Advanced link device options

The following options define advanced configuration information for a link device:

Modules pushed before use

A list of streams modules that must be ``pushed'' onto the device before it can be used by PPP traffic. The modules and drivers will be added in the order specified. The default module pushed for dedicated serial lines, modems and asynchronous ISDN devices is asyh.

Modules popped before use

A list of streams modules and drivers that must be ``popped'' from the device before it can be used. The modules and drivers will be removed in the order specified. The default modules popped for dedicated serial lines, modems and asynchronous ISDN devices are ttcompat and ldterm.

Device bandwidth

An estimate of the available bandwidth on the physical device in bits per second. If specified, this value is used when choosing which device to assign to a link, however, it is ignored for devices (such as ISDN) that can provide bandwidth information directly.