Re: DHCP lease
Hi All, Does anyone know why I would be losing my DHCP lease whenever my ibook goes to sleep? I am running an 800Mhz ibook with the latest OSX updates if that helps any... adam. What is providing the DHCP addresses? A Windows box? A router? It's possible that another device on the network is grabbing the address when your machine is not on the network. Try locating the address from a different machine when you've got your iBook off the network, as it might help narrow down what's grabbing it. Of course, DHCP address allocations aren't permanent. Have fun, Shay -- === Shay Telfer Perth, Western Australia Technomancer Join Team Sungroper, race the Opinions for hire [POQ] 2003 World Solar Challenge [EMAIL PROTECTED] fnord http://sungroper.asn.au/
Re: DHCP lease
On Tue, 2003-10-07 at 14:55, Shay Telfer wrote: What is providing the DHCP addresses? A Windows box? A router? It's possible that another device on the network is grabbing the address when your machine is not on the network. Try locating the address from a different machine when you've got your iBook off the network, as it might help narrow down what's grabbing it. Of course, DHCP address allocations aren't permanent. Have fun, Shay Hi Shay, Its actually a windows 2000 Pro machine thats offering the DHCP leases, but I am not taking my laptop off the network, its just going to sleep and losing the lease everytime. When it wakes up it takes about 30 seconds before I get the lease renewed. Its also not another machine taking the IP because a) I am using it at work and this would mean that someone is getting a new lease everytime my laptop goes to sleep, and b) The leases have a lifetime of 3 weeks... Adam.
Re: DHCP lease
On Tue, 2003-10-07 at 15:04, Adam Hewitt wrote: I am not taking my laptop off the network, ..and.. its just going to sleep and losing the lease everytime. These two statements are contradictory, because a sleeping computer is not on the network. When it wakes up it takes about 30 seconds before I get the lease renewed. Sounds pretty reasonable. Its also not another machine taking the IP because a) I am using it at work and this would mean that someone is getting a new lease everytime my laptop goes to sleep, and b) The leases have a lifetime of 3 weeks... Well that all depends... DHCP is dynamic. The server could release the lease if your Macintosh announces to the server that it doesn't need the lease anymore - which is what a good network citizen AFAIK should do... Just because the database doesn't change, or no-one else takes up the free address - even if the IP address is hard-wired to the MAC address, doesn't mean that the lease has been released... Now, if you can convince your admin to give you a permanently leased address, then you could change your address to fixed, but that would defeat the purpose of using DHCP. Onno Benschop Connected via Optus B3 at S15:51'18 - E128:45'05 (Crossing Falls, Kununurra, WA) -- ()/)/)()..ASCII for Onno.. |?..EBCDIC for Onno.. --- -. -. --- ..Morse for Onno.. Proudly supported by Skipper Trucks, Highway1, Concept AV, Sony Central, Dalcon ITmaze - ABN: 56 178 057 063 - ph: 04 1219 - onno at itmaze dot com dot au
Re: DHCP lease
On Tue, 2003-10-07 at 15:41, Onno Benschop wrote: its just going to sleep and losing the lease everytime. These two statements are contradictory, because a sleeping computer is not on the network. Ok well when my windows machine goes to sleep it has network connectivity immediately upon waking. Besides what use is the wake on Lan option if the machine is no longer contactable on the network?? When it wakes up it takes about 30 seconds before I get the lease renewed. Sounds pretty reasonable. Its also not another machine taking the IP because a) I am using it at work and this would mean that someone is getting a new lease everytime my laptop goes to sleep, and b) The leases have a lifetime of 3 weeks... Well that all depends... DHCP is dynamic. The server could release the lease if your Macintosh announces to the server that it doesn't need the lease anymore - which is what a good network citizen AFAIK should do... Not in my opinion, and that is exactly what I believe is happening and what I want to prevent. Just because the database doesn't change, or no-one else takes up the free address - even if the IP address is hard-wired to the MAC address, doesn't mean that the lease has been released... Now, if you can convince your admin to give you a permanently leased address, then you could change your address to fixed, but that would defeat the purpose of using DHCP. I am the network admin ;) and I would rather figure out why this is happening and fix it rather than give myself a fixed IP...but it is quite annoying Maybe I will just give myself a fixed IP until I can find a resolution...hmmm Adam. Senior Network Engineer ;)
Re: DHCP lease
On Tue, 2003-10-07 at 15:52, Adam Hewitt wrote: Ok well when my windows machine goes to sleep it has network connectivity immediately upon waking. I'm guessing that's because it's not releasing its lease... Besides what use is the wake on Lan option if the machine is no longer contactable on the network?? Just because something doesn't have an IP address, doesn't mean it's not contactable... I am the network admin ;) and I would rather figure out why this is happening and fix it rather than give myself a fixed IP...but it is quite annoying Maybe I will just give myself a fixed IP until I can find a resolution...hmmm Well, if you're the admin, figure it out :-) Seriously, sniff the network, see if the Macintosh is relinquishing its lease... Onno Benschop Connected via Optus B3 at S15:51'18 - E128:45'05 (Crossing Falls, Kununurra, WA) -- ()/)/)()..ASCII for Onno.. |?..EBCDIC for Onno.. --- -. -. --- ..Morse for Onno.. Proudly supported by Skipper Trucks, Highway1, Concept AV, Sony Central, Dalcon ITmaze - ABN: 56 178 057 063 - ph: 04 1219 - onno at itmaze dot com dot au
