Configuring Point-to-Point Interfaces for IS-IS
You can use the point-to-point statement to configure a LAN interface to act like a point-to-point interface for IS-IS. You do not need an unnumbered LAN interface, and it has no effect if configured on an interface that is already point-to-point.
The point-to-point statement affects only IS-IS protocol procedures on that interface; all other protocols continue to treat the interface as a LAN interface. Only two IS-IS routing devices can be connected to the LAN interface and both must be configured as point-to-point.
To configure a point-to-point IS-IS interface, include the point-to-point statement:
For a list of hierarchy levels at which you can include this statement, see the statement summary section for this statement.
