Jens Neu <jens....@biotronik.com> wrote: > > 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: > .....'spanning-tree portfast default'?
The PXE times out before the STP action has finished and the port is in blocking mode for the duration. You should also consider 'spanning-tree portfast bpduguard/filter default' too. Cheers -- Alexander Clouter .sigmonster says: That's what she said. _______________________________________________ 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/