Let the EdgeSwitch Fiber obtain an IP address and then check the DHCP server to see which IP address was assigned. To log in, follow these steps: Launch your web browser. Press enter (PC) or return (Mac). You can set up individual IPv4 addresses for each logical switch. Use the. Thank you for purchasing the Ubiquiti Networks® EdgeSwitch® Fiber. This Quick Start Guide is designed to guide you through installation and also includes warranty terms. I know that "show cable-diag tdr int [slot/port]" command can check 10/100/1000 etherent link. for example WS-X6724-SFP Is there no command to check fiber link?? Thank you 04-01-2009 10:48 PM It's got. VLAN 1 default IP address. VLAN 1 is configured by default to receive DHCP, but after 120 seconds it will default to an IP address of “169. ” For this method, you will need to make sure that there is no DHCP server connected to the switch.