IP Addresses...

[lilcee]

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?

Moved to correct forum please do not post in the articles section

[Kymmy]

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]

Originally Posted by Kymmy

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]

Originally Posted by AbyssUnderground

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]

mine has chanced this week i have been moved to new ubr

[AbyssUnderground]

Originally Posted by Andrewcrawford23

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]

Originally Posted by AbyssUnderground

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]

Originally Posted by Andrewcrawford23

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]

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]

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]

Originally Posted by Zhadnost

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]

Zhadnost is correct. Andrewcrawford23 is, well, less correct. It's seven days.

[Ignitionnet]

Originally Posted by Andrewcrawford23

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]

Cisco also provide the majority of the DHCP software, of course, which may have been what he was groping towards.