Hello everyone,
Today I try to connect my laptop to RB750 via Ethernet Port 4 but no network on laptop,
No LED on RB750 port 4 and laptop Ethernet port.
Tried another cable, it still not working, but change a port on RB750 and it works.
Now my RB750 running with RouterOS v6.25 (downgrade from 6.35.4) and RouterBOOT v3.33
(but winbox shown upgrade firmware is 3.21)
I tried using a simple cable tester to test the cable from RB750,
(From Ethernet Port 4 (RB750) <—to—> Cable Tester)
The cable tester 1, 2, 3 and 6 LED light is on.
And used “Realtek Ethernet Diagnostic Utility” to test the cable, it shows:
(Sometimes all is “normal”, but refresh it will change to “mismatch”)
I don’t know is the problem of Ethernet port or RouterBOOT version newer than “Upgrade Firmware”?
Regards.
After reboot it works back again, but what cause that?