| SL(4) | Device Drivers Manual | SL(4) |
sl —
pseudo-device sl
sl interface allows asynchronous serial lines to be
used as IPv4 network interfaces using the SLIP protocol.
To use the sl interface, the administrator
must first create the interface and assign a tty line to it. The
sl interface is created using the
ifconfig(8)
create subcommand, and
slattach(8) is used to
assign a tty line to the interface. Once the interface is attached, network
source and destination addresses and other parameters are configured via
ifconfig(8).
The sl interface can use Van Jacobson TCP
header compression and ICMP filtering. The following flags to
ifconfig(8) control these
properties of a SLIP link:
J. Romkey, A Nonstandard for Transmission of IP Datagrams over Serial Lines: SLIP, RFC, 1055, June 1988.
Van Jacobson, Compressing TCP/IP Headers for Low-Speed Serial Links, RFC, 1144, February 1990.
sl device appeared in NetBSD
1.0.
| July 9, 2006 | NetBSD 8.99 |