Hi everyone, I've faced with a problem about using ethernet cable, when i want to connect two BBB peer to peer. When i connect one BBB through a ethernet cable to a switch or to my host computer, the link becomes successfully up and i can connect to BBB. But when i connect two BBB peer to peer, result is different. in this case, link not brought up and the LEDs of ethernet ports not light up and hence i can't ping from one BBB to another one. Some points are here: 1- Sometimes, after a while about 1, 2, minutes... or more, the link becomes up. 2- If we reset one of the boards, link becomes up. 3- according to smsc.c driver notes, "Due to HW bug, LAN8700 sometimes does not detect presence of energy in the Ethernet cable in Energy Detect Power-Down mode". So i disabled energy detect mode according to https://git.backbone.ws/linux/backbone-sources/commit/d88ecb373bd1877acc43e13311a8e0e6daffc3d <https://git.backbone.ws/linux/backbone-sources/commit/d88ecb373bd1877acc43e13311a8e0e6daffc3d> but the resule is same. 4- The phy chip on BBB is LAN8710, and debian 8.3 as OS.
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