3Com SuperStack 3 3C17204 Getting Started Manual

Also see for 3C17203 - SuperStack 3 Switch 4400: Datasheet Getting started guide Getting started guide Implementation guide Getting started guide

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3Com SuperStack 3 3C17204 Getting Started Manual Manual pdf 35 page image

Setting Up Overview 35CAUTION: To protect your Switch from unauthorized access, you mustchange all three default passwords as soon as possible, even if you do notintend to actively manage your Switch. For more information on defaultusers and changing default passwords, see “Default Users andPasswords” on page 54.IP Configuration You can use one of the following methods to allocate IP information toyour Switch (essential if you wish to manage your Switch across thenetwork).Manual IP ConfigurationYou can choose to configure the IP information yourself. The Switchremembers the information that you enter until you change it again orset the configuration method to Automatic.You should use the Manual IP configuration method if:■ you do not have a DHCP or BootP server on your network, or■ you want to remove the risk of the IP address ever changing, or■ your DHCP or BootP server does not allow you to allocate static IPaddresses. (Static IP addresses are necessary to ensure that the Switchis always allocated the same IP information.)For most installations, 3Com recommends that you configure the SwitchIP information manually. This makes management simpler and morereliable as it is not dependent on a DHCP or BootP server, and eliminatesthe risk of the IP address changing.If you wish to manually enter IP information for your Switch, workthrough the “Manually Configuring IP Information” section on page 37.Automatic IP ConfigurationBy default the Switch tries to configure itself with IP information withoutrequesting user intervention. It tries to obtain an IP address from a DHCPor BootP server on the network.If neither server is found, the Switch will configure itself with its default IPaddress 169.254.100.100 if it is operating in a standalone mode, and/orno other Switches on the network have this IP address. If this default IPaddress is already in use on the network then the Switch detects this andconfigures itself with an IP address in the range 169.254.1.0 to169.254.254.255.DUA1720-3AAA09.book Page 35 Wednesday, July 6, 2005 4:33 PM