#define IFT_NSIP 0x1b /* XNS over IP */
#define IFT_SLIP 0x1c /* IP over generic TTY */
#define IFT_PPP 0x1d /* PPP over generic TTY */
#define IFT_NSIP 0x1b /* XNS over IP */
#define IFT_SLIP 0x1c /* IP over generic TTY */
#define IFT_PPP 0x1d /* PPP over generic TTY */