I have not done any testing so far but with the same device and cabling that worked ok before, ether3 on the AX2 seems to have intermittent problems.
This is the worst sequence I could find in the logs, most of the time the problem is less severe.
apr/16 11:18:36 interface,info ether3 link down
apr/16 11:18:56 interface,info ether3 link up (speed 100M, full duplex)
apr/16 11:21:45 interface,info ether3 link down
apr/16 11:21:46 interface,info ether3 link up (speed 10M, full duplex)
apr/16 11:21:47 interface,info ether3 link down
apr/16 11:21:48 interface,info ether3 link up (speed 10M, full duplex)
apr/16 11:21:55 interface,info ether3 link down
apr/16 11:22:14 interface,info ether3 link up (speed 100M, full duplex)
apr/16 11:22:40 interface,info ether3 link down
apr/16 11:22:41 interface,info ether3 link up (speed 10M, full duplex)
apr/16 11:22:44 interface,info ether3 link down
apr/16 11:22:48 interface,info ether3 link up (speed 10M, full duplex)
apr/16 11:22:53 interface,info ether3 link down
apr/16 11:23:12 interface,info ether3 link up (speed 100M, full duplex)
apr/16 11:23:13 interface,info ether3 link down
apr/16 11:23:20 interface,info ether3 link up (speed 100M, full duplex)
apr/16 11:26:47 interface,info ether3 link down
apr/16 11:27:05 interface,info ether3 link up (speed 1G, full duplex)
apr/16 11:27:11 interface,info ether3 link down
apr/16 11:27:12 interface,info ether3 link up (speed 1G, full duplex)
apr/16 11:35:57 interface,info ether3 link down
apr/16 11:35:58 interface,info ether3 link up (speed 1G, full duplex)