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SL(4) Device Drivers Manual SL(4)

slip network interface

pseudo-device sl

The sl interface allows serial lines to be used as network interfaces using the slip protocol.
An sl interface can be created at runtime using the ifconfig slN create command or by setting up a hostname.if(5) configuration file for netstart(8).
The following link-level options are configurable via ifconfig(8):
Use Van Jacobson TCP header compression.
Suppress ICMP traffic.
Auto-enable Van Jacobson TCP header compression (enabled by default).

sl0: afX not supported.
The interface was handed a message with addresses formatted in an unsuitable address family; the packet was dropped.

inet(4), netintro(4), hostname.if(5), ifconfig(8), ldattach(8), netstart(8), sliplogin(8), slstats(8)
April 23, 2014 OpenBSD-5.6