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Test Your Knowledge in Computers #567
Difficulty: Medium
The ternary if-then-else operator generally has the following syntax: E ? X : Y where E is a Boolean expression and if true, the statement is assigned the value Y.
True or False?
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sppptun(1m) [opensolaris man page]

sppptun(1M)						  System Administration Commands					       sppptun(1M)

NAME
sppptun - PPP tunneling driver utility SYNOPSIS
sppptun plumb sppptun plumb protocol device sppptun unplumb interface sppptun query DESCRIPTION
The sppptun utility is used to configure and query the Solaris PPP tunneling device driver, /dev/sppptun. Currently, only PPP over Ether- net (PPPoE) is supported, so the plumb and unplumb arguments are used to specify Ethernet interfaces that are to be used for PPPoE, and the query option lists the plumbed interfaces. The use of sppptun to add interfaces is similar to the use of ifconfig(1M) to add interfaces to IP. The plumbing is done once for each interface, preferably at system start-up time, and is not normally manipulated on a running system. If multiple instances of PPP are run over a single interface, they share the plumbing to that interface. Plumbing for each session is not required (and not possible for PPPoE). The proper way to plumb interfaces for PPPoE is to list the interfaces, one per line, in the /etc/ppp/pppoe.if file. USAGE
sppptun plumb When specified with no additional arguments, the plumb argument lists the protocols that are supported by the utility. These are the strings that are used as the protocol argument below. sppptun plumb protocol device This plumbs a new interface into the driver. The protocol parameter is pppoe for the PPP-carrying "Session Stage" connection or pppoed for the PPPoE "Discovery Stage" connection. Both connections must be present for each Ethernet interface that is to be used for PPPoE. The device parameter is the path name of the Ethernet interface to use (use ifconfig(1M) to list available devices). If the path begins with /dev/, then this portion may be omitted. sppptun unplumb interface This removes an existing interface from the driver and terminates any PPP sessions that were using the interface. The interface parame- ter is the name of the interface as reported when the interface was plumbed. sppptun query Displays the canonical names of all interfaces plumbed into the /dev/sppptun device driver. EXAMPLES
Example 1 Setting up to Use PPPoE on hme0 Plumb the hme0 interface. # sppptun plumb pppoed hme0 hme0:pppoed # sppptun plumb pppoe hme0 hme0:pppoe Remove the hme0 interface. # sppptun unplumb hme0:pppoed # sppptun unplumb hme0:pppoe Example 2 Script to Remove All Plumbed Interfaces #!/bin/sh for intf in `sppptun query` do sppptun unplumb $intf done EXIT STATUS
The following exit values are returned: 0 Successful completion. 1 One or more errors occurred. FILES
/etc/ppp/pppoe.if list of Ethernet interfaces to be plumbed at boot time /usr/sbin/sppptun executable command /dev/sppptun Solaris PPP tunneling device driver ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWpppdt | +-----------------------------+-----------------------------+ SEE ALSO
pppd(1M), pppoec(1M), pppoed(1M), sppptun(7M) RFC 2516, Method for Transmitting PPP Over Ethernet (PPPoE), Mamakos et al, February 1999 SunOS 5.11 19 Mar 2001 sppptun(1M)

Check Out this Related Man Page

PPPOE-CONNECT(8)					      System Manager's Manual						  PPPOE-CONNECT(8)

NAME
pppoe-connect - Shell script to manage a PPPoE link SYNOPSIS
pppoe-connect [config_file] pppoe-connect interface user [config_file] DESCRIPTION
pppoe-connect is a shell script which manages a PPPoE connection using the Roaring Penguin user-space PPPoE client. If you omit con- fig_file, the default file /etc/ppp/pppoe.conf is used. If you supply interface and user, then they override the Ethernet interface and user-name settings in the configuration file. Note that normally, you should not invoke pppoe-connect directly. Instead, use pppoe-start to bring up the PPPoE connection. pppoe-connect first reads a configuration file. It then brings up a PPPoE connection. If the connection ever drops, a message is logged to syslog, and pppoe-connect re-establishes the connection. In addition, each time the connection is dropped or cannot be established, pppoe-connect executes the script /etc/ppp/pppoe-lost if it exists and is executable. The shell script pppoe-stop causes pppoe-connect to break out of its loop, bring the connection down, and exit. TECHNICAL DETAILS
pppoe-connect uses the following shell variables from the configuration file: ETH The Ethernet interface connected to the DSL modem (for example, eth0). USER The PPPoE user-id (for example, b1xxnxnx@sympatico.ca). PIDFILE A file in which to write the process-ID of the pppoe-connect process (for example, /var/run/pppoe.pid). Two additional files ($PID- FILE.pppd and $PIDFILE.pppoe) hold the process-ID's of the pppd and pppoe processes, respectively. By using different configuration files with different PIDFILE settings, you can manage multiple PPPoE connections. Just specify the con- figuration file as an argument to pppoe-start and pppoe-stop. AUTHOR
pppoe-connect was written by David F. Skoll <dfs@roaringpenguin.com>. The pppoe home page is http://www.roaringpenguin.com/pppoe/. SEE ALSO
pppoe(8), pppoe-start(8), pppoe-stop(8), pppd(8), pppoe.conf(5), pppoe-setup(8), pppoe-status(8), pppoe-sniff(8), pppoe-server(8), pppoe- relay(8) 4th Berkeley Distribution 21 February 2000 PPPOE-CONNECT(8)

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