I do 100-100. Each of our two DHCP servers can service the entirety of our small network. FYI, there is a DHCP option to release the IP address on shutdown, but we don't use that. You might try it if you get bored.
Devin On Fri, May 1, 2009 at 1:40 PM, Jim Dandy <jda...@asmail.ucdavis.edu> wrote: > I still don't get the 80-20 thing. 50-50 would distribute the load > better and would potentially give you more leases if one fails. Perhaps > the hope is that the one that fails is the one with 20% and that 80% > would give you adequate addresses to be fully functional while you fix > the 20. > > Thanks for the info on the no-broadcast for renewals. Here is another > question ... > > 3) Let's say you reboot your client before the lease expires. On reboot > does it do a broadcast to get a new address or does it just try to renew > from the DHCP server from which it got its original lease? > > Curt > >> -----Original Message----- >> From: Kennedy, Jim [mailto:kennedy...@elyriaschools.org] >> Sent: Friday, May 01, 2009 11:17 AM >> To: NT System Admin Issues >> Subject: RE: DHCP 80-20 rule >> >> >> > -----Original Message----- >> > From: Jim Dandy >> >> > 1) Why 80-20? Why not 50-50? If one server fails, wouldn't it be >> > better for the other server to have a larger range from which to >> > distribute addresses? >> >> The 20 is designed to keep you alive and running while you fix the 80 > server. >> Certainly a full range on both servers to serve all your clients would > be >> great, if your subnetting and available addresses allow it. >> >> > >> > 2) Let's say everything is working perfectly and both DHCP servers > are >> > up. Client1 requests an address and receives address 192.168.0.1 > from >> > DHCPServer1. Time passes until half of the lease time has expired > so >> > Client1 requests an address. This time DHCPServer2 is a little > faster >> > and provides address 192.168.0.129. >> >> At 50 percent the client contacts the original leasing server directly > to >> renew that lease. It does not do a brand new lease broadcast. It will > continue >> to ask directly until it gets an answer. If it can't it will then > broadcast >> for a brand new lease. >> >> >> ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ >> ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > > ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ > ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~ > > -- Devin ~ Finally, powerful endpoint security that ISN'T a resource hog! ~ ~ <http://www.sunbeltsoftware.com/Business/VIPRE-Enterprise/> ~
