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-   -   IP Addresses... (https://www.cableforum.uk/board/showthread.php?t=33638931)

lilcee 21-09-2008 13:35
IP Addresses...
 
I've been told that IP addresses are dynamic and not static. However, my IP address has remained unchanged for some time now... why is this?

zing_deleted 21-09-2008 13:42
Re: IP Addresses...
 
Moved to correct forum please do not post in the articles section

Kymmy 21-09-2008 13:50
Re: IP Addresses...
 
IP addresses tend to stay with the user until certain circumstances..
  • MAC address of the PC/Router attached to the modem changes
  • UBR gets resegmented
  • Modem gets replaced

Some people have had the same IP for years, others haven't

AbyssUnderground 21-09-2008 14:51
Re: IP Addresses...
 
Quote:
Originally Posted by Kymmy (Post 34640608)
IP addresses tend to stay with the user until certain circumstances..
  • MAC address of the PC/Router attached to the modem changes
  • UBR gets resegmented
  • Modem gets replaced

Some people have had the same IP for years, others haven't
Further to that they're named "sticky" IP's. Your IP is always assigned to you, providing its not been assigned to someone else in the pool first.

The IP can change, just not very often.

Andrewcrawford23 21-09-2008 15:13
Re: IP Addresses...
 
Quote:
Originally Posted by AbyssUnderground (Post 34640624)
Further to that they're named "sticky" IP's. Your IP is always assigned to you, providing its not been assigned to someone else in the pool first.

The IP can change, just not very often.
it can change ever time you connect but that does not happen often, if you conenct between two different amcs address al the time you will find oyu will go between 7 ips address

g0mit 21-09-2008 15:13
Re: IP Addresses...
 
mine has chanced this week i have been moved to new ubr

AbyssUnderground 21-09-2008 15:36
Re: IP Addresses...
 
Quote:
Originally Posted by Andrewcrawford23 (Post 34640629)
it can change ever time you connect but that does not happen often, if you conenct between two different amcs address al the time you will find oyu will go between 7 ips address
Like I said, providing its not been assigned to someone else in the pool.

Andrewcrawford23 21-09-2008 16:40
Re: IP Addresses...
 
Quote:
Originally Posted by AbyssUnderground (Post 34640636)
Like I said, providing its not been assigned to someone else in the pool.
If you havea different mac address oyu get a new ip

AbyssUnderground 21-09-2008 18:45
Re: IP Addresses...
 
Quote:
Originally Posted by Andrewcrawford23 (Post 34640654)
If you havea different mac address oyu get a new ip
Of course. You can force a new IP by connecting a different computer or changing the MAC address of the computer/router interface too. Obviously you can't change the MAC of the modem.

Zhadnost 23-09-2008 10:11
Re: IP Addresses...
 
I thought the story was, you get a 7 day lease, if your modem is not connected when the lease expires then the IP goes into the available pool whereby another user may get it. If the IP is still available when the modem is then turned back on you will still get it for another seven days. (or something like that).

Russ_64 24-09-2008 16:40
Re: IP Addresses...
 
In general that is correct however the ISP has control of the DHCP server so they can change the parameters controlling the length of the IP lease, etc.

Andrewcrawford23 24-09-2008 17:21
Re: IP Addresses...
 
Quote:
Originally Posted by Zhadnost (Post 34641418)
I thought the story was, you get a 7 day lease, if your modem is not connected when the lease expires then the IP goes into the available pool whereby another user may get it. If the IP is still available when the modem is then turned back on you will still get it for another seven days. (or something like that).
that is how it worked on dial up but since virign use cisco they have otehr parameters that aint the normal to what you are tlaking about but you do havea lease period i think its about 300 days then if you modem is not on when it reissues then you get a new one next tiem you conenct

BBKing 25-09-2008 09:51
Re: IP Addresses...
 
Zhadnost is correct. Andrewcrawford23 is, well, less correct. It's seven days.

Ignitionnet 25-09-2008 10:54
Re: IP Addresses...
 
Quote:
Originally Posted by Andrewcrawford23 (Post 34642183)
that is how it worked on dial up but since virign use cisco they have otehr parameters that aint the normal to what you are tlaking about but you do havea lease period i think its about 300 days then if you modem is not on when it reissues then you get a new one next tiem you conenct
Quick note - the Cisco equipment is in no way involved in IP address allocation / DHCP beyond forwarding the DHCP traffic between modem, client and server, the server being the equipment that deals with giving out and tracking the leases. It works as Zhadnost suggested.

It didn't work in that manner in dialup, dialup used PPP not DHCP and the IP address came directly from whichever modem you connected to at VM, not from a server.

BBKing 25-09-2008 13:32
Re: IP Addresses...
 
Cisco also provide the majority of the DHCP software, of course, which may have been what he was groping towards.


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