I want to connect a Cisco SG-500 switch to a Unifi 16XG switch.I bought 2 SFP+ DAC cables.When I create a loop from 16XG (port 3<->4), the connection lights blinkWhen I create a loop on SG-500 (port 25<->26), the connection lights blink as well.When ...

I have a problem with my SG-500 switch: it seems to have problems at the login part. No user is allowed to log in anymore.  I have 2 of them (cisco and reserve), and none of them work. Tried http/https and telnetThe switch reports to an external sysl...