Weird. Are there any other hosts on the network that might be also sending (non-netboot-aware) DHCP offers?
What does "sudo tcpdump -i eth0 -n -e -v port bootps or port bootpc" show (replacing eth0 with the actual network interface name where the DHCP activity is). Dave On May 26, 2015, at 4:34 PM, Brad Dober wrote: > Hi Dave, > > I switched to a 100 Mbps switch, and now I'm still getting the ROACH1 > continuously sending DCHP discovers, and my host computer continuously > sending offers, but now the occasional request/acknowledge and uboot download > is no longer happening. > > For what it's worth, I am not using jumbo frames. > > > Brad Dober > Ph.D. Candidate > Department of Physics and Astronomy > University of Pennsylvania > Cell: 262-949-4668 > > On Tue, May 26, 2015 at 7:21 PM, David MacMahon <dav...@astro.berkeley.edu> > wrote: > Are you trying to run the ROACH1 on 1 GbE? ROACH1 is not reliable on 1 GbE. > You have to force it to be 100 Mbps. This can be done by using an unmanaged > non-gigabit switch (or hub), a managed switch that can force its port for the > ROACH1 to be 100 Mbsp only. For direct connect, you'll have to use > "mii-tool" on the server. > > Another thing that always gets me is MTU. I don't think the ROACH1 u-boot > supports jumbo frames, so you'll have to run the server with MTU==1500 to > netboot ROACH1. > > Dave > > On May 26, 2015, at 3:51 PM, Brad Dober wrote: > > > I've switched to NFS boot to avoid SD card corruptions. > > > > However, when attempting to run netboot, the roach will send an IP > > discover, the host will offer one, and then the roach will send a discover > > again. > > This goes on for 10-15 times when finally the roach will request the > > correct IP, and the host will acknowledge. The roach will then begin the > > tftp of the uboot image, but will request block 1 multiple times, gets sent > > it, acknowledges once starts getting block 1 and 2 sent and then restarts > > the whole process asking for an IP request. > > > > The whole process seems very strange and I'm having trouble wrapping my > > head around what could be causing it. > > > > Has anyone encountered something similar??? > > > > > > Brad Dober > > Ph.D. Candidate > > Department of Physics and Astronomy > > University of Pennsylvania > > Cell: 262-949-4668 > > > > On Thu, May 21, 2015 at 3:32 AM, Marc Welz <m...@ska.ac.za> wrote: > > > > > > On Wed, May 20, 2015 at 5:19 PM, Brad Dober <do...@sas.upenn.edu> wrote: > > Hi Casperites, > > > > I have a Roach1 which is booting from an SD card. > > I booted it up yesterday, and it was displaying the "STALE NFS handle" > > error that other people have seen in the past (which suggested a corrupt > > flash card). I ran fsck and fixed several errors, and when rebooting, the > > stale nfs handle error went away. However, now the ROACH could not connect > > to the network. > > > > When I run "ifconfig 128.91.46.20 netmask 255.255.248.0 gateway 128.91.4", > > I get: > > "gateway: Host name lookup failure" > > > > root@(none):~# hostname -v > > (none) > > > > If you require a hostname, put it in /etc/hostname or similar and then run > > > > hostname -f /etc/hostname > > > > regards > > > > marc > > > > > > > >
