when i type ipconfig/all...i get everything basically...however at the very end there are two phrases ....one that says lease obtained...onother one is lease expires...what is all this???
2007-02-08 15:17:07 · 7 answers · asked by elbestionblog 1 in Computers & Internet ➔ Computer Networking
That's your DHCP lease. When you connect to a DHCP server and get an IP address, it's leased - the server tells you how long you can use that particular IP.
More details on DHCP are at http://en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol
2007-02-08 15:25:26 · answer #1 · answered by Rose D 7 · 1⤊ 0⤋
DHCP or Dynamic Host Configuration Protocol is a service for automatically assigning an IP address and other parameters (Subnet Mask, Default Gateway, DNS Servers, WINS Servers, etc.) to a host. A host is any network aware device on the network (computer, printer, switch, etc.). Any host configured for DHCP will attempt to secure a lease from a DHCP server when the network interface comes on-line during the boot process.
The Lease Obtained line is the Date/Time stamp of the DHCP lease.
The Lease Expires line is the Date/Time when the lease is due to expire.
At one half the interval between the two, the client will start to attempt to renew its DHCP lease. If the renewal is successful, the time stamps will update. If the renewal is unsuccessful, the host will continue to use the same IP address and will attempt to renew the lease at a predifined interval until it succeeds.
When a renewal is successful, the host may be assigned a new IP address or it may continue using the previous IP address that was assigned. This action depends upon the configuration of the DHCP server. It used to be common for DHCP servers to force a new IP address at each renewal but these changes consume valuable processing resources -- a change requires about 8x the amount of CPU time and network bandwidth as a continue does -- so most DHCP servers no longer force a change of IP address at each renewal, often even if the host has been restarted (rebooted or disconnected from the network and reconnected).
An infrequently used paramater is Maximum DHCP Lease Time. It is specified in seconds though it's usually displayed in hours when it is set. If this parameter is not set, the host will attempt to renew an IP address indefinitely but will stay on the network with its current IP address. If the parameter is set, the host will stop renewal attempts when the Max DHCP Lease Time is exceeded at which time network communication will fail.
2007-02-08 16:10:05 · answer #2 · answered by Bostonian In MO 7 · 0⤊ 0⤋
This is the DHCP "lease" on the IP address.
When you are using a Dynamic IP address, the computer requests the IP address from the server (or router). The server/router hands the computer an IP address and says "oh, by the way, I'm going to expire this IP address after ____ period of time, that way I can give it to someone else."
This is the "Lease".
The computer can "renew" the "lease". (ipconfig /renew) - but when that happens, the router/dhcp server can choose to give the computer a new IP instead. Frequently done to keep you from running a server on a dynamic connection. (The way around this is dynamic dns - but that's another question, right? ;-) )
In summary - the lease is the length of time that your Dynamic IP granted to you by the DHCP Server will live. In practice - it's rarely something that you'll even need to think about.
2007-02-08 15:25:57 · answer #3 · answered by Adrenalynn 2 · 1⤊ 0⤋
Some providers give you a "lease" on the time that your machine will have the IP it currently has. IPConfig renews that lease once obtained, the DHCP server on the other end specifies when the lease is up "lease expires" They do that so that you have a dynamic rather than static IP.
2007-02-08 15:25:08 · answer #4 · answered by ? 5 · 0⤊ 1⤋
When your system starts the networking stack if you have not assigned static IP to it then it will broadcast on the network a request for an IP address. A DHCP server will answer that request and provide an IP that is good for a specified time, lease time. Anytime during that period your PC may request again, refresh, etc which can change that time.
Lease Obtained: Time IP was assigned
Lease Expires: When the IP will become invalid if your system does not broadcast again.
2007-02-08 16:13:34 · answer #5 · answered by MS_TechHelp 5 · 0⤊ 0⤋
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2016-05-23 23:44:48 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Ipconfig All
2016-09-28 11:54:58 · answer #7 · answered by ? 4 · 0⤊ 0⤋