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Zatrix

Member
Joined
Jun 14, 2004
Location
moving to ohio once 2012 gets closer
Im going on vacation in a few days and im wondering. if i leave my modem unplugged for a few days and when i come back and reconnect it again will i have a new ip? my ip is static thought BUT the lease is only for a few days at a clip so if i unplug it i should have a new ip by then?
 

Crash893

"The man in black fled across the desert,
Joined
Mar 13, 2001
1) if it canges its not static all dynamic are leased out for a few days at a time
2) if you leave it you should just the the same one again if your up
3) there is a utility that will report your ip address to a webserver and you can log into the said server with a username and password to find out what it is

what this utility is called i have no idea i saw it on techtv once start there

4) you could renew your ipaddress right before you leave and you should be fine
 

I.M.O.G.

Glorious Leader
Joined
Nov 12, 2002
Location
Rootstown, OH
ipconfig /release

ipconfig /renew

ipconfig /?

The last one explains what all the switches do Zatrix.. :) Like this:

Code:
Microsoft Windows XP [Version 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.

C:\>ipconfig /?

USAGE:
    ipconfig [/? | /all | /renew [adapter] | /release [adapter] |
              /flushdns | /displaydns | /registerdns |
              /showclassid adapter |
              /setclassid adapter [classid] ]

where
    adapter         Connection name
                   (wildcard characters * and ? allowed, see examples)

    Options:
       /?           Display this help message
       /all         Display full configuration information.
       /release     Release the IP address for the specified adapter.
       /renew       Renew the IP address for the specified adapter.
       /flushdns    Purges the DNS Resolver cache.
       /registerdns Refreshes all DHCP leases and re-registers DNS names
       /displaydns  Display the contents of the DNS Resolver Cache.
       /showclassid Displays all the dhcp class IDs allowed for adapter.
       /setclassid  Modifies the dhcp class id.

The default is to display only the IP address, subnet mask and
default gateway for each adapter bound to TCP/IP.

For Release and Renew, if no adapter name is specified, then the IP address
leases for all adapters bound to TCP/IP will be released or renewed.

For Setclassid, if no ClassId is specified, then the ClassId is removed.

Examples:
    > ipconfig                   ... Show information.
    > ipconfig /all              ... Show detailed information
    > ipconfig /renew            ... renew all adapters
    > ipconfig /renew EL*        ... renew any connection that has its
                                     name starting with EL
    > ipconfig /release *Con*    ... release all matching connections,
                                     eg. "Local Area Connection 1" or
                                         "Local Area Connection 2"

C:\>
 
Last edited:

Crash893

"The man in black fled across the desert,
Joined
Mar 13, 2001
ipconfig /all

is pretty usefull

it will tell you when your lease expires
 
OP
Zatrix

Zatrix

Member
Joined
Jun 14, 2004
Location
moving to ohio once 2012 gets closer
but i have static ip. my friend said i could only change the last 2 octlets of the adress. but i cant just renew it? just the last 2 octlets is hard work. you gotta renter all your stuff and stuff
 

SevenSixTwo

Member
Joined
Nov 13, 2002
Location
not here anymore thats for sure
Here's what I know from experience with home DSL/Cable Modems.
If you do not ask specifically you get a dynamic IP address which "can" change. "Can" in the sense you are not guaranteed that it will not ever change.

Now, the only real way to lose your IP, if you have "dynamic" service, is to unplug your modem for a while or have something happen on the ISP side, like maintenance where everyone is kicked off and then connected back, which is extremely rare.

Your computer does not wait for the lease to expire, then the instant it does renew it, and maybe even compete with someone else for it. It actually renews the lease before it expires, hence why most people who keep their modems on all the time can have the same IP for months, if not years.
 

Crash893

"The man in black fled across the desert,
Joined
Mar 13, 2001
Zatrix said:
but i have static ip. my friend said i could only change the last 2 octlets of the adress. but i cant just renew it? just the last 2 octlets is hard work. you gotta renter all your stuff and stuff


i have no idea waht your talking about

if you go to the cmd

and ipconfig/all

and you see these lines

dhcp enabled ............................yes
some stuff
lease obtained....................... date
lease expires...........................date

then you have a dynamic ipaddress

belive me you have to ask and it costs money to have a static ip address
 

Solo3021

Registered
Joined
Jul 22, 2004
ISP's almost NEVER use static IP addressing. It is possible, but they usually leave the DHCP server at automatic addressing.

And yes, if you leave, the lease will renew itself exactly half-way before the lease is expired and you will retain the same IP address. Now if you unplug from the service, you will most likely get a new address from the ISP.