(Ted Harding) wrote: > On 14-Oct-07 21:42:59, Aniruddha wrote: > >> On Sun, 2007-10-14 at 14:34 -0700, joe wrote: >> >>> Aniruddha wrote: >>> >>>> My brother get his ip adres through DHCP from a large >>>> college lan, his ip changes with regular intervals. >>>> I wonder is it possible reserve one particular ip for >>>> his machine and if so how do I do this? >>>> >>> Sure - are you the admin of the dhcp server? >>> >>> Joe >>> >>> >> Errr, I am afraid not. He just receives his ip adress through dhcp. >> > > There is one thing he could try, which may or may not work often > enough to to be useful. > > Say he gets a particular IP address one time. Let him note that, > and configure his own machine to have that IP address statically > configured in his machine (this may involve setting up a static > DNS and gateway too, so it might not be trivial). > > Then, if when he next connects, that particular IP address is > free the remote server should simply recognise that he is > using it, and not try to give it to anyone else. Since it's > static on his mkachine, it would not change so long as he > remained connected. > > (This is exactly what I do on my home LAN, by the way: The ADSL > router gives out dynamic IPs by DHCP to any connected machine > that asks for one, but does not interfere with any machines > that have static IPs configured in them; and whenever I connect > some other machine -- e.g. I'm trying out different Linux distros > in virtual machines and off live CDs at the moment, and they all > ask for DHCP in the first instance -- the router aloways gives > them an IP different from the statitically configured ones. > Of course, if one or more of the statically configured machines > was switched off, then presumably the router could use one of > their IP addresses, since it's not in use). > > Whether this suggestion is useful would depend on the demand > for IP addresses on that campus. If an idle IP address gets > snapped up quickly, then it would be no use at all! > > On the other hand, if his disconnections are brief, then > there may be a good chance that this trick could work well > enough. > > If it failed at any time, of course, then he'd just have to > revert to DHCP for that connection. > >
Some networks will refuse connections from a computer that doesn't have a MAC address that's currently assigned an IP. Also, network admins can turn into nasty trolls (not that they aren't already <g>) when they find someone using a static address. -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
