> -----Original Message----- > From: Andre Tomt [mailto:an...@tomt.net] > Sent: Sunday, August 07, 2016 12:27 AM > To: e1000-devel@lists.sourceforge.net > Subject: Re: [E1000-devel] X552 SFP+ link problems > > On 06. aug. 2016 09:16, Andre Tomt wrote: > > Hi > > > > I'm having some problems getting the X552 SFP+ to link to some link > > partners using 10G SR optics and 10G 1m passive DAC. > > > > When connecting it to a Zyxel XS1920-12 10G switch the link gets stuck > > in a loop. The link fails when connected directly to a Mellanox > > ConnectX-3 En Pro SFP+ PCIe card as well (but doesnt "loop") > > A very interesting observation. > Running "ethtool --test eno7 offline" fixes the link. > > "ip link set dev eno7 up && ethtool -t eno7 offline" also works. link comes up > fast and stays up. > > However if link is unplugged/disabled on switch and plugged in/turned back on, > it starts looping again. > > Link detection timing issue? >
I haven't ever seen similar behavior but I also don't have a Broadcom switch. I'll see if our validation has such a switch and can attempt to recreate what you're seeing. Have you attempted to limit "force" the link speed (i.e. only advertise one speed)? Also if you black list the driver (ixgbe) and cold boot the system with the cable plugged into a live switch do you see the LED on port up or does it link flap like you see when the driver is loaded? Thanks, -Don Skidmore <donald.c.skidm...@intel.com> ------------------------------------------------------------------------------ What NetFlow Analyzer can do for you? Monitors network bandwidth and traffic patterns at an interface-level. Reveals which users, apps, and protocols are consuming the most bandwidth. Provides multi-vendor support for NetFlow, J-Flow, sFlow and other flows. Make informed decisions using capacity planning reports. http://sdm.link/zohodev2dev _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
