 For example, if Multi-link Point-to-Point Protocol (PPP) is a required feature, before this feature can be used the CP and the FP hosting the MLPPP interface must have the mlppp feature loaded.As well, the vast array of objects available to an operator can be daunting, especially for an individual starting out with Nortel Passport switches for the first time.As well, built in documentation leaves much to be desired (thus not helping the first-time operator), and tab completion features are non-existent (though some objects and parameters have shorthand names, for example the Virtual Router component can simply be known as a Vr).