On Thu, Sep 21, 2017 at 7:53 PM, Berend De Schouwer <berend.de.schou...@gmail.com> wrote: > Hi, > > I've got a machine with a Broadcom bcm5762c, using the tg3 driver, that > fails to receive network packets under some very specific conditions. > > It works perfectly using a 1Gbps switch. If, however, it first uses > PXE and then loads the Linux tg3 driver, and the switch is 100Mbps, it > no longer receives packets larger than ICMP. > > It does do ARP and ping. > > If it boots using PXE on a 1Gbps switch, boots into Linux, and then > it's plugged into 100 Mbps it also stops receiving packets. > > mii-diag and dmesg confirm auto-negotiated speed and flow control, and > confirm temporary disconnect as the cables are moved. > > PXE boots using UNDI, which then transfers a kernel using TFTP, which > transfers correctly. The kernel boots, loads the tg3 driver, connects > the network. Up to this point everything works. Ping will work too. > Any other network traffic fails. > > Booting from a harddrive works fine. I assume the UNDI driver > somewhere breaks auto-negotiation. I've tried using mii-tool and > ethtool, but I haven't managed to make it work yet. > > Is it possible to get negotiation working after PXE boot? Are there > any tg3 driver flags that might make a difference? > > > Berend
Can you please share below details? 1) Model and Manufacturer of the system 2) Linux distro/kernel used?
