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SLIP/PPP questions

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Old 09-30-2010
SLIP/PPP questions
Hello all..

I need to script SLIP dial-up connections and wanted ask others about the following;

- does pppd support SLIP (noticed some releases do and some don't)
- if pppd doesn't support SLIP can bash variables be passed to a dip script (e.g. phone-number, ip-address)
- or is another means of establishing a SLIP connection

I have PPP dial-up connections working and was curious if anyone has ran into the following problem;

- each PPP connection established has a unique unit id (e.g. ppp0, ppp1 - basically the device numbers/indexes, in my case, are unique)
- from time to time chat timeout errors occur when initiating more than one PPP connection simultaneously (e.g. ppp0 on tty00, ppp1 on tty01, ppp2 on tty02)

Please advise if additional information is needed and I am using Ubuntu.

Thanks in advance.
Last edited by LAVco; 09-30-2010 at 09:03 PM..
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LEARN ABOUT OSF1

slattach

slattach(8)						      System Manager's Manual						       slattach(8)

NAME

       slattach - Attaches a serial line to a network interface

SYNOPSIS

       /usr/sbin/slattach [{+|-} {c|e|i}] ttyname [baudrate]

DESCRIPTION

       The  slattach  command  assigns	a tty line to a network interface, allowing terminal devices to communicate across a network.  The ttyname
       argument is the name of any valid tty device in /dev.  This can be either the full path name (for example, /dev/tty01) or the name in  /dev
       (for example, tty01).  The optional baudrate argument is used to set the speed of the connection.  The default speed is 9600 baud.

       The  tty  line is attached to the first available network interface (sl0, sl1, already be configured with the local and remote addresses of
       each end of the SLIP connection (see ifconfig(8)).

       Only a person with superuser authority can attach a network interface.

       To detach the interface, use the ifconfig interface_id down command after terminating the slattach process.  interface_id is the name  that
       is shown by the netstat command.

FLAGS

       Enables	(+) or disables (- TCP header compression.  Enables (+) or disables (- automatic TCP header compression. If enabled and the remote
       system is using TCP header compression, TCP header compression is automatically enabled on the local system.  If both local and remote sys-
       tems  have  enabled this flag, TCP header compression is not used. One system must force the use of TCP header compression.  Enables (+) or
       disables (- ICMP traffic suppression. If enabled, ICMP traffic (like that generated by ping(8)) is not allowed to pass over the	SLIP  con-
       nection.

       When  the  system  is  booted, all flags are initially disabled. Once a flag is enabled, it remains enabled until the system is rebooted or
       until another slattach command is issued with the flag disabled.

NOTES

       The slattach command requires the Serial Line Internet Protocol (SLIP), which the kernel must support.  If  making  a  SLIP  connection	to
       another	Tru64  UNIX  system,  both systems must run slattach. If making a SLIP connection to a system not running the Tru64 UNIX operating
       system, the other system must support the SLIP protocol.

EXAMPLES

       To attach a tty device to a network interface, enter: /usr/sbin/slattach /dev/tty01 4800 This command attaches tty01 to a network interface
       to be used by the Serial Line Internet Protocol (SLIP).	The connection speed is 4800 baud.

       To attach a tty device to a network interface at 19200 bits per second (bps), with TCP header compression enabled and ICMP traffic suppres-
       sion disabled, enter: /usr/sbin/slattach +c -i /dev/tty01 19200

FILES

       Specifies the command path Contains the slattach process ID

RELATED INFORMATION

       Commands: netstat(1), ifconfig(8)

       Specifications: SLIP is described in RFC1055.  TCP header compression is described in RFC1144.  delim off

																       slattach(8)