Hello Evaldo Souza,   Is this an N-series switch?   Has this worked before or it this a new install?   If you could post a picture of what you are seeing it could help.   Try a power drain; shut down, remove all power for two minutes, reconnect and check results.
Greetings, I have a strange problem with a 1548 switch. At first glance it appears to be working, lights flashing, console access, ping response. But it doesn't allow internet access. Then, when I took out some cables, the lights keep on, as if still connected. And when I turned it off and on again, the same connection lights, without cable, come back on too.  Any info or ideas about this issue?
Switch 1548 seems to be frozen