85Field DescriptionLinkPhysical link state of the interface, which can be:• UP—The link is up.• ADM—The link has been administratively shutdown. To recover its physical state, perform theundo shutdown command.Protocol Protocol connection state of the interface, which canbe UP, DOWN, or UP(s).Main IP The main IP address of the interface.Description Description of the interface.CauseThe cause of a DOWN physical link. If the port hasbeen shut down with the shutdown command, thisfield displays Administratively. To restore the physicalstate of the interface, use the undo shutdowncommand.display mfrSyntaxdisplay mfr [ interface interface-type interface-number | verbose ] [ | { begin | exclude | include }regular-expression ]ViewAny viewDefault level1: Monitor levelParametersinterface interface-type interface-number: Specifies an interface by its type and number. The specifiedinterface must be a main interface.verbose: Displays detailed statistics, including the number of controlling packets sent and received.|: Filters command output by specifying a regular expression. For more information about regularexpressions, see Fundamentals Configuration Guide.begin: Displays the first line that matches the specified regular expression and all lines that follow.exclude: Displays all lines that do not match the specified regular expression.include: Displays all lines that match the specified regular expression.regular-expression: Specifies a regular expression, a case-sensitive string of 1 to 256 characters.DescriptionUse the display mfr command to display configuration and statistics of the specified multilink frame relaybundle and bundle link.If neither interface nor verbose is specified, this command displays the brief information of all maininterfaces.