Did you try longer (lossier) copper cables between BEE2 and switch ? by longer I'm thinking say 2 or 3 meters.
Did you try active copper or fiber optic cables ? On Tue, 24 Nov 2009, John Ford wrote:
Hi all. We've been running GUPPI for some time now with a direct connection from our bee2, "bee2" to our host, "beef". Works fine, no dropped packets, etc. Life's fine. To build our next machine, GUPPI-2, we decided to insert a Fujitsu XG-2000C switch between them, and now we are losing packets. Same hardware, same software, except the switch is now between the bee2 and the host. We have very short cables on all the ports. 1 meter or 0.5 meter. Changing cables had no effect. Changing switch ports had no effect. The ports are set to use jumbo packets. Moving the cable from the switch back to the host fixes the problems, and it all magically works again. Other hosts on the 10 gbe network do not seem to suffer from packet loss. The switch's monitoring screens do not show any packet loss in the switch. Does the switch do anything to the timing of the packets? Any ideas about incompatible NIC's? They are all myricom pcie cards. Any other ideas? John
