The port is probably not go into a forwarding state before the clients dhcp broadcast is sent to the server, so the server never gets the request.
Try enabling portfast on the ports that are not trunks. You will get a warning when you enable this feature and as long as you follow the warning you will be ok. The command on a 2900 is switch(config)#int f0/x switch(config-if)#spanning-tree portfast Dan ---------- Original Message ----------- From: Tom Schouteden <[EMAIL PROTECTED]> To: nessus-list <[EMAIL PROTECTED]> Sent: 13 Jun 2003 14:38:08 +0200 Subject: pxe & spanning tree > Hi > > I've recently installed an LTSP on RedHat 9. I'm using Via Eden > based "thin clients" with PXE booting, which in turn boot Etherboot > to boot an LTSP kernel. The onboard NIC on the Via's are Realtek's 8139. > > When I boot the thin client over a crossover link everything is working > just fine. However, when I use our Cisco Catalyst 2900 Switch I > don't even get an IP address and get the following error message: > "PXE-E51: No DHCP or proxy DHCP offers were received. PXE-M0F: > Exiting PXE ROM" and subsequently it attempts to boot from disk > which isn't there. > > According to previous posts this means I should enable spanning-tree > on the switch, but it already is, as you can see here: > > Switch>sh sp s > > UplinkFast is disabled > PortFast BPDU Guard is enabled > > Name Blocking Listening Learning Forwarding STP Active > -------------------- -------- --------- -------- ---------- ---------- > VLAN1 4 0 0 8 12 > -------------------- -------- --------- -------- ---------- ---------- > 1 VLAN 4 0 0 8 12 > > I don't see any DHCP requests on the server either. > > Does anyone have any suggestions? > > tnx > tom ------- End of Original Message -------
