Ramesh, I've never actually gotten a ROACH to talk directly to a server. The auto-negotiation in the NIC is not great.
You pretty much need a switch in-between. Which is why Jason recommended using an old 100Mbps switch. Regards, James On Fri, Apr 17, 2020 at 4:00 PM Ramesh Karuppusamy <[email protected]> wrote: > > > I just tried this by putting a spare network interface on to 100mbps and > also forcing the ROACH1 eth0 to 100mpbs - this did not help. Looks like the > ethernet device on the ROACH1 is dead. > > I used mii-tool to force 100mbps operation: > > root@roach:~# mii-tool -F 100baseTx-HD eth0 > root@roach:~# mii-tool eth0 > eth0: 100 Mbit, half duplex, link ok > > And similar command on a server with spare eth3 (connected to the ROACH in > question). > > Cheers, > Ramesh > > > > > On 17. Apr 2020, at 15:41, James Smith <[email protected]> wrote: > > Just to add to what Jason has said, older 100 Mbps switches are easy > enough to pick up secondhand on eBay and such, depending on where you are. > They're quite cheap. > > On Fri, Apr 17, 2020 at 3:19 PM Jason Manley <[email protected]> wrote: > >> >> > Since we are running the ancient Debian Etch on this unit, I have no >> access to ethtool, with which I understand that you can switch to 100mpbs. >> Is there any other way to force 100mbps operation? >> >> This actually wouldn't work anyway (we tried it). Something is broken in >> that Nat.Semi PHY's autonegotiation. Sometimes it works, other times not. >> And some boards were more susceptible to failing. >> >> You really need a 100mbps switch, or a 1Gbps switch that you can >> down-speed to lock the port to 100mbps. >> >> Jason >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "[email protected]" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/D5D51B6A-2024-4B77-9FC7-7E84CE46DF6F%40ska.ac.za >> . >> > > -- > You received this message because you are subscribed to the Google Groups " > [email protected]" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAG67D34keSLJjoTLLjOVHXA0WEcsPbxTyb6p9F10rz%3DPcvcF0w%40mail.gmail.com > <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAG67D34keSLJjoTLLjOVHXA0WEcsPbxTyb6p9F10rz%3DPcvcF0w%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > > -- > You received this message because you are subscribed to the Google Groups " > [email protected]" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/655FF706-CBDF-4F80-B2EC-BB8B327DB13B%40mpifr-bonn.mpg.de > <https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/655FF706-CBDF-4F80-B2EC-BB8B327DB13B%40mpifr-bonn.mpg.de?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/a/lists.berkeley.edu/d/msgid/casper/CAG67D36OV-KJ%2BY%2BND8sBOCwGWS_HFmUP4fF_cNu7O-0SHhB23g%40mail.gmail.com.
