Sounds like spanning-tree port enable delay, issue try using spanning-tree portfast on the PXE client port
Op 8-1-2010 14:04, Jens Neu schreef: > Der all, > > I have a Catalyst 2948G which seems to keep PXE boot from working > properly. This one Cat2948 is the only Layer 2 device between the DHCP/PXE > boot server and the PXE client - both are directly connected and share a > /24. PXE boot is not working at all, and DHCP is unbearably slow, for no > apparent reason. Both PXE Server and Client(s) are various IBM xSeries > using the onboard GBit interfaces. > Now the fun stuff: when I put a second Layer 2 device between the Cat 2948 > and the PXE client, it is magically working. > Means: PXE Server -> Cat 2948 -> "some cheap Netgear Office switch" -> PXE > Client == works. In fact, any additional Layer 2 device that appears > between PXE Client and the Cat 2948 scares the problem away. > > Anyone seen this before? Any hints where to start looking? The switch > looks as follows: > > WS-C2948 Software, Version NmpSW: 8.4(11)GLX > Copyright (c) 1995-2006 by Cisco Systems, Inc. > NMP S/W compiled on Apr 27 2006, 12:46:44 > GSP S/W compiled on Apr 27 2006, 11:47:52 > > System Bootstrap Version: 6.1(4) > > Hardware Version: 2.5 Model: WS-C2948 Serial #: JAE061500JB > > Mod Port Model Serial # Versions > --- ---- ------------------ -------------------- > --------------------------------- > 1 0 WS-X2948 JAE061500JB Hw : 2.5 > Gsp: 8.4(11.0) > Nmp: 8.4(11)GLX > 2 50 WS-C2948G JAE061500JB Hw : 2.5 > > DRAM FLASH NVRAM > Module Total Used Free Total Used Free Total Used Free > ------ ------- ------- ------- ------- ------- ------- ----- ----- ----- > 1 65536K 37349K 28187K 12288K 10648K 1640K 480K 85K 395K > > best regards! > > Jens Neu > > Phone: +49 (0) 30 68905-2412 > Mail: jens....@biotronik.de > > > www.biotronik.com > > BIOTRONIK SE & Co. KG > Woermannkehre 1, 12359 Berlin, Germany > Sitz der Gesellschaft: Berlin, Registergericht: Berlin HRA 6501 > > Vertreten durch ihre Komplementärin: > BIOTRONIK MT SE > Sitz der Gesellschaft: Berlin, Registergericht: Berlin HRB 118866 B > Vorsitzender des Verwaltungsrats: Dr. Max Schaldach > Geschäftsführende Direktoren: Christoph Böhmer, Dr. Werner Braun, Dr. > Lothar Krings > > BIOTRONIK - A global manufacturer of advanced Cardiac Rhythm Management > systems and Vascular Intervention devices. Quality, innovation, and > reliability define BIOTRONIK and our growing success. We are innovators of > technologies like the first wireless remote monitoring system - Home > Monitoring®, Closed Loop Stimulation and coveted lead solutions as well as > state-of-the-art stents, balloons and guide wires for coronary and > peripheral indications. We highly invest in the development of drug > eluting devices and are leading the industry with our bioabsorbable metal > stent program. > > This e-mail and the information it contains including attachments are > confidential and meant only for use by the intended recipient(s); > disclosure or copying is strictly prohibited. If you are not addressed, > but in the possession of this e-mail, please notify the sender immediately > and delete the document. > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ Erik Versaevel _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/