> -----Original Message----- > From: centos-bounces at centos.org > [mailto:centos-bounces at centos.org] On Behalf Of Kanwar Ranbir Sandhu > Sent: Tuesday, January 16, 2007 2:28 PM > To: CentOS mailing list > Subject: [CentOS] dhcpd errors > > Hello Everyone, > > I'm running a dhcp server on CentOS 4.4. It's providing IPs > and remote > booting for a number of thin clients. > > I've recently had problems rebooting a few thin clients. Here is the > error I've been seeing: > > Jan 16 14:16:45 at01 dhcpd: DHCPRELEASE from > 00:40:63:e5:71:4f specified > requested-address. > Jan 16 14:16:45 at01 dhcpd: DHCPRELEASE of 10.1.1.150 from > 00:40:63:e5:71:4f via eth0 (not found) > > Depending on the thin client, the MAC and the IP changes. Otherwise, > the errors are all the same. > > The effect on the thin client end is that it doesn't get an IP, and so > it doesn't boot. The usual remedy is to unplug/plug-in the cat5 cable > at the thin client, or to move the thin client to another > network drop. > > This has me thinking there's a problem with the cat5 cabling > (the office > is going through a major renovation). But, I'm not 100% that is the > case. It could be a problem with the dhcp server. > > I don't have easy access to that office - it's remote, and > I'm only out > there once every few months. It's why I want to make sure it's not a > software problem first. > > At the moment I have no clue what's going on. My searching > with google > hasn't turned up anything useful. > > I'd appreciate any comments/suggestions. If you are using Cisco switches make sure that you have "spanning-tree portfast" set for each PC/thinclient port, otherwise the spanning-tree protocol negotiation phase might step on the DHCP offers. -Ross ______________________________________________________________________ This e-mail, and any attachments thereto, is intended only for use by the addressee(s) named herein and may contain legally privileged and/or confidential information. If you are not the intended recipient of this e-mail, you are hereby notified that any dissemination, distribution or copying of this e-mail, and any attachments thereto, is strictly prohibited. If you have received this e-mail in error, please immediately notify the sender and permanently delete the original and any copy or printout thereof.