2 3Com Switch 4200G FamilyCommand ReferenceDisplaying Command ParametersAt the prompt, enter the name of the command followed by a space and ?. For example:4200G>boot ?The following parameters are displayed:attribute-switch Exchange the file main-attribute and backup-attribute.boot-loader Select a file to boot at the next timebootrom Update Bootromweb-package Set web resource packageTo specify boot loader, enter the command as follows:>boot boot-loader ?You only need to enter ? if parameters exist for the command.Displaying Parent MenusAt the prompt, enter quit.Displaying the User View MenuPress .Obtaining HelpAt the prompt, enter ?.Further InformationFor further information about how to use the command line interface, refer to the Command Reference Guide andthe Configuration Guide, which are both available as PDF documents on the CD that accompanied the unit.Commandsaccess-limitUse the access-limit command to set the maximum number of access users that can be contained incurrent ISP domain.ISP Domain viewaccountingUse the accounting command to configure an accounting scheme for the current ISP domain.ISP Domain viewaccounting domainUse the accounting domain command to enable the DHCP accounting function.DHCP Address Pool viewaccounting-on enableUse the accounting-on enable command to enable user re-authentication upon device restart function.RADIUS Scheme viewaccounting optionalUse the accounting optional command to open the accounting-optional switch.ISP Domain viewRADIUS Scheme viewaclUse the acl command to reference ACL and implement the ACL control to the TELNET users.User Interface viewWeb command: Security -> Authorized IP