Dear,
I have the following problem with the voice vlan. Once everything is configured according to the manual so that it takes me on the phones, I must leave the Tagged ports option. But when the switch is rebooted it returns to the default configuration of Untagged Ports and the phone does not take the voice vlan. I tried from both the web and the CLI, I can make the change, but even if I save the changes made when restarting the switch, it returns to the Untagged option. Please if any of you can help me.