Serial line communications
SCO TCP/IP offers two protocols that allow you to
route data over serial lines:
SLIP, the older protocol, supports a wide
range of hardware and is straightforward to configure.
PPP was created to enhance the capabilities of
Each protocol supports the following:
multiple simultaneous links (64 for PPP and SLIP)
communications initiated from either the local or remote host
dynamic acquisition of serial lines, allowing for lines to
be shared with programs such as uucp
dynamic link configuration, negating the need for kernel relinks
packet filtering based on packet type
PPP offers the following capabilities in addition to
those offered by SLIP:
Authentication of connection requests with CHAP
(Challenge-Handshake Authentication Protocol) or PAP
(Password Authentication Protocol), which provides additional security.
Multiple levels of debugging data, which appear on
the console and in the system logfile.
Error detection through the use of a checksum program.
Connect-time negotiation of IP addresses, authentication methods,
compression, and other configurable parameters.
Packet priority handling
Two-level packet handling, where telnet, rlogin, and
ftp packets have a higher priority than all other packets.
Support for multiple protocols. SLIP only supports the
httpd server support
Support for httpd servers, used by
World Wide Web browsers.
SNMP MIB support
Support for SNMP queries for objects in the
PPP Link Control Protocol MIB and
the PPP Network Control Protocol MIB.
If your network is simple, static, and does not have use for the
capabilities of PPP, use SLIP. If you are
connecting to a service provider to use the Internet or you
want to use the additional features provided, use PPP.
Configuring serial lines
To configure serial lines:
Install and configure TCP/IP with
the Network Configuration Manager.
UNRESOLVED XREF-0 SLIP
UNRESOLVED XREF-0 PPP
links with the Network Configuration Manager.
Administering serial lines
Serial line administration consists of:
UUCP and cu
Other compatible stacks
© 2007 The SCO Group, Inc. All rights reserved.
SCO OpenServer Release 6.0.0 -- 05 June 2007