3Com Baseline 2226-PWR Plus User Manual

Also see for 3C16475BS: Datasheet

Contents

Modifying the IP Address Settings 31have not previously set a password, leave this fieldblank.3 In New Password, type the password that you want toset.4 In Confirm Password, retype the password you typedin step 3 to confirm.The password is case-sensitive.5 Click Apply.If you want to modify the admin password later on,follow the same procedure.If you forget the administration password after youset it, refer to “Forgotten Password” on page 52 forinformation on how to regain access to the Webinterface.Modifying the IP Address SettingsTo enable devices on the network to communicatewith the Switch, you need to assign an IP address to it— either by DHCP or by manually assigning a static IPaddress.By default, the Switch performs automatic IP configu-ration and assigns an IP address to itself. This is neces-sary for the Discovery application to be able toconnect to the Web interface.Automatic IP ConfigurationWhen you power on the Switch for the first time, itautomatically uses the default IP address169.254.x.y, where x and y are the last two bytes ofits MAC address.To determine the exact IP address that the Switchassigns to itself during auto IP configuration, checkthe sticker on the base of the Switch. This sticker con-tains the MAC address and default IP address of theSwitch.To detect its IP information using the automatic con-figuration process, the Switch goes through the fol-lowing sequence of steps:1 The Switch tries to configure itself with the default IPaddress 169.254.x.y, where x and y are convertedfrom the last two bytes of its MAC address.For example, if the MAC address is 08004E000102, theIP address would be 169.254.1.2. This address is usedif the Switch is operating in a standalone mode, or noother switches on the network have this IP address.The Switch also assigns the subnet mask 255.255.0.0(default class B mask) to itself.2 If this default IP address is already in use on the net-work, then the Switch detects this, and incrementsthe last byte of the MAC address by one to generateits IP address.The IP address would therefore become 169.254.1.3.3 The Switch repeats step 2 until an unused IP addressis found.