Continue of ethernet flapping interface problem /sorry for copypasting the thread, have no time/ :
Same trouble with http://www.mikrotik.com/download/share/ ... be-5.8.npk
, ethernet freezes after 1 day of work, downgrading ROS to 4.17 have solve this problem.
ROS 5.7, firmware v. 2.36. I Have the problem - RB435G at random times(it may be one hour or one day) freezes ethernet interfaces to pass ip traffic, interface at that time says that "link ok"(i use 1G connection with different devices at different places, ~8 BOARDS with PC and board-to-board connections, most time of all its freezes at 2 RB435g's with bridge functions- wireless interface bridged with ethernet, not matter with which - ether1 or ether2 or ether3), wireless interface at the same time work properly and i can access the board via wireless, after rebooting board its' all right for a random time. A guess i have similar problem with the same topics - http://bugs.mikrotik-routeros.com/view.php?id=15
, viewtopic.php?f=1&t=55021&start=50, viewtopic.php?f=0&t=55021&p=282149&hilit=435G
#p282149, viewtopic.php?f=3&t=55610 etc.
Only one solution is to turn off or on /interface Ethernet switch set 0 switch_all_ports=yes or no, after that routerboard starts to transmit data. But i don't use hardware switch for boards, no master or slave interfaces, only program switch for bridging Ethernet iface with wireless, Don't know exact what the problem is, power supply is good, cables is good(at first time we think that the cables cat5e was caused the problem for 1G connection, and than replaced them to cat7 cables - have the same issue).
A hope for some assistance, it's not suitable to downgrade software or firmware on boards to avoid similar problems with configuration - a can't to stop transmission through that link cause they are situated on commercial towers and it's not real to get the boards directly.
My opinion - it's a firmware trouble of RB435G at a side of Ethernet sensitivity, may be i'm wrong.
I hope the MTIK team to help.