR900 series 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.
Renewal		Time interval (in seconds) from address assignment until the client transitions to the
		renewing state. When the renewal (T1) time expires, the client sends a unicast
		dhcprequest message to the server to extends its lease. The default value of this timer is
		0.5 times the duration of the lease.
Rebind		Time interval (in seconds) from address assignment until the client transitions to the
		rebinding state and sends a broadcast dhcprequest message to any DHCP server to
		extends its lease. The default value of this timer (T2) is 0.875 times the duration of the
		lease.
Temp default-gateway addr		IP address of the router closest to this client on the network.
Next timer fires after		Time in hours, minutes, and seconds until the next timer expires.
Retry count		Number of times the client has sent any message to the DHCP server -- most likely a
		request message to extend its lease. When the lease is renewed, the Retry count is reset
		to 0.
Client-ID		MAC address (with optional media type code) that uniquely identifies the client on the
		subnet for binding lookups.

Following is sample output for the show dhcp server command:

uBR924# show dhcp server
DHCP server: ANY (255.255.255.255)
Leases:	1
Offers:	1	Requests: 2	Acks:	1	Naks: 0
Declines: 0		Releases: 0	Bad:	0
TFTP Server Name: SOHOSERVER
TIME0: 1.2.0.250,		TIME1: 0.0.0.0
Subnet: 255.255.255.0

Table 15 describes the significant fields shown in the display.

Table 15	show dhcp server Field Descriptions
Field	Description
DHCP server	MAC address used by the DHCP server.
Leases	Number of current leased IP addresses.
Offers	Number of offers for an IP address sent to a proxy-client from the server.
Requests	Number of requests for an IP address to the server.

Configuring the Cisco uBR900 Series Cable Access Routers 109