We have a Cisco sg220-50p switch that I am trying to configure. On first boot, not on the network, I log into the console and change the default password. I then save and reboot the switch. I then verify that I can log onto the web interface and the console with the new password. The issue I am having is when I plug into the network and get an IP address from DHCP I am no longer able to log into the console or the web interface. Just typing the username into the console will say Authentication failed and I get invalid username or password on the web interface. I cannot figure out why this happens once I have connected to the network. Has anyone else had this problem?
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